ISRO Mechanical Engg.: Thermodynamics Booster Quiz 2

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Question 1

The supply of working fluid to the engine to suit the load conditions is controlled by

• AMeyer’s expansion valve
• BD-Slide value
• CGovernor
• DThrottle valve

Question 2

One made of a monoatomic gas is taken through a cycle ABCD as shown in the P-V diagram. Column II give the characteristics involved in the cycle. Match the process A B with the professes given in column II.

Column – I
A. Process
B. Process
C. Process
D. Process
Column – II
(p) Internal energy decreases
(q) Internal energy increases
(r) Heat is lost
(s) Heat is gained
(t) Work is done on the gas
Process signifies

• Ap, q
• Br, s
• Cp, r, t
• Dq, t

Question 3

In case of ideal triatomic gas, the ratio of specific heats C_p / C_v would be

• A1
• B1.33
• C1.40
• D1.41

Question 4

A wire is plastically deformed bent by supplying a force of 40 N over a distance of 0.8 m. (The force moves in the direction in which the distance is measured). If the wire has a mass of 0.2 kg and a specific heat of 0.5 kJ/kg. estimate the maximum increase in the average temperature of the wire

• A0.03
• B0.3
• C3
• D30

Question 5

A perfect gas at 27 °C is heated at constant pressure till its volume is double. The final temperature is

• A54 °C
• B108 °C
• C327 °C
• D600 °C

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