Topics: All categories in the pool
1: A restaurant is classified as a
- public assembly occupancy
- commercial occupancy
- mixed occupancy
- large mercantile occupancy
2: What type of oil is used in R-410A systems?
- mineral oil
- polyalkylene glycol (PAG)
- naphthene
- polyolester (POE)
3: The two float-type metering devices are the
- liquid float and the low-side float
- vapor float and the low-side float.
- high-side float and the low-side float
- liquid float and the vapor float
4: RPM's of a centrifugal compressor are at approximately?
- 15,000
- 500
- 30,000
- 10,000
5: If the compression ratio on a centrifugal compressor rises too high, the compressor will stop pumping and make a loud sound commonly referred to as a
- purge
- merge
- surge
- splurge
6: Setting a pressure relief device shall not exceed ___ of the design pressure
- 75%
- 80%
- 90%
- 100%
7: Pressure relief valves shall be marked with the data from
- Section I Division VIII of ASME Boiler & Pressure Code
- Section IV Division of the ASME Boiler & Pressure Code
- Section VIII Division of the ASME Boiler & Pressure Code
- Section XIII Division of the ASME Boiler & Pressure Code
8: The instrument used to measure the specific gravity of absorption chiller solutions is the
- Psychrometer
- refractometer
- hydrometer
- anemometer
9: A relief valve discharge capacity is rated in
- Pounds of air per minute.
- temperature minus pounds of air per second divided by release rate squared
- PSIA
- PSIG
10: A single pole-double throw switch uses how many wires?(excluding the ground)
- 2
- 3
- 4
- 5
11: Can you use Ammonia in industrial applications?
- No, never
- Yes, always
- Yes, Under certain condidtions
- When mixed with R-718
12: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere
- 110
- 1,000
- 6.6
- 330
13: How is bring measured?
- anemometer
- hydrometer
- hygrometer
- manometer
14: The location of the thermal bulb for the TXV on the evaporator effects
- both the pressure and temperature in the feeler bulb
- the amount of superheat required to operate the TXV
- the amount of liquid in the evaporator
- the amount of gas in the evaporator
15: What is not a requirement of a Class T machine room?
- Automatic ventilation
- Fire hose connected to the building fire protection system.
- Self-closing doors
- Tight fitting doors
16: In an air conditioning plant which an indirect low side, water is used inside of bring: the proper sequence of operating the plan is
- start the fan and circulating pump
- reset the safety valve
- reset the expansion valve
- start the comrpessor
17: Adjusting the spring pressure on a TXV
- changes subcooling
- changes superheat
- makes no difference
- adjusts the bulb charge
18: Refrigerants shall be classified by
- color codes
- toxicity and flammability
- maximum permissible quantities of each group
- requirements for commercial, industrial, and residential occupancies
19: Class A refrigerants are considered
- non-toxic
- toxic
- non-flammable
- flammable
20: How would you know if there was a loss of crankcase pressure?
- oil level will rise
- oil will foam
- oil will thin out
- oil will thicken
21: A premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space such as auditoriums, ballrooms, classrooms, passenger depots, restaurants, and theaters is considered a(n)
- public assembly occupancy
- institutional occupancy
- commercial occupancy
- illegal occupancy
22: The equivalent length of pipe in a water piping system is
- the total length of pipe plus equivalent of fittings multiplied by 2.31
- the total length of pipe as you would measure it
- the total length of pipe plus equivalent-length of fittings
- the total length of pipe as you would measure it plus 25% for fittigns
23: A plug containing an alloy that will melt at a specific temperature to relief pressure is a
- rupture plug
- relief plug
- fusible plug
- fusion plug
24: How far from the ground does a relief valve need to be?
- Not more than 3' above grade
- At least 25' above grade
- At least 15' above grade
- At least 20' above grade
25: System design pressures must take into consideration, not only, pressures found during normal operation but also what?
- When it's cold out
- When there is a malfunction on the high side
- When its warm out
- All of the above