Topics: All categories in the pool
1: Mercury was used in thermometers primarily because it
- was inexpensive
- vaporizes at very high temperatures
- expands uniformly
- never freezes
2: The two float-type metering devices are the
- liquid float and the vapor float
- high-side float and the low-side float
- vapor float and the low-side float.
- liquid float and the low-side float
3: What device should be used on low-temperature freezers?
- high capacity TXV
- discharge muffler
- oil separator
- hot-gas by-pass
4: How many opening forces operate a thermostatic expansion valve?
- 3
- 4
- 2
- 1
5: A split-phase motor has a ______ winding and a ____ winding
- start, common
- duel-run, duel-start
- run, common
- run, start
6: Crankcase heaters are energized
- to allow easy compressor start-up
- while the compressor is running
- to prevent compressor freeze-up
- when the compressor is off
7: The instrument used to measure the specific gravity of absorption chiller solutions is the
- refractometer
- Psychrometer
- hydrometer
- anemometer
8: Insurance companies shall forward each inspection report of all refrigeration or A/C systems to the Chief of Inspections within
- 2 months
- 1 week
- 14 days
- 30 days
9: A thermometer inside a duct measures ____ heat.
- latent
- hidden
- sensible
- specific
10: How many flammability classifications are refrigerants in?
- 5
- 2
- 7
- 3
11: Large Mercantile occupancy is a premise or that portion of a premise where more than ____ persons congregate on levels above or below the street level to purchase personal merchandise.
- 100
- 400
- 350
- 250
12: What is R-22?
- HFC
- Chlorodifluoromethane
- CCFCM
- Chlorofluoromethane
13: "P" represents ______ in the Watt's law formula
- voltage
- watts
- reactance
- amperage
14: What type of voltage cause a potential relay to open?
- 24 volt supply from the thermostat
- 120 volt line voltage
- Pick-up voltage
- none of the above
15: Refrigerant piping crossing an open space that affords passageway in any building shall not be less than _____ feet above the floor unless piping is located against the ceiling.
- 8'4"
- 9.00'
- 7.25'
- 7.00'
16: In designing duct work, pressure and ______ need to be considered
- length
- CFM
- duct sealant used
- all of the above
17: Large mercantile occupancy is
- a premise or that portion of a premise where more than 1500 persons congregate on levels above or below street level to purchase personal merchandise
- a premise of that portion of a premise where more than 100 persons congregate on levels above of below street level to purchase personal merchandise.
- a premise of that portion of a premise where more than 50 persons congregate on levels above of below street level to purchase personal merchandise.
- a premise or that portion of a premise where more than 200 persons congregate on levels above or below street level to purchase personal merchandise
18: Suction valve unloaders afford an effective means of
- evaporator control
- superheat control
- capacity control
- refrigerant control
19: Pressure relief valves shall be marked with the data from
- Section IV Division of the ASME Boiler & Pressure Code
- Section VIII Division of the ASME Boiler & Pressure Code
- Section I Division VIII of ASME Boiler & Pressure Code
- Section XIII Division of the ASME Boiler & Pressure Code
20: Institutional occupancy is
- a premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space.
- a premise or that portion of a premise from which, because they are disabled, debilitated, or confined, occupants cannot readily leave without the assistance of others.
- a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
- None of the above
21: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.
- 80%
- 99%
- 75%
- 90%
22: Copper and its alloys shall not be used with ammonia
- True
- False
23: What is the purpose of suction/discharge traps?
- to ensure proper oil return to the compressor
- to keep oil inside the evaporator for proper oil return to the compressor
- to keep oil inside of the accumulator for proper return to the compressor
- all of the above
24: The start winding has _____ turns than the run winding.
- more
- less
- the same
- none of the above
25: Where would the EPR valve be located on a multiple evaporator system?
- outlet of low temperature evaporator
- outlet of the liquid line
- inlet of the low temperature evaporator.
- outlet of high temperature evaporator