Topics: All categories in the pool
1: A motor is rated for 120 volts and has a RLA (rated-load amps) of 5 amps. What is the wattage of the motor?
- 5KW
- 746 watts
- 600 watts
- 1000 watts
2: R-12. R-22, and R-40 are considered Group I refrigerants.
- True
- False
3: Which oil is hydoscopic?
- animal
- SW30
- polyolester
- mineral
4: R-22 is considered a(n)
- HCFC
- CFC
- HFC
- HCFCH
5: Booster compressors connect to the ____ side of the compressor
- vapor
- liquid
- low side
- oil side
6: What measures gas pressure?
- Hydrometer
- Barometer
- Hygrometer
- Manometer
7: The 4 basic methods of determining whether the proper amount of refrigerant is being introduced into the system are
- sight glass, weight, pressure, and dipstick
- Buss-eye, weight, pressure, and frost line
- sight glass, weight, pressure, and frost line
- sight glass, weight, paper method, and frost line.
8: A “U” or “UM” marking a on a nameplate of a pressure vessels signifies compliance with Section VIII of
- the ASME Boiler and Pressure Vessel Code
- Section 11.3.1.5 ASHRAE 15 Standard
- the ANSI Standard 10.7.2
- both the ANSI Standard 10.7.2 and ASHRAE 15 Standard 11.3.1.5
9: Refrigerant is metered into the evaporator on a large centrifugal chiller thru the
- low side of the system
- high side float assembly
- cap tube
- none of the above
10: What pipe can not be used for refrigeration?
- N
- L
- K
- M
11: A micron is
- one thousandths of a millimeter
- one millonths of a centimeter
- a larger unit of measurement than Hg
- one millonths of a micrometer
12: Refrigeration piping before being buried shall be
- leak tested
- encased in pipe duct
- pressure tested
- All of the above
13: A restaurant is classified as a
- mixed occupancy
- commercial occupancy
- public assembly occupancy
- large mercantile occupancy
14: Ammonia (NH3) is a group III refrigerant
- True
- False
15: 1 Watt = ______ BTU's?
- 12
- 4.482
- 7.216
- 3.412
16: Pressure vessels of 10 cubic feet or more gross volume shall use
- at least one rupture member
- a dual pressure-relief valve if charging into the atmosphere
- at least three means of discharge and/or rupture discs
- both a and b are correct
17: The discharge relief valve is located (9.4.6)
- on top of the condensor
- between the compressor and oil separator
- between the compressor and reciever
- between the compressor and the stop valve
18: Capacitors are rated in
- kelvins
- volt - amperes
- micro-farads
- megaohms
19: Pressure vessels nameplate markings must be compliant with the
- ASHRAE 34 Standards
- CMR-588 & CMR-528
- ASME Boiler and Pressure Vessel Code
- All of the Above
20: A multi-evaporator refrigeration system uses what type of valve to maintain evaporating temperatures?
- EPR valve
- CPR valve
- EEV
- Solenoid valve
21: Which of the following is a drop-in for R-22
- R-410A
- R-134A
- R407C
- None of the above
22: What is Trichlorotrifluoromethane?
- R-12
- R-13
- R-113
- R-11
23: A class B1 refrigerant is considered
- non-toxic and non-flammable
- non-toxic but highly flammable
- toxic and somewhat flammable
- toxic but non-flammable
24: The equivalent length of pipe in a water piping system is
- the total length of pipe plus equivalent-length of fittings
- the total length of pipe as you would measure it plus 25% for fittigns
- the total length of pipe as you would measure it
- the total length of pipe plus equivalent of fittings multiplied by 2.31
25: What is R-22?
- Chlorodifluoromethane
- Chlorofluoromethane
- HFC
- CCFCM