The cash difference between the selling prices of an article at a profit of 4% and 6% is Rs. 3. The ratio of the two selling prices is:__________ ?
A
51:52
B
52:53
C
51:53
D
52:55
Question 2Single Answer
Which of the following numbers is irrational ?
A
√49
B
0.125
C
√2
D
22/7
Question 3Single Answer
356 x 936 – 356 x 836 = ?
A
35600
B
34500
C
9630
D
93600
Question 4Single Answer
Arrange in descending order: 5/8, 7/10, 3/4
A
3/4 > 7/10 > 5/8
B
7/10 > 3/4 > 5/8
C
3/4 > 5/8 > 7/10
D
5/8 > 7/10 > 3/4
Question 5Single Answer
What is (3^{4} times 9^{2}) ?
A
36
B
38
C
310
D
96
Question 6Single Answer
If 34X-2 = 729, then find the value of X.
A
4
B
3
C
2
D
5
Question 7Single Answer
Convert 0.6 into fraction ?
A
3/5
B
2/3
C
4/5
Question 8Single Answer
The no. plate of a bus had peculiarity. The bus number was a perfect square. It was also a perfect square when the plate numbers were reversed. The bus company had only five hundred buses numbered from 1 to 500. What was the number ?
A
169
B
36
C
196
D
Can not say
Question 9Single Answer
If a and b are positive integers, such that ab = 125, then (a-b)a+b-4 = ?
A
16
B
25
C
28
D
30
Question 10Single Answer
If x*y = x2 + y2 – xy, then value of 9*11 is
A
93
B
103
C
60.5
D
121
Question 11Single Answer
Which is greater ?
A
15/16
B
17/18
C
Equal
D
Cannot compare
Question 12Single Answer
If sum of two numbers is 42 and their product is 437, then find their difference.
A
3
B
4
C
5
D
7
Question 13Single Answer
Write the 44000 in Roman numerals
A
XLI
B
XLVI
C
XLIV
D
XLVIC
Question 14Single Answer
Convert 0.0909… into fraction ?
A
1/11
B
9/11
C
1/9
D
9/10
Question 15Single Answer
What is (98 times 102) ?
A
9996
B
10000
C
10096
D
10196
Question 16Single Answer
Which is smaller ?
A
9/11
B
7/9
C
Equal
D
Cannot compare
Question 17Single Answer
Convert 0.5777… into fraction ?
A
26/45
B
52/90
C
13/22
D
5/9
Question 18Single Answer
Convert 0.81 into fraction ?
A
81/100
B
9/10
C
8/9
D
9/11
Question 19Single Answer
(63)2 – (12)2 =?
A
3528
B
3852
C
3582
D
3825
Question 20Single Answer
Which is greater ?
A
13/17
B
11/14
C
Equal
D
Cannot compare
Question 21Single Answer
16.928 + 24.7582 5.015 =?
A
20
B
24
C
22
D
26
Question 22Single Answer
Convert 0.75 into fraction ?
A
3/4
B
2/3
C
4/5
D
5/8
Question 23Single Answer
Which is greater ?
A
11/13
B
12/15
C
Equal
D
Cannot compare
Question 24Single Answer
Two numbers are co-prime if their HCF is ?
A
0
B
1
C
Same
D
Prime
Question 25Single Answer
Product of all factors of 10 is ?
A
10
B
100
C
1000
D
10000
General Intelligence and Reasoning
Question 26Single Answer
Passage :
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z .
Which letter in this alphabet is the eighth letter to the right of the letter and which is tenth letter to the left of the last but one letter of the alphabet ?
A
X
B
W
C
I
D
H
Question 27Single Answer
Passage :
Direction : The following question is based on the five words given below:
AND FOR THE BIG SUM (The new words formed after performing the mentioned operations may or may not necessarily the meaningful English words.)
If the third alphabet of each of the words is changed to the next alphabet in the English alphabetical series, which of the following will form a meaningful English word?
A
SUM
B
BIG
C
Both BIG and THE
D
FOR
E
Both FOR and BIG
Question 28Single Answer
Passage :
Direction : The following question is based on the five words given below:
AND FOR THE BIG SUM (The new words formed after performing the mentioned operations may or may not necessarily the meaningful English words.)
