Topics: ASHRAE/CMR
1: What pipe can not be used for refrigeration?
- L
- K
- N
- M
2: What type of refrigerants are NOT flammable?
- CHC
- HFC
- HCFC
- All of the above
3: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.
- 2.5
- 5.5
- 2.0
- 3.0
4: Which refrigerant was still able to be vented to the atmosphere after July 1, 1992?
- R-11
- R-22
- R-12
- R-113
5: Name a CFC refrigerant(s):
- R-11
- R-12
- R-123
- both a & b
6: A room having machinery but no flame producing apparatus permanently installed and operated is considered a
- Class B machinery room
- Class M machinery room
- Class T machinery room
- Class A machinery room
7: copper and its alloys shall not be used in contact with _____ except as a component of bronze alloys for bearing or other non-refrigerant containing uses.
- CFC-11
- HCFC-123
- ammonia
- Lithium bromide
8: Class A refrigerants are considered
- non-flammable
- flammable
- toxic
- non-toxic
9: What is the minimum height refrigeration piping should be placed against walls?
- 7.25'
- Ceiling height
- 72"
- 6'
10: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere
- 330
- 6.6
- 110
- 1,000
11: pressure relief valves must discharge to the atmosphere at a location not less than 15 feet from ground level and ____ feet from any window, ventilation opening, or exits of buildings.
- 15
- 20
- 10
- 25
12: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.
- 18
- 10
- 15
- 24
13: Trichlorofluoromethane is the name of what refrigerant?
- R-502
- R-11
- R-113
- R-12
14: What type of pressure relief device is used on a CO2 system?
- Glove valve
- Gate valve
- Fusible plug
- Rupture disk
15: How many gallons of water per pound of ammonia do you need?
- 20
- 5
- 15
- 1
16: R-11 belongs to Group
- B-3
- A-1
- B-1
- A-2
17: Ammonia can come in contact with _______ ?
- Aluminum
- Brass
- Copper
- Copper tubing
18: What would be the classification of a church?
- Institutional
- Industrial
- Large mercantile
- Place of assembly
19: When a pressure gauge is permanently installed on a system, it must be ___ times the design pressure of the system.
- 1.5
- 1
- 2.2
- 1.2
20: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
- UL and UM
- UV or UR
- UL and UR
- UM or UL
21: Group A3 refrigerants have a ______ flammability rating than Group B1 refrigerants
- higher
- lower
- there is no Group B1 refrigerants
- the same
22: When a refrigeration or air conditioning system is installed
- a field inspection shall be made before it is put into service
- the form of certificate shall be authorized by the Department of Pubic safety
- it shall not be operated below prescribed pressures
- it shall be approved by the owner for proper operation.
23: An evaporator coil located near heating coil shall have a pressure-relief device installed within ______ inches of the evaporator.
- 24
- 18
- 48
- 36
24: A class B1 refrigerant is considered
- non-toxic but highly flammable
- toxic but non-flammable
- toxic and somewhat flammable
- non-toxic and non-flammable
25: What is the refrigerant dichlorodifluoromethane?
- R-22
- R-123
- R-134A
- R-12