Topics: All categories in the pool
1: Walls and doors of a machinery room shall be at least _____ hour(s) fire rated.
- 5
- 2
- 1
- 3
2: The main purpose of the accumulator is to
- provide space for vapor to accumulate
- store liquid refrigerant
- provide space for the accumulation of oil and containminants
- prevent liquid slugs at the compressor
3: Booster compressors connect to the ____ side of the compressor
- low side
- oil side
- vapor
- liquid
4: What would be the classification of a church?
- Industrial
- Place of assembly
- Institutional
- Large mercantile
5: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?
- Foot valve
- Moisture indicator
- Stop valve
- Muffler
6: The main purpose of a refrigerant detector in a machinery room is to
- inform there is a refrigerant leak int he system
- detect toxins in the air caused by a refrigerant leak
- to set off an alarm when there is refrigerant present inside the room
- all of the above
7: The first step in mechanical refrigeration is
- expansion
- compression
- evaporation
- condensation
8: "I" represents _______ in the Watt's law formula.
- amperage
- voltage
- reactance
- watts
9: It takes how many BTU's of latent heat/hr to boil 1 lbs of water into steam?
- 144 BTU
- 24,000 BTU
- 970 BTU
- 12,000 BTU
10: If a low-pressure chiller has a low-side leak, which of the following will most likely result?
- High head pressure and low suction pressure
- High suction pressure and high discharge pressure.
- Low head pressure and high suction pressure
- Low suction pressure and low discharge pressure
11: How many opening forces operate a thermostatic expansion valve?
- 4
- 2
- 3
- 1
12: The discharge relief valve is located (9.4.6)
- on top of the condensor
- between the compressor and the stop valve
- between the compressor and oil separator
- between the compressor and reciever
13: When systems are protected by a high pressure relief device, the compressor's pressure limiting device shall be set at or below ____ % of the operating pressure of the high side relief device.
- 100
- 90
- 80
- 110
14: On a day with low relative humidity, the two thermometers on a sling psychrometer will read
- far apart or greater difference
- 2F difference
- nearly the same
- a ling psychrometer doesn't have two theremometers.
15: A Lithium-bromide system is an absorption system that
- uses water as a absorbent and lithium bromide as a refrigerant
- uses water as a refrigerant and lithium bromide as an absorbent
- uses salts as an absorbent and lithium bromide as a refrigerant
- uses ammonia as a refrigerant and lithium bromide as an absorbent
16: What would be the classification of a prison?
- Institutional
- Industrial
- Place of assembly
- Large mercantile
17: A cross charged power element on an expansion valve would normally be used in what temperature range?
- -40F to 0F
- 0F-38F
- -100F to -40F
- 30F to 50F
18: R-11 belongs to Group
- A-2
- B-1
- B-3
- A-1
19: Suction line oil traps should be installed when the condenser is
- in the basement and the evaporator is on the third floor
- more than 100' away from the evaporator
- on the third floor roof and the evaporator is in the basement
- located outside the operates in temperatures below 35F
20: How many forces operate a thermostatic expansion valve?
- 4
- 1
- 2
- 3
21: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?
- Circuit Breaker
- Relief valve
- Temperature limiter device
- T&P device
22: The evaporator is a device to
- remove heat from the refrigeration system
- Keep the compressor busy
- absorb heat into the refrigeration system
- store liquid refrigerant
23: Emergency shutdown procedures, including precautions to be observed in case of a breakdown or leak over 55 lbs of refrigerant charge, shall be displayed on a conspicuous card located as near as possible to the
- boiler
- evaporator
- outside the machinery room
- compressor
24: How many BTU's is produced by one watt of energy
- 1
- 2.57
- 3.41
- 3.00
25: R-718 is rated unlimited for refrigeration quantity contained in a system. Why?
- R-718 is not rated unlimited because it's a dangerous refrigerant
- Because it's cheap
- Because it's water
- Because it's a non-flammable refrigerant