If the given words are arranged in the order as they would appear in a dictionary from left to right, which of the following will be second from the right ?
A
AND
B
FOR
C
THE
D
BIG
E
SUM
Question 29Single Answer
Passage :
Direction: The following question is based on the five words given below:
AND FOR THE BIG SUM (The new words formed after performing the mentioned operations may or may not necessarily the meaningful English words.)
If second alphabet in each of the words is changed to next alphabet in the English alphabetical order, how many words having two vowels (same or different vowels) will be formed ?
A
None
B
One
C
Two
D
Three
E
Four
Question 30Single Answer
Passage :
Direction : The following question is based on the five words given below:
AND FOR THE BIG SUM (The new words formed after performing the mentioned operations may or may not necessarily the meaningful English words.)
How many letters are there in the English alphabetical series between the second letter of the word which is second from the right and the second letter of the word which is second from the left of the given words?
A
Two
B
Five
C
Six
D
Nine
E
Three
Question 31Single Answer
Passage :
Direction: The following question is based on the five words given below:
AND FOR THE BIG SUM (The new words formed after performing the mentioned operations may or may not necessarily the meaningful English words.)
If in each of the given words, each of the consonant is changed to previous letter and each vowel is changed to next letter in the English alphabetical series, in how many words thus formed will no vowels appear?
A
None
B
One
C
Two
D
Three
E
More than three
Question 32Single Answer
Passage :
Direction : Following question is based on five words given below: BRU LEGINKCATOWN
(The new words formed after performing the mentioned operations may or may not necessarily be meaningful English words)
If the third alphabet in each of the words is changed to the next alphabet in the English alphabetical order, how many words having two vowels (same or different vowels) will be formed?
A
None
B
One
C
Two
D
Three
E
Four
Question 33Single Answer
Passage :
Direction : Following question is based on five words given below: BRU LEGINKCATOWN
(The new words formed after performing the mentioned operations may or may not necessarily be meaningful English words)
If the position of the first and the second alphabets of each of the words are interchanged, which of the following will form a meaningful English word?
A
Both CAT and OWN
B
Both BRU and INK
C
Only CAT
D
Only INK
E
Only LEG
Question 34Single Answer
Passage :
Direction: Following question is based on five words given below: BRU LEGINKCATOWN
(The new words formed after performing the mentioned operations may or may not necessarily be meaningful English words)
If the given words are arranged in the order as they would appear in a dictionary from left to right, which of the following will be exactly in the middle of the five words?
A
OWN
B
LEG
C
BRU
D
CAT
E
INK
Question 35Single Answer
Passage :
Direction: Following question is based on five words given below: BRU LEGINKCATOWN
(The new words formed after performing the mentioned operations may or may not necessarily be meaningful English words)
If in each of the given words, each of the consonants is changed to previous letter and each vowel is changed to next letter in the English alphabetical series, in how many words thus formed will the same alphabet appear twice?
A
None
B
One
C
Two
D
Three
E
More than three
Question 36Single Answer
Passage :
Find the missing number in the following series ?
3, 5, 5, 19, 7, 41, 9, ?
A
71
B
61
C
79
D
69
Question 37Single Answer
Passage :
Direction: following question is based on five words given below:
LAP BUT CAR SON HID
(The new words formed after performing the mentioned operations may or may not necessarily be meaningful English words.)
If the positions of the first and the third alphabets of each of the words are interchanged, which of the following would form meaningful words with the new arrangement?
A
HID
B
SON
C
Both LAP and BUT
D
CAR
E
Both CAR and LAP
Question 38Single Answer
Passage :
Direction: following question is based on five words given below:
LAP BUT CAR SON HID
(The new words formed after performing the mentioned operations may or may not necessarily be meaningful English words.)
If the given words are arranged in the order as they would appear in a dictionary from left to right, which of the following will be fourth from the left?
A
LAP
B
BUT
C
CAR
D
SON
E
HID
Question 39Single Answer
Passage :
Direction : following question is based on five words given below:
LAP BUT CAR SON HID
(The new words formed after performing the mentioned operations may or may not necessarily be meaningful English words.)
If in each of given words, each of the consonants is changed to previous letter and each vowel is changed to next letter in the English alphabetical series, in how many words thus formed will at least one vowel appear?
