1. What is the temperature for which the vapour pressure of a substance is equal to 760 mm of Hg termed as ?

Triple point

Normal boiling point

Normal pressure point

Normal vapour point

Answer: Normal boiling point

Explanation:


2. What happens when the heat supplied to the system is more than the work transfer out of the system ?

Constant internal energy

Decrease in internal energy

Increase in internal energy

Internal energy cannot be determined

Answer: Increase in internal energy

Explanation:


3. The degree of disorder when two gases are mixed is ________ ?

less than that of individual gases

higher than that of individual gases

unpredictable compared to individual gases

same as that of the individual gases

Answer: higher than that of individual gases

Explanation:


4. A Carnot heat pump is used to maintain a room at a temperature of 27°C , the initial temperature of the room was -4°C . The heat loss from the room is 20 kW. What is the power requirement of the pump ?

1

2

3

4

Answer: 2

Explanation:


5. Which equation best represents the entropy (s) of a system with two parts with entropy x and y respectively ?

s = x+y

s = x-y

s < x+y

s > x+y

Answer: s = x+y

Explanation:


6. Which of the following cycle is used in spark ignition (SI) engine ?

Carnot cycle

Diesel cycle

Dual cycle

Otto cycle

Answer: Otto cycle

Explanation:


7. Which cycle has heat addition process carried at both constant pressure and constant volume ?

Carnot cycle

Diesel cycle

Dual cycle

Otto cycle

Answer: Dual cycle

Explanation:


8. Which of the following factors contribute towards detonation in an engine ?

Engine overheating

High compression ratio

Lean fuel mixture

All option are correct

Answer: All option are correct

Explanation:


9. What is the state of meeting of saturated liquid lines with respect to vapourization and saturated vapour line on a P-V diagram of pure substance called ?

Critical state

Saturation state

Superheated vapour state

Vapourization state

Answer: Critical state

Explanation:


10. Which below stated statement is INCORRECT about a reservoir of heat ?

It has a constant temperature

It is also known as thermal bath

It has an infinite heat capacity

There exist no real heat reservoirs

Answer: There exist no real heat reservoirs

Explanation: