Related Questions

If a truck can carry 10 to 16 boxed refrigerators, then what is the least number of refrigerators that 4 trucks can carry?
A 40
B 52
C 48
D 64
The refrigerant used for absorption refrigerators working on heat from solar collectors is a mixture of water and
A Carbon dioxide
B Sulphur dioxide
C Lithium bromide
D R-12
Steady state temperature reached by a small amount of liquid evaporating into a large amount of unsaturated vapour-gas mixture is called the __________ temperature.
A Dry-bulb
B Wet-bulb
C Dew point
D Adiabatic saturation
__________ temperature is the steady state temperature attained by a small amount of liquid evaporating into a large quantity of unsaturated gas-vapor mixture.
A Dry bulb
B Wet bulb
C Dew point
D None of these
The refrigerant after condensation process is cooled below the saturation temperature before throttling. Such a process is called
A Sub-cooling or under-cooling
B Super-cooling
C Normal cooling
D None of these
For water evaporating into usaturated air under adiabatic conditions and at constant pressure, the __________ remains constant throughout the period of vaporisation.
A Dry bulb temperature
B Wet bulb temperature
C Humidity
D Relative saturation
In a heat exchanger with one fluid evaporating or condensing, the surface area required is least in
A Parallel flow
B Counter flow
C Cross flow
D All of these
Spray dryer for evaporating milk to produce milk powder is made of
A Lead lined steel
B Stainless steel
C Aluminium
D Cast iron
Most air cooled condensers are designed to operate with a temperature difference of
A 5°C
B 8°C
C 14°C
D 22°C
Refrigerators keep food unspoiled because ---
A at its low temperature, bacteria and moulds are inactive
B at its low temperature, the germs are killed
C at its low temperature, the germs are frozen
D it sterilizes the food

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