Download AppGovt. JobsFree G.K. & Current AffairsScholarshipBlog
Free PracticeContact
📚 Exam by Category
▾
Objective Questions

Latest DSSSB JE Exam Question (Objective Questions), MCQ in English

Subjects : Mechanical, English Language & Comprehension

Question Bank DSSSB JE Exam TIER 2 (Mechanical) - English
Back to Exam

Mechanical

Question 1Single Answer
Which of the following is the unit of kinematic viscosity _________________?
  1. A
    Pascal
  2. B
    Poise
  3. C
    Stoke
  4. D
    Faraday
  5. E
    None of the above
Question 2Single Answer
Consider the following processes:
1. Extension of a spring
2. Plastic deformation of a material
3. Magnetization of a material exhibiting hysteresis
Which of the above process are irreversible?
  1. A
    1 and 2 only            
  2. B
    1 and 3 only
  3. C
    1 only                        
  4. D
    1, 2 and 3
Question 3Single Answer
Which of the following statements are correct for a throttling process?
1. It is an adiabatic steady flow process
2. The enthalpy before and after throttling is same
3. In the processes, due to fall in pressure, the fluid velocity at outlet is always more than inlet velocity
  1. A
    1 and 2 only            
  2. B
    1 and 3 only
  3. C
    2 and 3 only                        
  4. D
    1, 2 and 3
Question 4Single Answer
A Reversed Carnot Engine removes 50 kW from a heat sink. The temperature of the heat sink is 250 K and the temperature of the heat reservoir is 300 K. The power required of the engine is
  1. A
    10 kW      
  2. B
    20 kW
  3. C
    30 kW    
  4. D
    50 kW
Question 5Single Answer
A heat engine receives heat at the rate of 2500 kJ/min and gives an output of 12.4 kW. Its thermal efficiency is, nearly
  1. A
    18%                        
  2. B
    23%
  3. C
    26%                        
  4. D
    30%
Question 6Single Answer
One reversible heat engine operates between 1000 K and T2 K and another reversible heat engine operates between T2K and 400 K. If both the engines have the same heat input and output, then the temperature T2 must be equal to
  1. A
    582.7 K                   
  2. B
    632.5 K
  3. C
    682.8 K                   
  4. D
    732.5 K
Question 7Single Answer
Consider the following statements for isothermal process:
1. Change in internal energy is zero
2. Heat transfer is zero
Which of the above statements is/are correct?
  1. A
    1 only                     
  2. B
    2 only
  3. C
    Both 1 and 2           
  4. D
    Neither 1 nor 2
Question 8Single Answer
A system of 100 kg mass undergoes a process in which its specific entropy increases from 0.3 kJ/kg K to 0.4 kJ/kg K. At the same time, the entropy of the surroundings decreases from 80 kJ/K to 75 kJ/K. The process is:
  1. A
    Reversible and isothermal
  2. B
    Irreversible
  3. C
    Reversible only
  4. D
    Isothermal only
Question 9Single Answer
Which one of the following statements is correct during adiabatic charging of an ideal gas into an empty cylinder from a supply main?
  1. A
    The specific enthalpy of the gas in the supply main is equal to the specific enthalpy of the gas in the cylinder
  2. B
    The specific enthalpy of the gas in the supply main is equal to the specific internal energy of the gas in the cylinder
  3. C
    The specific internal energy of the gas in the supply main is equal to the specific enthalpy of the gas in the cylinder
  4. D
    The specific internal energy of the gas in the supply main is equal to the specific internal energy of the gas in the cylinder
Question 10Single Answer
Consider the following systems :
1. An electric heater
2. A gas turbine
3. A reciprocating compressor
The steady flow energy equation can be applied to which of the above systems?
  1. A
    1 and 2 only            
  2. B
    1 and 3 only
  3. C
    1, 2 and 3                
  4. D
    2 and 3 only
Question 11Single Answer
Consider the following motions :
1. Piston reciprocating inside an engine cylinder
2. Motion of a shaft between foot-step bearings
Which of the above can rightly be considered as successfully constrained motion?