A
None
B
One
C
Two
D
Three
E
More than three
Question 40Single Answer
Passage :
Direction : following question is based on five words given below:
LAP BUT CAR SON HID
(The new words formed after performing the mentioned operations may or may not necessarily be meaningful English words.)
How many letters are there in the English alphabetical series between the third letter of the word which is third from the right and the first letter of the word which is first from the left of the given word?
A
Two
B
Five
C
Six
D
Nine
E
Three
Question 41Single Answer
Passage :
Direction: following question is based on five words given below:
LAP BUT CAR SON HID
(The new words formed after performing the mentioned operations may or may not necessarily be meaningful English words.)
If second alphabet in each of the words is changed to next alphabet in the English alphabetical order, how many words having no vowels will be formed?
A
None
B
One
C
Two
D
Three
E
More than three
Question 42Single Answer
Passage :
Direction: following letter is based on the five three letter words given below:
PIN ROD DEN SAT FUN
(Note: The words formed after performing the given operations may or may not be meaningful English words.)
If all the letters in each of the words are arranged alphabetically (within the word), how many words will remain unchanged?
A
One
B
Two
C
Three
D
More than three
E
None
Question 43Single Answer
Passage :
Direction: following letter is based on the five three letter words given below:
PIN ROD DEN SAT FUN (Note: The words formed after performing the given operations may or may not be meaningful English words.)
According to the English alphabetical series how many letters are there between the first letter of the third word and the first letter of the fifth word?
A
Two
B
One
C
None
D
Three
E
More than three
Question 44Single Answer
Passage :
Direction: following letter is based on the five three letter words given below:
PIN ROD DEN SAT FUN (Note: The words formed after performing the given operations may or may not be meaningful English words.)
If the first letter of all the words is changed to the previous letter of the English alphabetical series, how many words will have more than one vowel?
A
One
B
Two
C
Three
D
More than three
E
None
Question 45Single Answer
Passage :
Direction: following letter is based on the five three letter words given below:
PIN ROD DEN SAT FUN (Note: The words formed after performing the given operations may or may not be meaningful English words.)
If all the vowels (in all the words) are changed to the next letter of the English alphabetical series, how many words will form meaningful English words?
A
One
B
Two
C
Three
D
More than three
E
None
Question 46Single Answer
Passage :
Direction : following letter are based on the five three letter words given below:
PIN ROD DEN SAT FUN (Note: The words formed after performing the given operations may or may not be meaningful English words.)
If the positions of the first and last letters of all of the words are interchanged and then the words thus formed are arranged alphabetically form left to right, which of the following will be second from the left?
A
SAT
B
DEN
C
ROD
D
PIN
E
FUN
Question 47Single Answer
Passage :
Direction: Following question is based on the five three lettered words given below:
SHE AND TWO WIT GUM
(Note: The words formed after performing the given operations may or may not be meaningful English words)
If all the letters in each of the words are arranged in alphabetical order (within the word) how many words will remain unchanged?
A
One
B
Two
C
Three
D
More than three
E
None
Question 48Single Answer
Passage :
Direction: The following question is based on five words given below:
RAT ONE BUT AND SAW
(The new words formed after performing the mentioned operations may or may not necessarily be meaningful English words.)
If in each of the given words each alphabet is changed to the next letter in the English alphabetical series, in how many words thus formed have the consonants changed to vowels?
A
One
B
Two
C
Three
D
Four
E
Five
Question 49Single Answer
Passage :
Direction : The following question is based on five words given below:
RAT ONE BUT AND SAW
(The new words formed after performing the mentioned operations may or may not necessarily be meaningful English words.)
How many such pairs of the letters are there in the word highlighted in bold, each of which has as many letters between them in the word (in both forward and backward directions), as they have between them in the English alphabetical order?
A
None
B
One
C
Two
D
Three
E
Four
Question 50Single Answer
Passage :
Direction: The following question is based on five words given below:
RAT ONE BUT AND SAW
(The new words formed after performing the mentioned operations may or may not necessarily be meaningful English words.)
If the first alphabet of each of the words is changed to the next alphabet in English alphabetical series, how many meaningful English words will be formed?
A
One
B
Two
C
Three
D
Four
E
Five
Important Questions Package
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Basic Science & Engineering
Question 51Single Answer
Which type of projection represents a 3D object on a 2D plane using multiple views?
A
Isometric projection
B
Orthographic projection
C
Perspective projection
D
Axonometric projection
Question 52Single Answer
In which projection are the three axes inclined at equal angles of 120°?
A
Orthographic projection
B
Isometric projection
C
Perspective projection
D
Oblique projection
Question 53Single Answer
Which projection is commonly used in architectural drawings to show depth and realism?
A
Orthographic projection
B
Isometric projection
C
Perspective projection
D
Sectional projection
Question 54Single Answer
What is the key characteristic of an orthographic projection?
A
It shows a 3D object in a single view
B
It requires multiple views to represent an object
C
It distorts proportions
D
It is only used for artistic drawings
Question 55Single Answer
In an isometric projection, how are the three principal axes oriented?
A
Perpendicular to each other
B
At 30° to the horizontal
C
At 45° to the vertical
D
Parallel to each other
Question 56Single Answer
The top view of an object is projected onto which plane?
A
Horizontal plane
B
Vertical plane
C
Profile plane
D
Perspective plane
Question 57Single Answer
The side view of an object is projected onto which plane?
A
Horizontal plane
B
Vertical plane
C
Profile plane
D
Isometric plane
Question 58Single Answer
Sectional views are used to:
A
Show the hidden details of an object
B
Reduce the complexity of a drawing
C
Remove unnecessary dimensions
D
Create artistic representations
Question 59Single Answer
The front view of an object is projected onto which plane?
A
Horizontal plane
B
Vertical plane
C
Profile plane
D
Oblique plane
Question 60Single Answer
Which type of sectional view is used to cut an object completely in half?
A
Half section
B
Full section
C
Partial section
D
Offset section
Question 61Single Answer
Which instrument is used to draw circles and arcs?
A
Protractor
B
Compass
C
Set square
D
Scale
Question 62Single Answer
A 30°-60° set square is used to draw angles of:
A
15° and 45°
B
30° and 60°
C
45° and 90°
D
15° and 75°
Question 63Single Answer
Which instrument is primarily used for measuring angles?
A
Compass
B
Protractor
C
Divider
D
Scale
Question 64Single Answer
Which instrument is used to measure and transfer distances?
A
Protractor
B
Compass
C
Divider
D
Set square
Question 65Single Answer
A T-square is commonly used for:
A
Drawing horizontal lines
B
Measuring angles
C
Drawing curves
D
Creating sectional views
Question 66Single Answer
A continuous thick line is used to represent:
A
Hidden details
B
Object outlines
C
Centerlines
D
Dimension lines
Question 67Single Answer
Dashed lines in engineering drawings represent:
A
Visible edges
B
Hidden details
C
Centerlines
D
Construction lines
Question 68Single Answer
Chain lines are typically used to represent:
A
Dimensions
B
Centerlines
C
Cutting planes
D
Hidden edges
Question 69Single Answer
Which type of line is used for dimensioning?
A
Dashed line
B
Thick solid line
C
Thin continuous line
D
Centerline
Question 70Single Answer
A centerline is represented by:
A
A continuous thick line
B
A chain-dotted line
C
A dashed thick line
D
A wavy line
Question 71Single Answer
A regular polygon has:
A
Equal sides and angles
B
Unequal sides
C
Only equal angles
D
Only equal sides
Question 72Single Answer
The sum of interior angles of a hexagon is:
A
360°
B
540°
C
720°
D
900°
Question 73Single Answer
A right triangle has:
A
Three equal sides
B
One angle equal to 90°
C
Two equal angles
D
No right angles
Question 74Single Answer
The number of sides in a pentagon is:
A
4
B
5
C
6
D
8
Question 75Single Answer
A square is a special type of:
A
Triangle
B
Pentagon
C
Parallelogram
D
Hexagon
Question 76Single Answer
Which instrument is commonly used to draw horizontal parallel lines on a drawing board?
A
T-square
B
Divider
C
Compass
D
Protractor
Question 77Single Answer
Which instrument is used to draw circles and arcs?
