Kerala PSC Previous Years Question Paper & Answer
Page:15
Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name 'AC Plant Operator' And exam conducted in the year 2023. And Question paper code was '148/2023/OL'. Medium of question paper was in Malayalam or English . Booklet Alphacode was ''. Answer keys are given at the bottom, but we suggest you to try answering the questions yourself and compare the key along wih to check your performance. Because we would like you to do and practice by yourself.
D:-All of these
Correct Answer:- Option-B
Question75:-What is the reason for excess cooling on ice cubes in an ice candy
plant?
A:-More refrigerant charging
B:-Thermostat not working
C:-High atmospheric temperature
D:-High compressor pressure
Correct Answer:- Option-B
Question76:-Which instrument is used to check the specific gravity of brine solution
in ice plant?
A:-Humidifier
B:-Hydrometer
C:-Pyrometer
D:-Hygrometer
Correct Answer:- Option-B
Question77:-Why ammonia is used as a common refrigerant in an ice plant?
A:-High vapour density
B:-Low evaporator pressure
C:-Low critical pressure
D:-High latent heat value
Correct Answer:- Option-D
Question78:-Which expansion device is used in walk in coolers?
A:-Thermostatic expansion valve
B:-High side float valve
C:-Capillary tube
D:-Low side float valve
Correct Answer:- Option-A
Question79:-What is the reason for stop the compressor motor due to LP cut out
switch in cold storage plant?
A:-High discharge pressure
B:-High evaporator pressure
C:-Low discharge pressure
D:-Low evaporator pressure
Correct Answer:- Option-D
Question80:-Which process will be done during hot gas defrosting?
A:-Heater on