  1. A
    1 only                     
  2. B
    2 only
  3. C
    Both 1 and 2           
  4. D
    Neither 1 nor 2
Question 12Single Answer
A rotor weighing 2 kN is supported on bearings A and B which are 1 m apart. The centre of mass of the rotor is at a distance 0.4 m from bearing A. It is observed that there is an unbalanced couple of magnitude 300 N-m which leaves the shaft balanced statically.The dynamic reactions at the supports will be
  1. A
    800 N and 800 N
  2. B
    300 N and 800 N
  3. C
    800 N and – 300 N
  4. D
    300 N and – 300 N
Question 13Single Answer
A cam is a mechanical member used to impart a desired motion to a follower by direct contact. Which one of the under-listed follower motion types will produce the least jerk to the system?
  1. A
    Simple harmonic
  2. B
    Constant acceleration and deceleration
  3. C
    Constant velocity
  4. D
    Cycloidal
Question 14Single Answer
In a circular are cam with a roller follower, acceleration of the follower depends on
1. cam speed and location of centre of circular arc
2. roller diameter and radius of circular arc
Which of the above is/are correct?
  1. A
    1 only                     
  2. B
    2 only
  3. C
    Both 1 and 2           
  4. D
    Neither 1 nor 2
Question 15Single Answer
A manufacturing company is selling a product for 15 per unit with variable cost of  10 per unit. The fixed cost of the asset is 50,000. How many units should be produced to breakeven?
  1. A
    2000                       
  2. B
    5000
  3. C
    8000                       
  4. D
    10000
Question 16Single Answer
Hot wire anemometer is used to measure_______________?
  1. A
    discharge            
  2. B
    velocity of gas
  3. C
    pressure intensity of gas
  4. D
    pressure intensity of liquid
Question 17Single Answer
A gear of 28 cm pitch circle diameter has 40 teeth. The circular pitch will nearly be
  1. A
    11 mm/tooth            
  2. B
    22 mm/tooth
  3. C
    33 mm/tooth            
  4. D
    44 mm/tooth
Question 18Single Answer
Consider the following statements regarding gear tooth designing for gear drive :
1. Tooth profiles not designed as per ‘law of gearing’ will cause vibration and impact problems even at low speed.
2. As the gears go through their mesh, the pitch point must remain stationary on the line of centres.
3. In a correctly designed tooth profile, the line of action of successive instantaneous points of contact will pass through the stationary pitch point.
Which of the above statements are correct?
  1. A
    1, 2 and 3                
  2. B
    1 and 2 only
  3. C
    1 and 3 only                        
  4. D
    2 and 3 only
Question 19Single Answer
The flywheel of a steam engine has a radius of gyration of 1 m and mass 2000 kg. The starting torque of the engine is 2000 N-m. The kinetic energy of the flywheel after 10 seconds from start is
  1. A
    75 kN-m                  
  2. B
    100 kN-m
  3. C
    125 kN-m                 
  4. D
    150 kN-m
Question 20Single Answer
Consider two shafts connected with two gears as per the following options :
1. One on each shaft.
2. Through an intermediate gear mounted on an intermediate shaft, and every shaft having one gear only.
3. Through an intermediate gear mounted on an intermediate shaft having two gears, whereas the other shafts have one gear each
Which of the above represent(s) a simple gear train?
  1. A
    1 only                     
  2. B
    1 and 2 only
  3. C
    2 and 3 only                        
  4. D
    1, 2 and 3
Question 21Single Answer
A spherical waterdrop of 1 mm in diameter splits up in air into 64 smaller drops of equal size. The surface tension coefficient of water in air is 0.073 N/m. The work required in splitting up the drop is
  1. A
    0.96 × 10–6 J            
  2. B
    0.69 × 10–6 J
  3. C
    0.32 × 10–6 J            
  4. D
    0.23 × 10–6 J
Question 22Single Answer
Consider the following statements pertaining to stability of floating bodies:
1. A floating body will be stable when the centre of gravity is above the centre of buoyancy.
2. The position of metacentres corresponding to different axes of rotation are generally different for the same floating object.