A
Divider
B
Compass
C
Scale
D
Set square
Question 78Single Answer
A divider is mainly used for:
A
Drawing circles
B
Measuring angles
C
Transferring distances
D
Drawing horizontal lines
Question 79Single Answer
Which instrument is used to measure or construct angles?
A
T-square
B
Divider
C
French curve
D
Protractor
Question 80Single Answer
Which set square is normally used for drawing 45° lines?
A
30°–60° set square
B
45° set square
C
15° set square
D
75° set square
Question 81Single Answer
The standard angles of a 30°–60° set square are:
A
30°, 60°, 90°
B
30°, 45°, 90°
C
45°, 60°, 90°
D
15°, 75°, 90°
Question 82Single Answer
In engineering drawing, visible outlines are normally represented by:
A
Thin continuous lines
B
Dashed lines
C
Thick continuous lines
D
Chain lines
Question 83Single Answer
Hidden edges in an engineering drawing are represented by:
A
Dashed lines
B
Continuous thick lines
C
Chain lines
D
Freehand lines
Question 84Single Answer
A centre line is generally represented by:
A
Thick continuous line
B
Thin chain line
C
Thick dashed line
D
Zigzag line
Question 85Single Answer
Dimension lines are normally drawn as:
A
Freehand lines
B
Thick continuous lines
C
Thick chain lines
D
Thin continuous lines
Question 86Single Answer
In orthographic projection, the view seen from above is called the:
A
Front view
B
Side view
C
Top view
D
Auxiliary view
Question 87Single Answer
The view obtained by looking directly at the front of an object is called the:
A
Plan
B
Side elevation
C
Front elevation
D
Sectional view
Question 88Single Answer
In engineering drawing, the top view is also known as the:
A
Elevation
B
Plan
C
Profile
D
Perspective
Question 89Single Answer
Orthographic projection generally represents an object using:
A
Artistic sketches
B
Only perspective views
C
Photographic images
D
Two-dimensional views
Question 90Single Answer
Which projection gives a pictorial representation of an object with three dimensions visible?
A
Isometric projection
B
Orthographic projection
C
First-angle projection
D
Sectional projection
Question 91Single Answer
The angle between any two isometric axes is:
A
120°
B
90°
C
60°
D
180°
Question 92Single Answer
A circle drawn in isometric projection generally appears as a/an:
A
Circle
B
Ellipse
C
Square
D
Triangle
Question 93Single Answer
A polygon having three sides is called a:
A
Pentagon
B
Hexagon
C
Quadrilateral
D
Triangle
Question 94Single Answer
A polygon having five sides is called a:
A
Octagon
B
Hexagon
C
Heptagon
D
Pentagon
Question 95Single Answer
A regular hexagon has:
A
4 sides
B
5 sides
C
6 sides
D
8 sides
Question 96Single Answer
What is the SI unit of length?
A
Centimetre
B
Foot
C
Metre
D
Inch
Question 97Single Answer
What is the SI unit of mass?
A
Gram
B
Kilogram
C
Pound
D
Tonne
Question 98Single Answer
What is the SI unit of time?
A
Second
B
Hour
C
Minute
D
Day
Question 99Single Answer
The SI unit of force is:
A
Newton
B
Joule
C
Watt
D
Pascal
Question 100Single Answer
The SI unit of work is:
A
Watt
B
Joule
C
Newton
D
Ampere
Automobile Engineering
Question 101Single Answer
The primary purpose of a control system is to?
A
Increase mechanical friction
B
Regulate the output according to the desired input
C
Eliminate all energy losses
D
Increase the weight of equipment
Question 102Single Answer
An open-loop control system is characterized by?
A
Continuous output feedback
B
Automatic error correction
C
Absence of feedback from output
D
Closed feedback path
Question 103Single Answer
A closed-loop control system differs from an open-loop system because it?
A
Requires no input signal
B
Always operates without sensors
C
Cannot compensate for disturbances
D
Uses feedback to modify the control action
Question 104Single Answer
The difference between reference input and feedback signal is called?
A
Transfer ratio
B
Damping coefficient
C
Error signal
D
Frequency response
Question 105Single Answer
A transfer function is defined under zero initial conditions as the ratio of?
