THERMO DYNAMICS QUSTION ANSWER

THERMO DYNAMICS QUSTION ANSWER

1. All the commercial liquid fuels are derived from natural petroleum (or crude oil).
A. True
B. False
Answer: Option A


2. A cycle consisting of one constant pressure, one constant volume and two isentropic processes is known as
A. Carnot cycle
B. Stirling cycle
C. Otto cycle
D. Diesel cycle
Answer: Option D


3. The efficiency and work ratio of a simple gas turbine cycle are
A. low
B. very low
C. high
D. very high
Answer: Option B


4. The amount of heat required to raise the temperature of the unit mass of gas through one degree at constant volume, is called
A. specific heat at constant volume
B. specific heat at constant pressure
C. kilo Joule
D. none of these
Answer: Option A

5. There is a loss of heat in an irreversible process.
A. True
B. False
Answer: Option A

6. When the gas is heated at constant volume, the heat supplied increases the internal energy of the gas.
A. True
B. False
Answer: Option A


7. Which of the following is the lightest and most volatile liquid fuel?
A. Gasoline
B. Kerosene
C. Fuel oil
Answer: Option A

8. Work done by a system is taken to be
a) positive
b) negative
c) zero
d) varies according to situation

Answer: a
Explanation: In thermodynamics, work done by a system is take to be positiv

9.3. Work done on a system is taken to be

a) positive
b) negative
c) zero
d) varies according to situation

Answer: b

Explanation: In thermodynamics, work done on a system is take to be negative.

10.Work is a

a) point function
b) path function
c) depends on the state
d) none of the mentioned

Answer: b
Explanation: Amount of work done depends on the path the system follows.