Question for GSECL Instrument Mechanic - Quiz / Questions / MCQ in English

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Latest GSECL Instrument Mechanic Exam Question (Objective Questions), MCQ in English

Subjects : Instrument Engineering, General Knowledge, Computer Knowledge, English, Gujarati Language & Grammar

Question Bank GSECL Instrument Mechanic (Instrument Engineering) Exam - English

Instrument Engineering

Q 1 :

The average power delivered to an impedance (4 – j3) by a current 5 cos (100​ t + 100) A is

1. A.44.2 W
2. B.50 W
3. C.62.5 W
4. D.125 W

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Q 2 :

​​In the circuit shown below, the current through the inductor is

1. D.zero

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Q 3 :

In the following figure, C₁ and C₂ are ideal capacitors. C₁ has been charged to 1 2 V before the ideal, switch S is closed at t = 0. The current /(t) for all t is 
​

1. A.zero
2. B.a step function
3. C.an exponentially decaying function
4. D.an impulse function

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Q 4 :

The important looking into nodes 1 and 2 in the given circuit is 
​

1. A.50 ​
2. B.100 ​
3. C.5 k ​
4. D.10.1 ​

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Q 5 :

If VA – VB = 6 V, then VC – CD is
​

1. A.– 5 V
2. B.2 V
3. C.3 V
4. D.6 V

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Q 6 :

Assuming both the voltage sources are in phase, the value of R for which maximum power is transferred from circuit A to circuit B is 
​

1. A.0.8 ​
2. B.1.4 ​
3. C.2 ​
4. D.2.8 ​

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Q 7 :

A capacitive motion transducer circuit is shown. The gap d between the parallel plates of the capacitor is varied as d(t) = 10^-3 n + 0.1 sin (1 000nt}] m. If the value of the capacitance is 2pF at t = 0 ms, the output voltage V, at t = 2 ms is
​

1. C.2 ​mV
2. D.4 ​mV

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Q 8 :

A psychrometric chart is used to determine

1. A.pH
2. B.sound velocity in glasses
3. C.CO₂ concentration
4. D.relative humidity

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Q 9 :

A strain gauge is attached on a cantilever beam as shown. If the base of the cantilever vibrates according to the equation x(t) =sin w1t +sin w2t, where 2 rad/s.
​
Then, the output of the strain gauge is proportional to

1. A.X
2. B.​

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Q 10 :

A dynamometer arm makes contact with the piezoelectric load cell as shown. 'The g-constant of the piezoelectric material is 50 x 10 - 3 V - m/N and the surface area of the load cell is 4 cm 2. If a torque = 20 N - m is applied to the dynamometer, the output voltage V₀ of the load cell is
​

1. A.4 V
2. B.5 V
3. C.10 V
4. D.16 V

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Q 11 :

Water (density: 1000 kg/m3) stored in cylindrical drum of diameter 1 m is emptied through a horizontal pipe of diameter 0.05 m. A pitot static tube is placed inside the pipe facing the flow. At the time when the difference between the stagnation and static pressures measured by the pitot - static tube is 10 k Pa. the rate of reduction in water level in the drum is

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Q 12 :

A U - tube manometer of tube diameter D is filled with a liquid of zero viscosity. If the volume of the liquid filled is v, the natural frequency of oscillations in the liquid level about its mean position, due to small perturbations is

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Q 13 :

The I - v characteristics of the diode given below are
  
The current in the circuit is
​

1. A.10 mA
2. B.9.3 mA
3. C.6.67 mA
4. D.6.2 mA

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Q 14 :

The voltage gain Av of the circuit shown below is
​

1. A.|AV|​ 200
2. B.|AV|​​ 100
3. C.|AV|​​ 20
4. D.|AV|​ 10

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Q 15 :

The circuit show is a â€‹
​

1. A.low - pass filter with â€‹ rad/s
2. B.high - pass filter with â€‹ rad/s
3. C.low - pass filter with â€‹ rad/s
4. D.high - pass filter with â€‹ rad/s

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Q 16 :

The output Y of a 2 bit comparator is logic 1 whenever the 2 bit input A is greater than the 2-bit input B. The number of combinations for which the output is logic 1, is

1. A.4
2. B.6
3. C.8
4. D.10

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Q 17 :

In the sum of products function f(X, Y, Z) = ​(2, 3, 4, 5), the prime implicants are

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Q 18 :

Consider the given circuit :
In this circuit, the race around
​

1. A.does not occur
2. B.occurs when CLK = 0
3. C.occurs when CLK = 1 and A = B = 1
4. D.occurs when CLK = 1 and A = B = 0

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Q 19 :

The state transition diagram for the logic circuit shown is 

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Q 20 :

Two independent random variables X and Y are uniformly distributed in the interval [–1, 1]. The probability that max [X, Y] is less than 1/2 is

1. A.3/4
2. B.9/1 6
3. C.1/4
4. D.2/3

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Q 21 :

The unilateral Laplace transform of f(t) is ​ The unilateral Laplace transform of t f (t) is

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Q 22 :

If x [n] = (1/3)^|n| – (1/2)ⁿ u[n], then the region of convergence (ROC) of its Z-transform in the Z-plane will be

1. A.​

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Q 23 :

The transfer function of a zero-order - hold system with sampling interval T is 

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Q 24 :

The Fourier transform of a signal h(t) is H(jw) = (2cos w)(sin2w)/w . The value of h (0) is

1. A.1/4
2. B.1/2
3. C.1
4. D.2

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Q 25 :

Let y In] denotes the convolution of h[nI and g[nb where, h[n] = (1/ 2)ⁿ u[n] and g[n] is a causal sequence. If y [0] = 1 and y[1] = 1/2, then g[1] equals

