Q101
Open questionThe lowest thermal diffusivity is of
Select an option to see the answer and solution.
Mechanical Engineering · all questionsRefrigeration And Air Conditioning
Refrigeration And Air Conditioning
practice.
Practice every MCQ with options. Use Show answers when you want the correct option and solution.
285
Questions
6/15
Page
Pick an option on a question to see the right answer and solution.
Q102
Open questionThe central air conditioning system has ___________ overall efficiency as compared to individual systems.
Select an option to see the answer and solution.
Q103
Open questionFor air conditioning the operation theater in a hospital, the percentage of outside air in the air supplied is
Select an option to see the answer and solution.
Q104
Open questionThe vapour compression refrigerator employs the following cycle
Select an option to see the answer and solution.
Q105
Open questionThe atmospheric air at dry bulb temperature of 15°C enters a heating coil maintained at 40°C. The air leaves the heating coil at 25°C. The bypass factor of the heating coil is
Select an option to see the answer and solution.
Q106
Open questionDuring heating and humidification, the final relative humidity of air
Select an option to see the answer and solution.
Q107
Open questionThe thermostatic expansion valve is used in ________ type of evaporators.
Select an option to see the answer and solution.
Q108
Open questionIn a psychrometric process, the sensible heat added is 30 kJ/s and the latent heat added is 20 kJ/s. The sensible heat factor for the process will be
Select an option to see the answer and solution.
Q109
Open questionA pressure gauge on the discharge side of a refrigerant compressor reads too high. The reasons will be
Select an option to see the answer and solution.
Q110
Open questionThe change in evaporator temperature in a refrigeration cycle, as compared to change in condenser temperature, influences the value of C.O.P.
Select an option to see the answer and solution.
Q111
Open questionChoose the wrong statement
Select an option to see the answer and solution.
Q112
Open questionIn a refrigeration system, the expansion device is connected between the
Select an option to see the answer and solution.
Q113
Open questionThe human body feels comfortable when the heat stored in the body is
Select an option to see the answer and solution.
Q114
Open questionThe emissivity of a polished silver body is _________ as compared to black body.
Select an option to see the answer and solution.
Q115
Open questionRelative humidity is given by (where pv = Partial pressure of water vapour, pb = Barometric pressure, ps = Pressure of saturated air, pd = Pressure at dry bulb temperature, pw = Saturation pressure corresponding to wet bulb temperature and = Degree of saturation)
Select an option to see the answer and solution.
Q116
Open questionIn which of the following refrigeration system, waste heat can be effectively used?
Select an option to see the answer and solution.
Q117
Open questionEnvironmental protection agencies advice against the use of chlorofluorocarbon refrigerants since
Select an option to see the answer and solution.
Q118
Open questionThe comfort conditions in air conditioning are at (where DBT = Dry bulb temperature, and RH = Relative humidity)
Select an option to see the answer and solution.
Q119
Open questionIn a vapour absorption refrigeration system, the compressor of the vapour compression system is replaced by
Select an option to see the answer and solution.
Q120
Open questionWhich of the following statement is correct?
Select an option to see the answer and solution.