3. For cargo ships, the metacentric height varies with loading.
Which of the above statements are correct?
  1. A
    1, 2 and 3                
  2. B
    1 and 2 only
  3. C
    1 and 3 only                        
  4. D
    2 and 3 only
Question 23Single Answer
Water is coming out from a tap and falls vertically downwards. At the tap opening, the stream diameter is 20 mm with uniform velocity of 2 m/s. Assuming steady inviscid flow, constant pressure atmosphere everywhere, and neglecting curvature and surface tension effects, the diameter of the stream 0.5 m below the tap opening is nearly
  1. A
    11.7 mm                  
  2. B
    14.6 mm
  3. C
    17.5 mm                  
  4. D
    20.4 mm
Question 24Single Answer
Consider the following statements:
1. At low Reynolds numbers of any flow, viscous forces dominate over inertial forces.
2. Transition from laminar to turbulent flow occurs over a range of Reynolds numbers depending on the surface presented to the flow.
Which of the above statements is/are correct?
  1. A
    1 only                     
  2. B
    2 only
  3. C
    Both 1 and 2           
  4. D
    Neither 1 nor 2
Question 25Single Answer
In a steady laminar flow of a given discharge through a circular pipe of diameter D, the head loss is proportional to
  1. A
    D–1                          
  2. B
    D–2
  3. C
    D–3                          
  4. D
    D–4
Question 26Single Answer
The centre-line velocity in a pipe flow is 2m/s. What is the average flow velocity in the pipe if the Reynolds number of the flow is 800?
  1. A
    2 m/s                       
  2. B
    1.5 m/s
  3. C
    1 m/s                      
  4. D
    0.5 m/s
Question 27Single Answer
During a constant pressure expansion of a gas, 33.3% heat is converted into work while the temperature rises by 20 K. The specific heat of the gas at constant pressure as a proportion of work, W is
  1. A
    8%                          
  2. B
    10%
  3. C
    12%                        
  4. D
    15%
Question 28Single Answer
A system of 100 kg mass undergoes a process in which its specific entropy increases from 0.3 kJ/kg K to 0.4 kJ/kg K. At the same time, the entropy of the surroundings decreases from 80 kJ/kg K to 75 kJ/kg K. The process is
  1. A
    reversible and isothermal
  2. B
    irreversible
  3. C
    reversible only
  4. D
    isothermal only
Question 29Single Answer
A reversible heat engine rejects 80% of the heat supplied during a cycle of operation. If the engine is reversed and operates as a refrigerator, then its coefficient of performance shall be
  1. A
    6                             
  2. B
    5
  3. C
    4                             
  4. D
    3
Question 30Single Answer
For the same efficiency of the Brayton cycle and the Carnot cycle working between temperature limits of Tmax and Tmin, the power contribution of the Brayton cycle will be
  1. A
    zero            
  2. B
    maximum
  3. C
    minimum
  4. D
    50% of the Carnot cycle
Question 31Single Answer
A fin will be more effective when Bio number is
  1. A
    Greater than 1
  2. B
    Equal to 1
  3. C
    Between 1 and 3
                   4        4
  4. D
    Less than 1
Question 32Single Answer
A tank of length, breadth and height in the ratio of 2:1:2 is full of water. The ratio of hydrostatic force at the bottom to that at any larger vertical surface is
  1. A
    1
  2. B
    2
  3. C
    3
  4. D
    4
Question 33Single Answer
Which of the following fluids exhibit a certain shear stress at zero shear strain rate followed by a straight line relationship between shear stress and shear strain rate?
