Topics: ASHRAE/CMR
1: Pressure vessels nameplate markings must be compliant with the
- ASHRAE 34 Standards
- CMR-588 & CMR-528
- ASME Boiler and Pressure Vessel Code
- All of the Above
2: The dial of a pressure gauge, when installed on the high side of a system be graduated 1.2 times the designed pressure.
- True
- False
3: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- place sign, check for leaks, insulate
- you can't change refrigerants
- make sure it's compatible, notify owner, notify A.H.J
- nothing must be done
4: 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
5: What type of relief valve is used on a CO2 system?
- glove disc
- rupture disc
- gate valve
- fusible plug
6: What is Trichlorotrifluoromethane?
- R-113
- R-11
- R-13
- R-12
7: How many flammability classifications are refrigerants in?
- 2
- 7
- 5
- 3
8: What is the minimum height refrigeration piping should be placed against walls?
- 72"
- Ceiling height
- 6'
- 7.25'
9: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.
- low pressure
- design pressure
- critical pressure
- high pressure
10: Liquid level gauges shall have _____________ with one exception being that of the liquid level gauge bull’s eye type.
- color-coded glass to determine type of refrigerant
- moisture indicators
- automatic closing shut-off valves
- All of the above
11: What type of material can't be used on the outlet of a relief valve?
- Stainless steel
- PVC
- Magnesium alloy
- Copper
12: 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
13: A relief valve discharge capacity is rated in
- Pounds of air per minute.
- PSIG
- PSIA
- temperature minus pounds of air per second divided by release rate squared
14: When an inspection is needed, how often must it be done?
- every 36 months
- annually
- every 18 months
- every 24 months
15: _____ and its alloys are suitable for use with ammonia systems.
- Copper
- Magnesium
- Aluminum
- Zinc
16: R-410A is classified as a ____ refrigerant on the safety matrix.
- A-2
- A-1
- B-2
- B-1
17: Single compound Refrigerants are classified by what two criteria?
- Flammability and temperature range
- Weight and color
- Temperature range and hazardousness
- Flammability and toxicity
18: Refrigerant piping crossing an open space that affords passageway in any building shall not be less than _____ feet above the floor unless piping is located against the ceiling.
- 7.25'
- 9.00'
- 8'4"
- 7.00'
19: What is the refrigerant dichlorodifluoromethane?
- R-12
- R-134A
- R-22
- R-123
20: What is an example of institutional occupancy?
- Hospital
- Shopping mall
- Football stadium
- Dorms
21: What refrigerant doesn't have to be classified?
- R-134A
- R-717
- R-422A
- R-718
22: A High-Probablity system
- is such that a leak of refrigerant from failed connections will enter the unoccupied space
- is such that a leak of refrigerant from failed connections will enter the occupied space
- is such that any leak will cause injury or death to anyone within a 100 square foot area
- is a system highly likely to leak from a failed connection or component of such system
23: How many gallons of water do you need per pound of ammonia?
- 50
- 100
- 10
- 1
24: Pressure vessels with an internal volume of 10 cubic feet or more
- shall use rupture discs or duel pressure relief valves
- shall use fusible plugs
- shall use pressure relief devices or fusible plugs
- shall use pressure relief devices
25: Where are the three places that the discharge from an ammonia relief valve be piped?
- atmosphere, tank containing water, where the A.H.J. indicates
- underground, into drain, into mechanical room
- to chemical neutralizing tank only
- none of the above