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You Are On Multi Choice Question Bank SET 3219
160951. In a flooded evaporator which of the following types of expansion, device is employed :(A)float valvecr
(A): float valve (B): capillary tube (C): automatic expansion valve (D): thermostatic expansion valve
160952. In an ice plant the function of brine agitator is :
(A): to increase COP (B): to reduce compressor power (C): to obtain uniform temperature (D): to super heat the refrigerant gas
160953. In an air conditioning system the comfort conditions are defined by:
(A): 15°C DBT 90% RH (B): 25°C DBT 35% RH (C): 20°C DBT 80% RH (D): 22°CDBT60% RH
160954. The electrical component of automobile air conditioner allows to engage and disengage the compressor from the thermostat:
(A): Rheostat (B): Thermostat (C): Fuse (D): Magentic clutch
160955. Sum of atmospheric pressure and gauge pressure is called :
(A): Total pressure (B): Absolute pressure (C): Normal pressure (D): Natural pressure
160956. The diode used for voltage regulation is :
(A): Rectifier diode (B): Signal diode (C): Zener diode (D): Vari cap diode
160957. The specific humidity is the mass of water vapour present in :
(A): 1 kg of dry air (B): 1 m3 of dry air (C): 1 ms of wet air (D): 1 kg of wet air
160958. Which one of the following oxy fuel gas flames has the highest flame temperature?
(A): Oxy hydrogen (B): Oxy acetylene flame (C): Oxy coal gas flame (D): Oxy LPG flame
160959. A micrometer has a positive error of 0.02 MM. What is the correct reading when micrometer measures 25.37 MM :
(A): 25.35 MM (B): 25.43MM25.43 MM (C): 25.39 MM (D): 26.41 MM
160960. One micron of vacuum is equal to:
(A): O.lMM Hg (B): 0.01 MM Hg (C): 0.001 MM Hg (D): 0.0001 MM Hg
160961. Start the compressor without relay to short:
(A): C and S terminal (B): S and R terminal (C): C and R terminal (D): Compressor body and S terminalCompressor body and S terminal
160962. There is no relay and starting capacitor in :
(A): CSR circuit (B): CSIR circuit (C): RSIR circuit (D): PSC circuit
160963. Stabilizer used for 1.0 TR AC is :
(A): 2 KVA (B): 3 KVA (C): 5 KVA (D): 4 KVA
160964. Select the period of interval for a defrost cycle in a frost free refrigerator :
(A): once in 12hours (B): once in 24 hours (C): once in 36hours (D): once in 48 hours
160965. Select the boiling point of refrigerant 134 A at 1 atmosphere :
(A): -31.5°C (B): -29.8°C (C): -26.1°C (D): -11.8°C
160966. Most important property of insulating material is :
(A): odourless (B): easy to handle (C): light in weight (D): low conductivity
160967. The component which control the bimetal thermostat is:
(A): Defrost heater (B): Fan motor (C): Overload protector (D): P.T.C. Relay
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