Industrial refrigerant machine operators seem to be simple people within the production chain but essentially are very important. Take up the quiz below and see how good you are as a refrigerant machine operator. This test consists of 100 most important questions that will help you clear the certification exam of the same. All the best.
DAMAGE TO FAN BLADES
INCREASE IN COOLING TOWER WATER TEMP BEING RETURNED
DECREASE IN MAKEUP WATER REQUIREMENTS
A DROP IN WET BULB TEMP
7.7
0.6
5.9
23.5
HEAD PSI DROPPING TO LOW
DECREASE THE CAPACITY OF THE COMPRESSOR AND REFRIGERATION SYSTEM
NON-CONDENSABLES ARE MORE PRONE TO COLLECT IN THE SYSTEM
FROST MAY DEVELOP IN THE SUCTION LINE
INDIRECT SYSTEMS
DIRECT SYSTEMS
INDIRECT CLOSED SYSTEMS
INDRIECT OPEN SYSTEMS
FILTER SUCTION AND DISCHARGE VALVES
SUCTION VALVE AND DISCHARGE BYPASS BOTH OPEN
SUCTION BYPASS AND DISCHARGE VALVE BOTH OPEN
DISCHARGE BYPASS AND SUCTION VALVE BOTH CLOSED
DECREASE IN SUPER HEAT TEMP ENTERING COMPRESSOR
AN INCREASE IN COMPRESSOR HEAD PRESSURE
AN INCREASE IN THE FLOW RATE OF NONCONDENSABLES
CONDENSER TO METERING DEVICE FROZEN
NOT ENOUGH REFRIGERANT IN SYSTEM
EXPANSION VALVE OPEN TOO WIDE
THE COMPRESSOR IS RUNNING CONTINUALLY
COMPRESSOR VALVES ARE LEAKING
80°F
90°F
110°F
130°F
A1
B2
A3
B1
HIGH PRESSURE GAS AND LEAVES AS LOW PRESSURE LIQUID
HIGH PRESSURE GAS AND LEAVES AS HIGH PRESSURE LIQUID
SUPERHEATED GAS AND LEAVES AS HIGH TEMPERATURE LIQUID
HIGH TEMPERATURE GAS AND LEAVES AS SUPERHEATED GAS
GROUP 1
GROUP 2
GROUP 3
GROUP 4
REDUCE BY 1/2
INCREASE BY A FACTOR OF 2
STAY THE SAME
INCREASE BY A FACTOR OF 4
WATER, OIL, REFRIGERANT
OIL, REFRIGERANT, WATER
REFRIGERANT, OIL, WATER
OIL, WATER, REFRIGERANT
1204
1002
1808
1406
32
28
40
18
DOUBLE INDIRECT OPEN SPACE SYSTEMS
SYSTEMS OPERATING BELOW ATMOSPHERIC PRESSURE
ABSORPTION COMPRESSORS
OUTSIDE AIR DAMPERS
VAPOR RECYCLING UNIT
AN ECONOMIZER
REFRIGERANT CLEANER
EVAPORATOR
CONDENSER
ECONOMIZER
COMPRESSOR DISCHARGE
EVAPORATOR
REDUCING PRESSURE
RAISING PRESSURE
REGULATING PRESSURE
STABILIZING PRESSURE
A REDUCTION ON BOTH THE WATER FLOW RATE AND PRESSURE INTO THE CONDENSER
A REDUCTION IN TOTAL FLOW RATE TO CONDENSER
A REDUCTION IN WATER PRESSURE AT THE CONDENSER INLET
FOR THE PUMPS TO COMPENSATE TO MAINTAIN BOTH THE FLOW RATE AND DISCHARGE PRESSURE
1.2 OF DESIGN PRESSURE (AT LEAST)
THE RUPTURE GUARD HAS TO BE REPLACED ALSO
THE GAUGE HAS TO BE A COMPOUND GAUGE
THE GAUGE SHOULD BE GRADUATED TO PRESSURE
INSPECTION SHOULD BE MADE FOR DIRTY TEV STRAINER
PARTIALLY CLOGGED DISCHARGE LINE
CHECK COMPRESSOR WIRING, FOR OVERLOADED EQUIPMENT
ADDITIONAL REFRIGERANT BE CHARGED
PRESSURE FITTING
GAS TIGHT FITTING
START TO MELT AT 400°F
START TO MELT AT 500°F
RE-ADJUST THE TEV SUPERHEAT SETTING
DEACTIVATE THE FREEZE STAT
RAISE THE COMPRESSOR DISCHARGE OPERATING PRESSURE
LOWER THE COMPRESSOR SUCTION OPERATING PRESSURE
LOW CORRESPONDING COMPRESSOR DISCHARGE TEMP
LOW VISCOSITY
LOW LATENT HEAT
LOW CORRESPONDING OPERATING PRESSURE