1. A body is resting on a plane inclined at an angle of 30° to horizontal. What force would be required to slide it down, if the coefficient of friction between body and plane is 0.3?
(a) 5 Kg (b) 1 Kg
(c) zero (d) 0.5 Kg
2. Compression members tend to buckle in the direction of
(a) least radius of gyration (b) axis of load
(c) perpendicular to axis of load (d) minimum cross section
3. A fluid jet discharging from 150 mm diameter orifice has a diameter of 100 mm at its vena contracta. The coefficient of contraction is
(a) 0.44 (b) 1.24
(c) 0.24 (d) 0.64
4. The escape velocity on the surface of the earth is
(a) 11.2 km/s (b) 1 km/s
(c) 3.6 km/s (d) 8.8 km/s
5. The heat to be supplied to a Carnot engine operating between 800 K and 400 K and producing 100 kJ of work is
(a) 100 kJ (b) 200 kJ
(c) 300 kJ (d) 400 kJ
6. A piece of wood having weight of 10 kg floats in water with 60% its volume under the liquid. Determine the specific gravity of wood
(a) 0.6 (b) 0.83
(c) 0.4 (d) 0.3
7. If all the dimension of a prismatic bar be increased in the ratio of k:1, then maximum stress produced in the bar due to its own weight will increase in the following ratio
(a) 1:k (b) $k^2:1$
(c) $k^3:1$ (d) k:1
8. A house requires 60M cal/hr in winter for heating. Heat pump absorbs heat from cold air outside and requires 8M cal/hr of work. The COP will be
(a) 0.75 (b) 7.5
(c) 6.5 (d) 10
9. A body moves, from with a constant acceleration of 5 m/s2. The distance covered in 10 sec is most nearly
(a) 200 m (b) 300 m
(c) 250 m (d) 500 m
10. A cold storage plant of 20 tonne of refrigerator capacity operates between 200 and 300 K. The power required to run the plant if the plant has half COP of a Carnot cycle (Tonne of refrigerator = 3.5 kW) is
(a) 50 kW (b) 60 kW
(c) 70 kW (d) 80 kW
11. Two cars are 10 km apart and moving in the same direction at speed of 40 km/hr. A car moving in opposite direction meets these cars at interval of 10 minutes. At what speed the other car is moving?
(a) 40 km/hr (b) 25 km/hr
(c) 30 km/hr (d) 20 km/hr
12. Diagram factor is defined as the ratio of
(a) theoretical m.e.p. and actual m.p.e.
(b) actual m.e.p. and theoretical m.e.p.
(c) theoretical m.e.p. and swept volume
(d) swept volume and theoretical m.e.p.
13. A liquid compressed in a cylinder has a volume of 0.04 $m^3$ at 100 $kg/cm^2$ and a volume of 0.39 $m^3$ at 200 $kg/cm^2$. The bulk modulus of elasticity of liquid is
(a) 200 m (b) 300 m
(c) 250 m (d) 500 m
Answer: Excluded from Evaluation
14. The equation $(p + \frac{a}{v^2})(v-b) = R$ is known as
(a) Real gas equation
(b) Vander Waal's equation
(c) Maxwell's equation
(d) Avogadro's equation
15. Tumbling is the process of
(a) increasing fatigue limit
(b) imparting luster to surface
(c) cleaning the surface of small parts
(d) improving the creep limit
16. In ElectroIux refrigeator
(a) ammonia is absorbed in hydrogen
(b) ammonia is absorbed in water
(c) ammonia is absorbed in hydrogen
(d) hydrogen evaporates in ammonia
17. According to theorem of perpendicular axes, if Ixx and Iyy be the M.I. of a lamina about xx and yy axis, then M.I. of the lamina about axis zz, which is perpendicular tp xx and yy equal to
(a) $I_{xx} * I_{yy}$ (b) $I_{xx} + I_{yy}$
(c) $\frac{I_{xx}}{I_{yy}}$ (d) $\frac{ I_{yy}}{I_{xx}}$
18. A perfect gas at 27° C is heated at constant pressure till its volume is double. The final temperature is
(a) 54 ° C (b) 654 ° C
(c) 108 ° C (d) 327 ° C
19. The value of acceleration due to gravity at moon is g/6, where g is the value of acceleration due to gravity at earth. The value of frequency of oscillation of simple pendulum on moon as compared to earth will be
(a) $\frac{1}{\sqrt{6}}$ times (b) 6 times
(c) 1/6 times (d) $\sqrt{6}$ times
20. Maximum shear stress in a Mohr's circle is
(a) less than the radius of Mohr's circle
(b) greater than the radius of Mohr's circle
(c) equal to radius of Mohr's circle
(d) None
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