Topics: All categories in the pool
1: A hotel is considered a _______ occupancy.
- commercial
- mercantile
- institutional
- residential
2: Where is the high-side float located on a chiller system?
- liquid line
- inside the chiller barrel
- flash line
- discharge line
3: Before replacing a seized compressor, the _______ should be determinded.
- designed head pressure
- current draw
- cause of seizure
- type of refrigerant
4: Liquid line filter-driers on a 410A system must be rated for no less than
- 1000 psig
- 600 psig
- 400 psig
- 200 psig
5: If two 500 ohm resistors are connected in series, the resistance will be
- 20 ohms
- 200 ohms
- 1000 ohms
- 500 ohms
6: What are the three components of a transformer?
- Contacts, secondary coil, and core
- Primary coil, secondary coil, and core
- Primary core, secondary coil, and high and low voltage connectors.
- Primary coil, secondary coil, and copper contacts
7: Foaming of oil in a compressor is most likely to occur
- when there is insufficient air across the condenser(i.e., dirty coil)
- at start-up
- when the evaporator temperatures are below 32F
- when ambient temperature are low
8: Three-phase motors have what type of windings?
- three start windings
- three run windings
- three run windings and 3 start windings
- one start winding and one run winding.
9: Capacitors are rated in
- kelvins
- volt - amperes
- micro-farads
- megaohms
10: The main cause of enacting the "no vending rule" of July 1st 1992 was
- global warming potential
- ozone depletion
- both a & b
- None of the above
11: What is considered a cooling agent?
- any liquid used for the transmission of heat without vaporization
- any liquid used for the transmission of heat without condensation
- any liquid used for the transmission of heat when condensation occur
- any liquid used for the transmission of heat when vaporization occurs
12: Heat transferred by conduction from one body to another is done
- via liquids
- via radiation
- via heat rays
- via solids
13: If a low-pressure chiller has a low-side leak, which of the following will most likely result?
- Low head pressure and high suction pressure
- High head pressure and low suction pressure
- High suction pressure and high discharge pressure.
- Low suction pressure and low discharge pressure
14: The pressure relief device of a positive displacement compressor shall discharge in the ______________or in accordance with 9.7.8
- high side of the system
- the vapor side of the system
- low side of the system
- the liquid side of the system
15: Two systems using separate refrigerants that are superimposed upon one another is called
- booster
- cascade
- indirect
- single stage
16: R-22 is classified as a ____ refrigerant on the safety matrix.
- B-2
- A-1
- A-2
- B-1
17: Give an example of a secondary coolant?
- R-12
- R-718
- R-717
- R-410A
18: 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.
- 250
- 100
- 350
- 400
19: Copper and its alloys shall not be used with ammonia
- True
- False
20: The density of a gas refers to
- pounds per cubic foot
- pounds per square foot
- pounds per absolute pressure
- cubic feet per pound
21: Two capacitors are wired in parallel. One capacitor has a value of 15uf. The other has a value of 25uf. What is the total value supplied?
- 40 uf
- 15 uf
- 20 uf
- 25 uf
22: How can you test mechanical strength of an electrical connection?
- measure ohms with an electrical meter
- measure voltage across the connection
- attempt to pull the wire from the connector by hand
- none of the above.
23: Pipe identification labels are required when the system contains more than
- 55 lbs
- 120 lbs
- 110 lbs
- 65 lbs
24: The freezing point of water at sea level is?
- 32F
- 32C
- -10C
- 0F
25: The purpose of an accumulator is to
- assure no liquid returns to the compressor
- reduce friction loss to the flow of refrigerant
- store excess refrigerant from the reciver
- filter out impurities from the system