  1. A
    Newtonian fluid 
  2. B
    Ideal Bingham plastic fluids
  3. C
    Pseudo-plastic fluids
  4. D
    Dilatent fluids
Question 34Single Answer
What is the specific gravity of a marble stone, which weighs 400N in air, and 200N in water? (g=10m/s2)
  1. A
    8
  2. B
    6
  3. C
    4
  4. D
    2
Question 35Single Answer
What is the intensity of pressure in the following SI units, when specific gravity of mercury is 13.6 and the intensity of pressure is 400KPa ?
  1. A
    0.3 bar or 4.077m of water or 0.29 mm of Hg
  2. B
    4 bar or 5.077m of water or 0.399 mm of Hg
  3. C
    0.3 bar or 5.077m of water or 0.599 mm of Hg
  4. D
    4 bar or 4.077m of water or 0.299 mm of Hg
Question 36Single Answer
Consider the following statements:
1.If a small upward displacement is given to a floating body, it results in the reduction of the buoyant force acting on the body
2.A slight horizontal displacement does not change either the magnitude or the location of the buoyant force 
Which of the above statements is/are correct? 
  1. A
    Both 1 and 2
  2. B
    1 only 
  3. C
    2 only
  4. D
    Neither 1 nor 2 
Question 37Single Answer
State whether following flow field is physically possible? 
  1. A
    Possible for steady, incompressible flow
  2. B
    Possible for unsteady, incompressible flow
  3. C
    Possible for steady, compressible flow 
  4. D
    Not Possible 
Question 38Single Answer
In a differential manometer, a head of 0.5 m of fluid A in limb 1 is found to balance a head of 0.3 m of fluid B in limb 2. The atmospheric pressure is 760 mm of mercury. The ratio of specific gravities of A to B is
  1. A
    0.25
  2. B
    0.26
  3. C
    2
  4. D
    4
Question 39Single Answer
A Reversed Carnot Engine removes 50 kW from a heat sink. The temperature of the heat sink is 250 K and the temperature of the heat reservoir is 300 K. The power required of the engine is
  1. A
    10 kW 
  2. B
    20 kW
  3. C
    30 kW
  4. D
    50 kW
Question 40Single Answer
On which of the following just in time manufacturing philosophy emphasizes ?
  1. A
    man power
  2. B
    profit
  3. C
    inventory
  4. D
    manufacturing
Question 41Single Answer
In a stream line steady flow, two points A and B on a stream line are 1m apart and the flow velocity varies uniformly from 2m/s to 5m/s. What is the acceleration of fluid at B?
  1. A
    3 m/s2
  2. B
    6 m/s2
  3. C
    9 m/s2
  4. D
    15 m/s2
Question 42Single Answer
The stream function is given by Ψ = 3xy, then the velocity at the point (2,3) is
  1. A
    9
  2. B
    -6
  3. C
    117
  4. D
    10.8
Question 43Single Answer
The boundary layer thickness at a given distance from the leading edge of a flat plate is
  1. A
    More for lighter fluid
  2. B
    More for denser fluid
  3. C
    Less for denser fluid
  4. D
    Less for lighter fluid
Question 44Single Answer
In a laminar flow through a circular pipe, the discharge varies
  1. A
    Linearly with fluid density
  2. B
    Inversely with pressure drop
  3. C
    Directly as square of pipe radius
  4. D
    Inversely with fluid velocity
Question 45Single Answer
A fluid is flowing over a flat plate. At distance of 8 cm from the leading edge, the Reynolds number is found to be 25600. The thickness of the boundary layer at this point is
  1. A
    1.5mm
  2. B
    2.5mm
  3. C
    4.0mm
  4. D
    5.0mm
Question 46Single Answer
Air is flowing over a flat plate with a free stream velocity of 24 m/s, and its kinematic viscosity is 72 ×10-6m2/s. If at a particular point, the Reynolds number is 30000, its location from the leading edge is
  1. A
    0.05m 
  2. B
    0.07m
  3. C
    0.08m
  4. D
    0.09m
Question 47Single Answer
In a refrigerator, the evaporator and condenser coil temperatures are –33°C and 27°C, respectively. Assuming that the maximum COP is realized, the required power input for a refrigerating effect of 4 kW is
 
  1. A
    8 kW     
  2. B
    4 kW
  3. C
    2 kW    
  4. D
     1 kW
Question 48Single Answer
In a hydraulic coupling
  1. A
    The magnitudes of input and output torques are equal
  2. B
    The magnitudes of input torque is greater than output torque
  3. C
    The magnitudes of input torque is less than output torque
  4. D
    The magnitudes of input torque is negligible as compared to output torque 
Question 49Single Answer
Consider the following statements:
1.The wheel can be operated freely in air
2.Pressure at the exit of the nozzle is atmospheric
3.Pressure does not vary along the moving vanes
4.Change the direction of momentum imparts thrust over moving vanes Which of the following statements are applied to impulse turbine?
