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You Are On Multi Choice Question Bank SET 3216
160801. The refrigerant enters in the condenser by the :
(A): top side (B): last coillast coil (C): bottom side (D): middle tubemiddle tube
160802. One ton refrigeration is equal to:
(A): 210 kj/min (B): 12600 kj/hour (C): 3.5 kj/sec (D): all of the above
160803. Liquid charged in thermostatic expansion valves sensing bulb is :
(A): alcohol (B): same refrigerant (C): mercury (D): nitrogen
160804. Solenoid valve operated by :
(A): electrically (B): hand (C): gas pressure (D): oil pressure
160805. The colour of the flame of halide torch in case of leakage of Freon refrigerant will change to:
(A): yellow (B): redred (C): bright green (D): orange
160806. Which type of valve is used in a reciprocating refrigeration compressor?
(A): rotary valve (B): poppet valve (C): ring plate (D): glob valve
160807. The presence of frost on the cooling coils of the evaporator of a refrigeration system :
(A): increases the compressor pressure (B): act as the insulator and decreases the heat transfer rate (C): makes the compressor run for comparatively short durations (D): reduce the life of cooling coils
160808. Dry ice is :
(A): solidified carbondioxide (B): ice free from dissolved air and gases (C): ice free from impurities (D): ice made from transparent distilled water
160809. Which of the following machines can be used to obtain refrigeration at places where there is no electric power?
(A): air refrigeration (B): steam jet refrigeration (C): vapour compression (D): vapour absorption
160810. Rectifiers are used for converting :
(A): voltage into current (B): AC to DC (C): DC to AC (D): voltage in to velocity
160811. The operation theatre in a hospital is to be air conditioned suggest the percentage of outside air being circulated in the theatre :
(A): zero (B): 50 (C): 20 (D): 100
160812. The difference between D.B.T. and W.B.T. is called:
(A): wet bulb depression (B): dew point depression (C): effective temperature (D): adiabatic saturation temperature
160813. The absolute zero temperature corresponds on the condition when :
(A): all the substances exit only as solids (B): volume of a gas reduces to zero (C): kinetic energy of ga9 molecules become zero (D): no pressure is exerted by the gas
160814. The oil used with 134 A refrigerant is :
(A): Mineral oil (B): Capilla D (C): Polyol ester oil (D): Lubricating oil
160815. Cripser temperature of refrigerator is equal to :
(A): 0°C (B): 8°C (C): -5°C (D): None of the above
160816. Dehydrator is installed in the :
(A): liquid line (B): discharge line (C): suction line (D): charging linecharging line
160817. The device which used to find relative humidity :
(A): Pyrometer (B): Anemometer (C): Hydrometer (D): Hygrometer
160818. Chemical name of Freon 22 is :
(A): Dichloro difiuoro methane (B): Monochloro difluoro methane (C): Trichloro monofluoro methane (D): Dichloro monofluoro methane
160819. The capacity of visible cooler is expressed in :
(A): cubic feet (B): litres (C): k.cal/TR (D): tons of refrigeration
160820. HFC 134 A appliance has capillary length when compare to CFC unit:
(A): 10% to 20% more (B): 20% short (C): 50% longer (D): same length
160821. The effectiveness of the cooling tower is dependent on :
(A): Dry bulb temperatureof theair (B): Direction of theflow of air (C): Wet bulb temperatureof theair (D): None of the above
160822. Milky white ice obtained if:
(A): impurities are present in' water (B): due to the presence of C02 (C): by keeping in an insulated chamber (D): air is present in it
160823. In a shell and coil condenser:
(A): water flows in the shell and refrigerant in the coil (B): only refrigerant flows through the shell as well as coil (C): only water flows through the shell as well as coil (D): water flows in the coil and the refrigerant in the shell
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