A. becomes hotter
B. becomes cooler1
C. remains at the same temperature
D. may become hotter or cooler depend-ing upon the humidity of the surround¬ing air
E. attains atmospheric temperature
Related Mcqs:
- A gas is compressed in a cylinder by a movable piston to a volume one-half its original volume. During the process 300 kJ heat left the gas and internal energy remained same. The work done on gas in Nm will be___________________?
A. 300 Nm
B. 300,000 Nm
C. 30 Nm
D. 3000 Nm
E. 30,000 Nm - Specific heat of air at constant pressure is equal to___________________?
A. 0.17
B. 0.21
C. 0.24
D. 1.0
E. 1.41 - On weight basis, air contains following parts of oxygen_________________?
A. 21
B. 23
C. 25
D. 73
E. 79 - On volume basis, air contains following parts of oxygen _____________________?
A. 21
B. 23
C. 25
D. 77
E. 79 - The specific heat of air increases with increase in __________________?
A. temperature
B. pressure
C. both pressure and temperature
D. variation of its constituents
E. air flow - The following cycle is used for air craft refrigeration___________________?
A. Brayton cycle
B. Joule cycle
C. Carnot cycle
D. Bell-Coleman cycle
E. Reversed-Brayton cycle - The ratio of two specific heats of air is equal to____________________?
A. 0.17
B. 0.24
C. 0.1
D. 1.41
E. 2.71 - Which of the following quantities is not the property of the system__________________?
A. pressure
B. temperature
C. specific volume
D. heat
E. density - If heat be exchanged in a reversible manner, which of the following property of the working substance will change accordingly_________________?
A. temperature
B. enthalpy
C. internal energy
D. entropy
E. all of the above - According to Clausis statement of second law of thermodynamics___________________?
A. heat can’t be transferred from low temperature source to high temperature source
B. heat can be transferred for low temperature to high temperature source by using refrigeration cycle.
C. heat can be transferred from low temperature to high temperature source if COP of process is more than unity
D. heat can’t be transferred from low temperature to high temperature source without the aid of external energy
E. all of the above