  1. A
    1,2 and 3 only
  2. B
    1,2 and 4 only
  3. C
    3 and 4 only
  4. D
    1,2, 3 and 4 
Question 50Single Answer
A water jet 0.0015m2in area issues from a nozzle with 15 m/s velocity. It is made to impinge perpendicular on to a plate that moves away from the jet with a velocity of 5 m/s. The force on the plate due to this impact is
  1. A
    150 N
  2. B
    1470 N
  3. C
    340 N
  4. D
    900 N
Important Questions Package

DSSSB JE Exam Online Question Bank Package

Buy DSSSB JE Important Questions, MCQ, question answer in Hindi & English. It will help you to score high marks in DSSSB JE question bank 2026 in Online, PDF & Print study material.

+ Free Monthly Current Affairs, GK & more PDF Download
Sr.Package NameAmount
1.DSSSB JE Exam TIER 1 (Electrical) - Hindi
Description : 1000 Question with Answer.
₹101 [₹500]
2.DSSSB JE Exam TIER 1 (Electrical) - Hindi
Description : 2000 Question with Answer.
₹151 [₹500]
3.DSSSB JE Exam TIER 1 (Electrical) - Hindi
Description : 3000 Question with Answer.
₹181 [₹500]
4.DSSSB JE Exam TIER 1 (Mechanical) - Hindi
Description : 2000 Question with Answer.
₹151 [₹500]
5.DSSSB JE Exam TIER 1 (Mechanical) - Hindi
Description : 1000 Question with Answer.
₹101 [₹500]
6.DSSSB JE Exam TIER 1 (Mechanical) - English
Description : 4000 Question with Answer.
₹201 [₹500]
7.DSSSB JE Exam TIER 2 (Electrical) - Hindi
Description : 1000 Question with Answer.
₹101 [₹500]
8.DSSSB JE Exam TIER 1 (Mechanical) - English
Description : 3000 Question with Answer.
₹181 [₹500]
9.DSSSB JE Exam TIER 1 (Mechanical) - English
Description : 2000 Question with Answer.
₹151 [₹500]
10.DSSSB JE Exam TIER 1 (Mechanical) - English
Description : 1000 Question with Answer.
₹101 [₹500]
11.DSSSB JE Exam TIER 2 (Mechanical) - Hindi
Description : 3000 Question with Answer.
₹181 [₹500]
12.DSSSB JE Exam TIER 1 (Mechanical) - English
Description : 3000 Question with Answer.
₹181 [₹500]
13.DSSSB JE Exam TIER 1 (Mechanical) - English
Description : 4000 Question with Answer.
₹201 [₹500]
14.DSSSB JE Exam TIER 2 (Mechanical) - Hindi
Description : 1000 Question with Answer.
₹101 [₹500]
15.DSSSB JE Exam TIER 2 (Mechanical) - Hindi
Description : 2000 Question with Answer.
₹151 [₹500]
16.DSSSB JE Exam TIER 2 (Mechanical) - English
Description : 2000 Question with Answer.
₹151 [₹500]
17.DSSSB JE Exam TIER 2 (Electrical) - Hindi
Description : 2000 Question with Answer.