A
Output Laplace transform to input Laplace transform
B
Input force to output displacement
C
Output energy to input temperature
D
Feedback gain to system resistance
Question 106Single Answer
The Laplace transform of a unit-step function is?
A
s
B
1/s
C
s²
D
1/s²
Question 107Single Answer
The Laplace transform of a unit-impulse function is?
A
1/s²
B
s
C
1/s
D
1
Question 108Single Answer
A first-order system normally contains how many independent energy-storage elements?
A
Three
B
Four
C
Zero
D
One
Question 109Single Answer
The time constant of an RC circuit is?
A
R/C
B
RC
C
C/R
D
1/RC
Question 110Single Answer
The unit of time constant in the SI system is?
A
Hertz
B
Newton
C
Radian
D
Second
Question 111Single Answer
A first-order system reaches approximately what percentage of its final step-response value after one time constant?
A
50%
B
25%
C
63.2%
D
90%
Question 112Single Answer
The main function of a feedback sensor is to?
A
Increase the power supply voltage
B
Reduce the mechanical strength
C
Eliminate the controller
D
Measure the controlled variable
Question 113Single Answer
Negative feedback generally improves a control system's?
A
Sensitivity to parameter changes
B
Accuracy and disturbance rejection
C
Mechanical dimensions
D
Energy generation capacity
Question 114Single Answer
Positive feedback in a control system may result in?
A
Complete elimination of oscillations
B
Zero output under every condition
C
Automatic cancellation of all disturbances
D
Increased tendency toward instability
Question 115Single Answer
The steady-state error of a control system is the error remaining?
A
Before the input is applied
B
Only at the initial instant
C
During equipment installation
D
After transient effects have disappeared
Question 116Single Answer
A proportional controller produces an output proportional to?
A
The instantaneous error signal
B
The square of output speed
C
The integral of temperature alone
D
The derivative of system gain
Question 117Single Answer
Integral control is especially useful for eliminating?
A
Mechanical vibration in every system
B
All forms of measurement noise
C
Constant steady-state error in a stable closed-loop system
D
Electrical resistance
Question 118Single Answer
Derivative control responds primarily to the?
A
Total accumulated error
B
Average output pressure
C
Absolute reference voltage
D
Rate of change of error
Question 119Single Answer
PID stands for?
A
Proportional, Integral and Derivative
B
Pressure, Input and Displacement
C
Power, Inertia and Damping
D
Position, Induction and Distribution
Question 120Single Answer
A tachogenerator is commonly used to measure?
A
Fluid density
B
Thermal conductivity
C
Atmospheric humidity
D
Rotational speed
Question 121Single Answer
The governor of an automobile engine is primarily intended to regulate?
A
Coolant composition
B
Exhaust pipe diameter
C
Engine speed
D
Cylinder wall thickness
Question 122Single Answer
The mathematical relationship between output and input of a linear time-invariant system is commonly represented by?
A
Chemical equation only
B
Stress concentration factor
C
Transfer function
D
Gear tooth profile
Question 123Single Answer
The poles of a transfer function are the values of s that make its?
A
Denominator zero after cancellations
B
Numerator maximum
C
Input signal constant
D
Output force negative
Question 124Single Answer
The zeros of a transfer function are values of s that make its?
A
Numerator zero after cancellations
B
Feedback resistance zero
C
Denominator infinite
D
Time constant infinite
Question 125Single Answer
A stable continuous-time system has all its characteristic roots in the?
A
Right half of the s-plane
B
Origin only
C
Positive real axis
D
Left half of the s-plane
Question 126Single Answer
The damping ratio of a critically damped second-order system is?
A
0
B
1
C
2
D
0.5
Question 127Single Answer
An underdamped second-order system has a damping ratio?
A
Greater than zero but less than one
B
Greater than two
C
Equal to one
D
Less than zero
Question 128Single Answer
The damping ratio of an ideal undamped second-order system is?
A
2
B
0
C
1
D
0.707
Question 129Single Answer
An overdamped second-order system has a damping ratio?
A
Greater than one
B
Equal to zero
C
Between zero and one
D
Equal to 0.5
Question 130Single Answer
Natural frequency is generally expressed in?
A
Newton
B
Joule
C
Pascal
D
Radian per second
Question 131Single Answer
The rise time of a step response is commonly defined as the time required to?
A
Reach the maximum negative error
B
Rise from a specified lower percentage to a higher percentage of the final value
C
Complete one full oscillation
D
Reach zero output permanently
Question 132Single Answer
Maximum overshoot is related to the?
A
Resistance of conductors only
B
Initial energy of the input source
C
Peak response above the final value
D
Number of sensors installed
Question 133Single Answer
Settling time measures how long the response takes to?
A
Enter and remain within a specified tolerance band
B
Attain the first peak only
C
Become exactly zero
D
Reach maximum acceleration
Question 134Single Answer
A system with a large damping ratio generally exhibits?
A
Increasing oscillations
B
Reduced oscillatory tendency
C
Greater maximum overshoot
D
Higher resonance amplification
Question 135Single Answer
The characteristic equation of a unity negative-feedback system with forward transfer function G(s) is?
A
1 + G(s) = 0
B
1 - G(s) = 1
C
G(s) = s
D
G(s) = 0
Question 136Single Answer
The closed-loop transfer function for unity negative feedback is?
A
G(s)/[1 + G(s)]
B
1 + G(s)
C
1/G(s)
D
G(s)/[1 - G(s)]
Question 137Single Answer
The transfer function of two cascaded blocks G1(s) and G2(s) is?
A
G1(s)G2(s)
B
G1(s) + G2(s)
C
G1(s) - G2(s)
D
G1(s)/G2(s)
Question 138Single Answer
For two parallel blocks whose outputs are added, the equivalent transfer function is?
A
G1(s) + G2(s)
B
1/[G1(s) + G2(s)]
C
G1(s)/G2(s)
D
G1(s)G2(s)
Question 139Single Answer
A summing point in a block diagram is used to?
A
Measure shaft torque only
B
Store kinetic energy
C
Amplify heat energy
D
Algebraically combine input signals
Question 140Single Answer
A take-off point in a block diagram is used to?
A
Integrate the signal
B
Invert the signal
C
Distribute the same signal to multiple paths
D
Eliminate feedback
Question 141Single Answer
The order of a linear system is determined by the?
A
Number of input terminals
B
Magnitude of the reference input
C
Highest power of s in the characteristic polynomial
D
Number of mechanical joints
Question 142Single Answer
The system type in classical control theory is determined by the number of?
A
Zeros at infinity
B
Sensors in the feedback circuit
C
Poles at the origin in the open-loop transfer function
D
Output signals
Question 143Single Answer
A Type 0 unity-feedback system generally has a finite nonzero steady-state error for a unit-step input when its position error constant is finite and positive?
A
Yes
B
Only when the gain is infinite
C
Only for a ramp input
D
No, the error must always be zero
Question 144Single Answer
A Type 1 stable unity-feedback system has zero steady-state error for which input?
A
Parabolic input only
B
Sinusoidal input at every frequency
C
Step input
D
Random input only
Question 145Single Answer
A Type 1 unity-feedback system with finite positive velocity error constant has what steady-state error for a unit-ramp input?
A
Zero
B
Finite nonzero value
C
Infinite negative value
D
Oscillatory value without limit
Question 146Single Answer
A Type 2 stable unity-feedback system can have zero steady-state error for?
A
A cubic input only
B
A ramp input
C
Every sinusoidal input
D
All random inputs
Question 147Single Answer
The position error constant is represented by?
A
Kd
B
Kv
C
Ka
D
Kp
Question 148Single Answer
The velocity error constant of a unity-feedback system is generally represented by?
A
Kv
B
Ka
C
Kp
D
Ki
Question 149Single Answer
The acceleration error constant is represented by?
A
Kp
B
Kc
C
Kv
D
Ka
Question 150Single Answer
For unity negative feedback, the steady-state error due to a unit-step input is commonly?
A
1/(1 + Kp)
B
1/Kv
C
1/Ka
D
Kp
Question 151Single Answer
The Routh-Hurwitz criterion is used to determine?
A
Heat-transfer coefficient
B
Engine displacement
C
Stability without directly solving every characteristic root
D
Gear efficiency
Question 152Single Answer
A necessary condition for Hurwitz stability of a real characteristic polynomial with positive leading coefficient is that its coefficients are?
