Topics: ASHRAE/CMR
1: The discharge relief valve is located (9.4.6)
- on top of the condensor
- between the compressor and reciever
- between the compressor and the stop valve
- between the compressor and oil separator
2: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere
- 330
- 1,000
- 6.6
- 110
3: Whoever owns/uses a refrigeration or air conditioning system covered by this code
- must notify the Department of Public Safety prior to starting the system
- shall be licensed by the Commonwealth of Massachusetts according to CMR 522
- shall make application for inspections to the Chief of Inspectors
- None of the above
4: Direct systems using Group II refrigerants
- shall be installed per instruction of the AHJ
- shall not be used for air condition for human comfort
- shall be allowed to be used for human comfort.
- shall be installed in Class T machinery rooms
5: Setting a pressure relief device shall not exceed ___ of the design pressure
- 90%
- 80%
- 100%
- 75%
6: What is the refrigerant chlorodifluoromethane?
- R-12
- R-22
- R-123
- R-134a
7: When must refrigeration system covered by the code be inspected?
- Annually
- Upon installation
- Annually and when installed
- Not required
8: High pressure controls should be set no higher than
- 10% of set point
- 80% of set point
- 25% of set point
- 90% of set point
9: Who approves containers for refrigerants?
- D.O.E
- D.O.D
- D.O.T
- E.P.A
10: What is Trichlorotrifluoromethane?
- R-113
- R-11
- R-13
- R-12
11: What kind of material can't be used on the outlet of a relief valve?
- PVC
- Aluminum
- Stainless Steel
- Copper
12: What would be the classification of a church?
- Industrial
- Place of assembly
- Large mercantile
- Institutional
13: Halogen refrigerants are corrosive to which type of metal?
- stainless steel
- copper
- magnesium
- black iron
14: What refrigerant were phased out in 2004?
- R-22
- R-11
- R-134a
- R-12
15: R-718 is rated unlimited for refrigeration quantity contained in a system. Why?
- Because it's cheap
- Because it's water
- Because it's a non-flammable refrigerant
- R-718 is not rated unlimited because it's a dangerous refrigerant
16: What type of material can't be used on the outlet of a relief valve?
- Stainless steel
- PVC
- Magnesium alloy
- Copper
17: R-22 is considered a(n)
- HCFCH
- CFC
- HCFC
- HFC
18: Which of the following is an inorganic refrigerant?
- R-22
- Ammonia
- Chlorofluorocarbons
- All of the above
19: A room having machinery but no flame producing apparatus permanently installed and operated is considered a
- Class T machinery room
- Class A machinery room
- Class M machinery room
- Class B machinery room
20: What type of copper is not permitted on refrigeration systems?
- Type M
- Type N
- Type K
- Type L
21: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 18
- 50
- 22
- 33
22: When a refrigerating machinery room is used, the emergency procedures shall be posted
- on a conspicuous card located near the compressor
- outside the room, immediately adjacent to each door
- inside the room, immediately adjacent to each door
- on a conspicuous card located near the evaporator
23: What is a Category "D" fluid?
- A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily contact
- A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and design temperature is between -20F to 366F
- A typical refrigerant used on newer air conditioning and heat pump ssytems
- Any fluid that exceeds 150 psig and has design temperature of over 366F
24: The test pressure applied to the high side of each factory-assembled refrigerating system shall be at least equal to the design pressure of
- the high side
- the low side
- 2.5 times the design pressure
- the aggregate of the high side and low side
25: How far from the ground does a relief valve need to be?
- At least 15' above grade
- Not more than 3' above grade
- At least 25' above grade
- At least 20' above grade