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  #2  
18th November 2014, 10:28 AM
Super Moderator
 
Join Date: Apr 2013
Re: PSU Mechanical Engineering Question Paper

As you want to get the SAIL Mechanical Engineering Question Paper of PSU so here I am giving you some questions of that paper:

1. The unit of force in S.I. unit is
(a) kilogram
(b) newton (Ans)
(c) watt
(d) dyne

2. The unit of work or energy in S.I. unit is
(a) newton
(b) pascal
(c) kilogram metre
(d) joule (Ans)

3. The unit of power in S.I. unit is
(a) newton metre
(b) watt (Ans)
(c) joule
(d) pascal per sec

4. Forces are called concurrent when their line
(a) one point (Ans)
(b) two point
(c) one plane
(d) different planes

5. A force is completely defined when we specify
(a) magnitude
(b) direction
(c) point of application
(d) all the above (Ans)

6. Which of the following is not the unit of distance ?
(a) angstrom
(b) light year
(c) micron
(d) milestone (Ans)

7. Which of the following is not the unit of power ?
(a) kw (kilo watt)
(b) hp (horse power)
(c) k cal/sec
(d) k cal/kg sec (Ans)

8. Which of the following is not the unit of work, energy and heat ?
(a) k cal
(b) kg m (Ans)
(c) kwhr
(d) hp

9. Which of the following is not the unit of pressure ?
(a) kg/cm2
(b) ata
(c) atmosphere
(d) newton (Ans)

10. When trying to turn a key into lock, following is applied
(a) coplanar force
(b) non-coplanar force
(c) lever
(d) couple (Ans)

11. Which of the following is not a scalar quantity ?
(a) time
(b) mass
(c) volume
(d) acceleration

12. Which of the following is a vector quantities ?
(a) energy
(b) mass
(c) momentum (Ans)
(d) speed

13. Which of the following is not vector quantities ?
(a) weight (Ans)
(b) velocity
(c) force
(d) moment

14. The unit of moment of inertia of an area are
(a) kg m2
(b) m4 (Ans)
(c) kg/m2
(d) m3

15. The unit of moment of inertia of mass are
(a) kg m2 (Ans)
(b) m4
(c) kg/m2
(d) m3

16. Which of the following is not the unit of energy ?
(a) kgm
(b) watt (Ans)
(c) K cal
(d) kgm x (m/sec2)

17. Which of the following is the example of lever of first order ?
(a) arm of man
(b) pair of scissors
(c) pair of the clinical tongs
(d) all of the above (Ans)

18. A pair of Smith's Tong's is an example of the lever of
(a) zeroth order
(b) first order
(c) second order (Ans)
(d) third order

19. Tension in a string is maximum at
(a) left support
(b) right support
(c) midway (Ans)
(d) quarter span

20. Which of the following is the unit of energy ?
(a) joules
(b) N-m
(c) electron-volt
(d) all the above (Ans)

21. The product of mass and velocity is known as
(a) work
(b) moment
(c) impulse
(d) momentum (Ans)

22. For a m/c to be self locking its efficiency should be
(a) 100%
(b) >67%
(c) >50% (Ans)
(d) more than 50%

23. A jet engine works on the principle of conservation
(a) energy
(b) mass
(c) linear momentum (Ans)
(d) angular momentum

24. Work is equal to
(a) force x velocity
(b) force x time
(c) force x distance (Ans)
(d) mass x acceleration

25. One N is equal to
(a) 107 dyne (Ans)
(b) 106 dyne
(c) 104 dyne
(d) 103 dyne

26. Rate of change of momentum is proportional to the
(a) displacement
(b) velocity
(c) acceleration (Ans)
(d) impressed force

27. The unit of momentum are same as of
(a) work
(b) energy
(c) force
(d) impluse (Ans)
  #3  
18th March 2015, 12:37 PM
Unregistered
Guest
 
Re: PSU Mechanical Engineering Question Paper

Will you provide me the sample paper of the BHEL engineering trainee exam for Mechanical Engineering candidate , as I am looking fior the same ?
  #4  
18th March 2015, 12:58 PM
Super Moderator
 
Join Date: Mar 2013
Re: PSU Mechanical Engineering Question Paper

As you want I am here providing you sample paper of the BHEL engineering trainee exam for Mechanical Engineering candidate.

Sample paper :

1)Unit of Entropy (J/kg K or kJ/kg K)

2)A mass of 100kg is falling from a height of 1 m and penetrates the sand into for 1 m. What is the resistance force given by sand.

3)Ratio of specific heats of air. (1.41)

4)A body weighs 3 kg in air. If it is submerged in a liquid, it weighs 2.5 kg. What is the specific gravity of the liquid.

5)Two cars travell in same direction at 40 km/hr at a regular distance. A car comes in a opposite direction in 60km/hr. It meets each car in a gap of 8 seconds. What is the distance between them?

6)A simple problem involing in hoops stress. For sphere: M= [3/2]*p*V*[density of pressure vessel material/Maximum working stress it can tolerate] For Thin walled pressure walls: Hoops stress or stress in the radial direction =p*r/2t

7)A problem in force calculation in a body moving in a inclined surface.

8)Composition of bronze. (Copper+zinc)

9)Compostion of stainless steel.(iron+chromium+nickel+carbon)

10)CI is manifactured in which process. (cupola process)

11)What percentage of carbon is preset in pig iron. (4.5 to 6%)

12)Water is available at 10m height. What is the pressure available? (pressure=density*g*height; p=1000*9.81*10; p=98100N/m2)

13)What will happen if the speed of the centrifugal pump doubles.

14)The unit eV is widely used in ? (Nuclear and atomic physics)

15)What will happen to the resistance, when the diameter of the conductor is doubled?

16)The power comsumed by a electrical device is 1000W at 250V, What is the resistance in the device?
(Power= Voltage*current; Current=Power/Voltage, Current,I=1000/250=4
amps. V=IR, Therefore R=250/4=62.5 ohms)

17)Why DC current is not used in transformer.

18)On what principle the sonar/ radar works?

19)Bending moment diagram for the UDL is in what shape?

20)Function of the distributor in petrol vehicles? (Spark timing)

21)Which is not present in CI engines? (carburrettor)

22)What will happen if one cylinder recieves more amount of fuel spray from injectors than other injectors?

23)Purpose of draft tube in hydraulic turbines? (The purpose of a draft tube is toconvert some of the kinetic energy of the flow from the runner (the rotating part of the turbine) intopressure energy and thereby increase the efficiency ofthe hydro power turbine.)

24)What is the effect or reheater in the gas turbine? (The advantage of reheater is significantly increased thrust; the disadvantage is it has very high fuel consumption and inefficiency)

25)Problems involving with fricition coefficient.

26)Factor of safety = Yeild stress/Working stress.

27)Which is the example of non parallel power transmission (Universal coupling)

28)For perpendicular shafts worm gear is used.

29)A planet gear with 25 teeth is meshed with a sun gear of 100 teeth. Both are connected using a arm. How many rotations are needed for planet gear to complete one rotation around the sun gear?

30)What is equivalent spring constant for spring in parallel?

31) Some questions was asked related to boundry layer and vortex flow.

32) 5 questions were asked in PERT, Process planning, Product planning, Break even analysis.

33)How are tungsten and sintered composite materials are machined? (Electro Discharge Machining, EDM)


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