A
Strictly positive
B
All zero
C
Alternately positive and negative
D
Purely imaginary
Question 153Single Answer
The number of sign changes in the first column of a valid Routh array indicates the number of?
A
System zeros
B
Feedback sensors
C
Input signals
D
Right-half-plane characteristic roots
Question 154Single Answer
Root locus describes the movement of closed-loop poles as?
A
Input amplitude is reduced to zero
B
Temperature is held constant
C
Mass is removed from the system
D
A system parameter, usually gain, varies
Question 155Single Answer
Root locus branches begin at the?
A
Origin in every system
B
Closed-loop zeros only
C
Open-loop poles
D
Imaginary axis intersections only
Question 156Single Answer
Root locus branches terminate at?
A
Closed-loop poles for zero gain
B
Open-loop zeros, including zeros at infinity
C
All points on the imaginary axis
D
Only the negative real axis
Question 157Single Answer
The total number of root locus branches equals the number of?
A
Open-loop finite zeros
B
Gain crossover frequencies
C
Feedback summing points
D
Open-loop poles
Question 158Single Answer
If a system has four open-loop poles and two finite open-loop zeros, the number of root locus asymptotes is?
A
Two
B
Six
C
One
D
Four
Question 159Single Answer
The angle between asymptotes of a root locus with three poles and no finite zeros is?
A
30 degrees
B
120 degrees
C
90 degrees
D
180 degrees
Question 160Single Answer
The centroid of root locus asymptotes is calculated using?
A
Difference between pole sum and zero sum divided by the number of asymptotes
B
Product of all roots
C
Sum of damping ratios
D
Average input amplitude
Question 161Single Answer
A Bode plot consists of?
A
Stress and strain curves
B
Pressure and temperature curves only
C
Magnitude and phase plots against logarithmic frequency
D
Torque and power diagrams
Question 162Single Answer
The unit commonly used for logarithmic magnitude in Bode plots is?
A
Pascal
B
Kelvin
C
Decibel
D
Watt
Question 163Single Answer
A tenfold increase in frequency corresponds to?
A
One octave
B
One decade
C
One radian
D
One cycle
Question 164Single Answer
A doubling of frequency corresponds to?
A
Two decades
B
Ten octaves
C
One radian
D
One octave
Question 165Single Answer
A first-order pole contributes an asymptotic Bode magnitude slope of?
A
-20 dB/decade
B
+20 dB/decade
C
+40 dB/decade
D
-60 dB/decade
Question 166Single Answer
A first-order zero contributes an asymptotic Bode magnitude slope of?
A
+20 dB/decade
B
-20 dB/decade
C
Zero at every frequency
D
-40 dB/decade
Question 167Single Answer
The phase angle of a pure integrator 1/s is?
A
+90 degrees
B
-90 degrees
C
Zero degrees
D
180 degrees
Question 168Single Answer
The phase angle of a pure differentiator s is?
A
+90 degrees
B
-90 degrees
C
-180 degrees
D
Zero degrees
Question 169Single Answer
Gain crossover frequency is the frequency at which the open-loop magnitude is?
A
0 dB
B
20 dB
C
-40 dB
D
Infinite
Question 170Single Answer
Phase crossover frequency is the frequency at which the open-loop phase reaches?
A
+90 degrees
B
Zero degrees
C
-45 degrees
D
-180 degrees
Question 171Single Answer
Phase margin is evaluated at the?
A
Gain crossover frequency
B
Natural frequency only
C
Sampling frequency only
D
Resonance peak only
Question 172Single Answer
Gain margin is conventionally evaluated at the?
A
Initial frequency
B
Maximum mechanical speed
C
Phase crossover frequency
D
Nyquist sampling frequency
Question 173Single Answer
The Nyquist stability criterion uses the open-loop frequency response to determine?
A
Thermal efficiency
B
Engine compression ratio
C
Closed-loop stability
D
Shaft bending moment
Question 174Single Answer
The critical point for the standard unity negative-feedback Nyquist plot is?
A
(0, 0)
B
(-1, 0)
C
(0, 1)
D
(1, 0)
Question 175Single Answer
A phase lead compensator is commonly used to improve?