1. Unit of work is
(A) Newton
(B) Newton-meter
(C) Joule
(D) both b and c
2. Pressure of 1 Pa is equal to
(A) 1 bar
(B) 10 bar
(C) 1 N/m²
(D) 1 atm
3. First law of thermodynamics deals with
(A) Conservation of heat
(B) Conservation of momentum
(C) Conservation of mass
(D) Conservation of energy
4. The level of heat intensity is called
(A) Enthalpy
(B) Pressure
(C) Temperature
(D) Both b and c
5. Atmospheric pressure is equal to
(A) 101.3 kN/m²
(B) 1.013 bar
(C) All of these
(D) 760 mm of Hg
6. 4500 K is equal in centigrade scale
(A) 273°C
(B) 1770°C
(C) 2500°C
(D) All of these
7. 25°C is equal to
(A) 3000 K
(B) 273 K
(C) 4600 K
(D) 298 K
8. Absolute pressure is the pressure measured by pressure gauge above the
(A) Atmospheric pressure
(B) Absolute pressure
(C) Vacuum pressure
(D) Gauge pressure
9. One horse power is equal to
(A) 0.746 kW
(B) 0.756 kW
(C) 0.726 kW
(D) 0.736 kW
10. The energy possessed by a body by virtue of its motion is
(A) Potential energy
(B) Heat energy
(C) Internal energy
(D) Kinetic energy
11. Centigrade scale is obtained by dividing the range of temperature between freezing points of water into
(A) 180 equal parts
(B) 212 equal parts
(C) 100 equal parts
(D) 273 equal parts
12. The capacity to do work is called
(A) Energy
(B) Efficiency
(C) Power
(D) Work
13. Boiling point of water at atmospheric pressure is
(A) 100°C
(B) Both a and b
(C) 373 K
(D) None of these
14. A system which does not permit any transfer of mass across its boundary but permits energy is called
(A) Closed system
(B) Open system
(C) Isolated system
(D) All of these
15. The unit of power is
(A) Joule
(B) Newton
(C) Both a and b
(D) Watt
16. The unit of temperature in SI system is
(A) Centigrade
(B) Fahrenheit
(C) Rankin
(D) Kelvin
17. Rate of doing work is called
(A) Energy
(B) Enthalpy
(C) Power
(D) Entropy
18. When the gas is heated, the part of heat energy which is stored in the gas and raises its temperature is called
(A) Potential energy
(B) Internal energy
(C) Kinetic energy
(D) Specific heat
19. The mathematical equation of 1st law of thermodynamics is
(A) Q = W − ΔU
(B) W = Q + ΔU
(C) Q = W
(D) Q = W + ΔU
20. The internal energy of a substance depends upon
(A) Volume
(B) Mass
(C) Temperature
(D) Work