If atmospheric temperature and dew point are nearly equal, then the relative humidity is_______________?

A. d ln p/dt = Hvap/RT2
B. d ln p/dt = RT2/Hvap
C. dp/dt = RT2/Hvap
D. dp/dt = Hvap/RT2

A. 0
B. < 0
C. < 1
D. > 1

A. Air cycle
B. Carnot cycle
C. Ordinary vapour compression cycle
D. Vapour compression with a reversible expansion engine

A. Pressure must be kept below 5.2 atm
B. Temperature must be kept above – 57°C
C. Pressure must be kept below 5.2 atm. and temperature must be kept above 57°C
D. Pressure and temperature must be kept below 5.2 atm. and – 57°C respectively

A. Entropy
B. Temperature
C. Enthalpy
D. Pressure

A. Unity
B. Activity
C. Both A. & B
D. Neither A. nor B