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.Management Sciences
Category: Thermodynamics
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
Addition of heat at constant pressure to a gas results in________________?
A. raising its temperature
B. raising its pressure
C. raising its volume
D. raising its temperature and doing external work
E. doing external work
Carnot cycle is__________________?
A. a reversible cycle (ft) an irreversible cycle
C. a semi-reversible cycle
D. a quasi static cycle
E. an adiabatic irreversible cycle
If a certain amount of dry ice is mixed with same amount of water at 80°C, the final temperature of mixture will be__________________?
A. 80°C
B. 0°C
C. 40°C
D. 20°C
E. 60°C
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
Carnot cycle efficiency is maximum when______________?
A. initial temperature is 0°K
B. final temperature is 0°K
C. difference between initial and final temperature is 0°K
D. final temperature is 0°C
E. initial temperature is minimum possible
The unit of length in S.I. units is________________?
A. meter
B. centimeter
C. kilometer
D. millimeter
For reversible adiabatic process, change in entropy is_________________?
A. maximum
B. minimum
C. zero
D. unpredictable
E. negative.
According to Dalton’s law, the total pres sure of the mixture of gases is equal to________________?
A. greater of the partial pressures of all
B. average of the partial pressures of all
C. sum of the partial pressures of all
D. sum of the partial pressures of all divided by average molecular weight
E. atmospheric pressure
The ideal efficiency of a Brayton cycle without regeneration with increase ni pressure ratio will_________________?
A. increase
B. decrease
C. remain unchanged
D. increase/decrease depending on application
E. unpredictable
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