1. A.zero
2. B.1/2
3. C.1
4. D.3/2

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Q 26 :

The input x(t) and output y(t) of a system are related as y(t) = â€‹ The system is

1. A.time invariant and stable
2. B.stable and not time invariant
3. C.time invariant and not stable
4. D.not time invariant and not stable

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Q 27 :

A periodic voltage waveform observed on an oscilloscope across a load is shown. A Permanent Magnet Moving Coil (PMMC) meter connected across the same load reads

1. A.4 V
2. B.5 V
3. C.8 V
4. D.10 V

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Q 28 :

For the circuit shown in the figure, the voltage and current expressions are
V(t) = E1 sin (cot) + f 3 sin(3wt) and I(t) = E1 sin (wt – 1 ) + I3 sin (3cot – 3) + I5sin (5wt)
The average power measured by the Wattmeter is 
​

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Q 29 :

The bridge method commonly used for mutual inductance is

1. A.Heaviside Campbell bridge
2. B.Schering bridge
3. C.De Sauty bridge
4. D.Wien bridge

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Q 30 :

An analog voltmeter uses external multiplier settings. With a multiplier setting of 20 k , it reads 440 V and with a multiplier setting of 80 k , it reads 352 V. For a multiplier setting of 40 k​ the voltmeter reads

1. A.371 V
2. B.383 V
3. C.394 V
4. D.406 V

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Q 31 :

A system with transfer function
​
is excited by sin (wt). The steady-state output of the system is zero at

1. A.w = 1 rad/s
2. B.w = 2rad/s
3. C.w = 3 rad/s
4. D.w = 4 rad/s

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Q 32 :

The state variable description of an LTI system is given by
​
Where Y is the output and u is the input. The system is controllable for ​

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Q 33 :

The feedback system shown below oscillates at 2 rad/s when

1. A.k = 2 and a = 0.75
2. B.k = 3 and a = 0.75
3. C.k = 4 and a = 0.5
4. D.k = 2 and a = 0.5

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Q 34 :

The open - loop transfer function of a unity negative feedback control system is given by â€‹
The gain margin of the system is.

1. A.10.8 dB
2. B.22.3 dB
3. C.34.1 dB
4. D.45.6 dB

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Q 35 :

The open - loop transfer function of negative feedback control system is given by â€‹ The angle θ, at which the root locus approaches the zeroes of the system, satisfies

1. A.​

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Q 36 :

A LED emitting at 1 µm with a spectral width of 50 nm is used in Michelson interferometer. To obtain a sustained interference, the maximum optical path difference between the two arms of the interferometer is

1. A.200 µm
2. B.20 µm
3. C.1µm
4. D.50 nm

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Q 37 :

Light of wavelength 630 nm in vacuum, falling normally on a biological specimen of thickness 10 µm, splits into two beams that are polarized at right angles. The refractive index of the tissue for the two polarizations are 1.32 and 1 .333. When the two beams emerge, they are out of phase by

1. A.0.13^o
2. B.74.3 ^o
3. C.90.0 ^o
4. D.128.6 ^o

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Q 38 :

The responsively of the PIN photodiode shown is 0.9 A/W. To obtain V_out of – 1 V for an incident optical power of 1 mW, the value of R to be used is 
​

1. A.0.9
2. B.1.1 ​
3. C.0.9k ​
4. D.1.1 k ​

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Q 39 :

A double convex lens is used to couple a laser beam of diameter 5 mm into an optical fiber with a numerical aperture of 0.5. The minimum focal length of the lens that should be used in order to focus the entire beam into the fibre is

1. A.1.44 mm
2. B.2.50 mm
3. C.4.33 mm
4. D.5.00 mm

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Q 40 :

If x= ​ ,then the value if Xx is

1. A.e-^​/2
2. B.e^​/2
3. C.x
4. D.1

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Q 41 :

With initial condition x (1) = 0.5, the solution of the differential equation â€‹

1. A.​

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Q 42 :

Given f (z) = If C is a counter clockwise path in the Z-plane such that |z+1| = 1, the value of â€‹ dz is

1. A.-2
2. B.-1
3. C.1
4. D.2

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Q 43 :

A fair coin is tossed till a head appears for the first time. The probability that the number of required tosses is odd, is

1. A.​

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Q 44 :

Given that A =  â€‹ the value of A3 is

1. A.15 A + 12 I
2. B.19 A + 30 I
3. C.17 A + 15 I
4. D.17A + 21 I

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Q 45 :

The direction of vector  is radially outward from the origin, with â€‹ = krn, where r²'= x² + y² + z² and k is a constant. The value of n for which = 0

1. A.- 2
2. B.2
3. C.1
4. D.Zero

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Q 46 :

The maximum value of f (x) = x³ – 9x² + 24x + 5 in the interval [1, 6] is

1. A.21
2. B.25
3. C.41
4. D.46

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Q 47 :

Consider the different equation
 with y (t)  
The numerical value of  is â€‹

1. A.- 2
2. B.- 1
3. C.zero
4. D.1

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Q 48 :

Choose the most appropriate alternative from the Below to complete the following sentence :
​If the tired soldier wanted to lie down, he……… the mattress out on the balcony.

1. A.should take
2. B.shall take
3. C.should have taken
4. D.will have taken

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Q 49 :

If (1.001) ¹²⁵⁹ = 3.52 and (1.001)²⁰⁶² = 7.85, then (1.001)³³²¹ equals

1. A.2.23
2. B.4.33
3. C.11 .37
4. D.27.64

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Q 50 :

One of the parts (A, B, C, D) in the sentence given below contains an error, which one of the following is incorrect ?
​I requested that he should be given the driving test today instead of tomorrow.

1. A.requested that
2. B.should be given
3. C.the driving test
4. D.instead of tomorrow

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