₹151 [₹500]
18.DSSSB JE Exam TIER 1 (Electrical) - English
Description : 1000 Question with Answer.
₹101 [₹500]
19.DSSSB JE Exam TIER 2 (Electrical) - English
Description : 3000 Question with Answer.
₹181 [₹500]
20.DSSSB JE Exam TIER 2 (Mechanical) - English
Description : 1000 Question with Answer.
₹101 [₹500]
21.DSSSB JE Exam TIER 2 (Mechanical) - English
Description : 3000 Question with Answer.
₹181 [₹500]
22.DSSSB JE Exam TIER 2 (Electrical) - English
Description : 2000 Question with Answer.
₹151 [₹500]
23.DSSSB JE Exam TIER 2 (Electrical) - English
Description : 1000 Question with Answer.
₹101 [₹500]
24.DSSSB JE Exam TIER 1 (Electrical) - English
Description : 4000 Question with Answer.
₹201 [₹500]
25.DSSSB JE Exam TIER 1 (Electrical) - English
Description : 3000 Question with Answer.
₹181 [₹500]
26.DSSSB JE Exam TIER 1 (Electrical) - English
Description : 2000 Question with Answer.
₹151 [₹500]
27.DSSSB JE Exam TIER 1 (Electrical) - English
Description : 1000 Question & Answer Download in PDF (Send by Email)
₹151 [₹450]
28.DSSSB JE Exam TIER 1 (Electrical) - Hindi
Description : 1000 Question & Answer Download in PDF (Send by Email)
₹151 [₹450]
29.DSSSB JE Exam TIER 2 (Electrical) - English
Description : 1000 Question & Answer Download in PDF (Send by Email)
₹151 [₹450]
30.DSSSB JE Exam TIER 2 (Electrical) - Hindi
Description : 1000 Question & Answer Download in PDF (Send by Email)
₹151 [₹450]
31.DSSSB JE Exam TIER 1 (Mechanical) - Hindi
Description : 1000 Question & Answer Download in PDF (Send by Email)
₹151 [₹450]
32.DSSSB JE Exam TIER 1 (Mechanical) - English
Description : 1000 Question & Answer Download in PDF (Send by Email)
₹151 [₹450]
33.DSSSB JE Exam TIER 2 (Mechanical) - Hindi
Description : 1000 Question & Answer Download in PDF (Send by Email)
₹151 [₹450]
34.DSSSB JE Exam TIER 2 (Mechanical) - English
Description : 1000 Question & Answer Download in PDF (Send by Email)
₹151 [₹450]
35.DSSSB JE Exam TIER 1 (Electrical) Question Bank Book - Hindi
Description : 1000 Question with Answer (Printed Material)
₹450 [₹800]
36.DSSSB JE Exam TIER 2 (Electrical) Question Bank Book - Hindi
Description : 1000 Question with Answer (Printed Material)
₹450 [₹800]
37.DSSSB JE Exam TIER 1 (Mechanical) Question Bank Book- Hindi
Description : 1000 Question with Answer (Printed Material)
₹450 [₹800]
38.DSSSB JE Exam TIER 2 (Mechanical) Question Bank Book- Hindi
Description : 1000 Question with Answer (Printed Material)
₹450 [₹800]
39.DSSSB JE Exam TIER 1 (Electrical) Question Bank Book - English
Description : 1000 Question with Answer (Printed Material)
₹390 [₹600]
40.DSSSB JE Exam TIER 2 (Electrical) Question Bank Book - English
Description : 1000 Question with Answer (Printed Material)
₹390 [₹600]
41.DSSSB JE Exam TIER 1 (Mechanical) Question Bank Book - English
Description : 1000 Question with Answer (Printed Material)
₹390 [₹600]
42.DSSSB JE Exam TIER 2 (Mechanical) Question Bank Book - English
Description : 1000 Question with Answer (Printed Material)
₹390 [₹600]
Back to Exam