GATE Mechanical Engineering Test Paper 2 Online Question Answers

1. The number of stress co-efficients or constants which characterize a piezoelectric material is:

2. A mass 'm' attached to a light string oscillates with a period of 2 sec. If the mass is increased by 2 kg, the period increases by 1 sec. The value of 'm' is

3. For a reversed Carnot cycle, which figure represented the variation of T₂ for different values of cop for a constant value of T_H = 300 K (say)?

4. A stop watch time study on an operator with a performance rating of 120 yielded a time of 2 minutes. If allowance of 10% of the total available time all to be given, the standard time of the operation is:

5. The series S = 1 - 1 + 1 - 1 ... is

6. The conductivity of a metal at ultraviolet frequency (10¹⁴ HZ) approximately equals:

7. Morse test can be used on:

8. In a circular pipe the diameter is doubled abruptly. If the velocity head of flow in the pipe before enlargement is 'h' then the energy loss of the sudden enlargement will be equal to:

9. Which one of the following is a proper representation of pressure differential (Y-axis) Vs velocity of air (X-axis) at the throat of a carburetor?

10. A heat pump working on a reversed carnot cycle has a c.o.p of 5. Its work as a refrigerator taking 1 kW of work input, the refrigerating effect will be:

11. For helical gears the helix angle generally ranges from:

12. The compression members tend to buckle in the direction of their:

13. The specific heat of concentrated orange juice is 5.8 kilo-joules per kg^oC. How much heat must be removed to cool 3.0 kilograms of juice from 30^oC to 0.0^oC?

14. The structure shown in the given figure is stable if:

15. Water is floating with a flow rate of 0.002 m³/s. What is its average velocity at an outlet where the area is 4 cm²?

16. Which one of the theories given below is related to the theory of the thermocouple?

17. A bulb is switched off. What of the following describes the rate of dissipation of heat?

18. In a point-to-point type of NC system:

19. In 'plasma' state a gas:

20. The expression du = CvdT is valid for:

21. The relation between tool life (T) and cutting speed (V) is expressed as:

A) V + nT = C

B) T + nV = C

C) VTⁿ = C

D) TVⁿ = C

22. In a piezoelectric crystal oscillator, the oscillation or turning frequency is linearly proportional to the:

23. A bar 4 cm in diameter is subjected to an axial load of 4t. The extension of the bar over a guage length of 20 cm is 0.03 cm. The decrease in diameter is 0.0018 cm, the Poisson' s ratio is:

24. Gas used for carburising is:

25. When a real gas undergoes joule-Thomson expansion, the temperature:

26. The use of Refrigerant-22 (R-22) for temperatures below - 30^oC is not recommended due to:

27. A steel having ferrite and pearlite is:

28. In the given figure, the maximum bending moment at the fixed end of the cantilever caved by the UDL is M. The bending moment at a section 1/5 from the free end is:

29. A stone of mass 1 kg is tied to a string of 1 m length and whirled in a horizontal circle at a constant angular speed of 5 rad/s. The tension (in Newtons) in the string will be:

30. In Rankines formula for columns the value of constant (a) is taken as 1/750 for:

31. A force F of 800 N is applied as shown. What maximum weight W can be supported? Neglect the weight of the piston.

32. The end deflection to the contilever with a couple acting at the end as shown in figure, is

A) ML²/2EI

B) ML²/8EI

C) 2ML²/EI

D) ML/4EI

33. The following figure refers to a channel section of uniform thickness of 1 cm used as a beam with the cross-sectional dimension shown in cm unit. If the momment of inertia of channel I_XX be equal to 246 cm⁴ and C be the shear centre, then the value of e in cm is equal to:

34. The inlet and exit velocity diagram of a turbomachine rotor are shown in the given figure. The turbomachine is:

35. A 1 in. x 1 in. x 1 in. copper cube was heated to 90^oC. It was thrown into a lake of 10^oC. After steady state is reached, how much heat was released? (Note that copper = 0.386 kJ/kg^oK)

36. The B.H. curves are shown in the figure. The curve X, Y and Z refer respectively to:

37. A spring controlled givernor is found unstable it can be made stable by:

38. Euler's law is applicable to:

39. Temperature near absolute zero are obtained using:

40. In the statement "an eccentric mass rotating at 300 rpm will create X times more unbalanced force than 50% of the same mass rotating at 300 rpm. 'X' stands for: