Topics: ASHRAE/CMR
1: A relief valve discharge capacity is rated in
- temperature minus pounds of air per second divided by release rate squared
- PSIG
- Pounds of air per minute.
- PSIA
2: Who is permitted to access a refrigeration machine room?
- Any employee
- Anyone, it's a completely safe area
- Authorized persons only
- Contractors only
3: What is the minimum height refrigeration piping should be placed against walls?
- 6'
- Ceiling height
- 72"
- 7.25'
4: Systems containing more than 110 pounds must have stop valves located at the
- compressor suction inlet
- compressor discharge outlet
- receiver inlet and outlet
- All of the above
5: What is Trichlorotrifluoromethane?
- R-12
- R-13
- R-113
- R-11
6: What would be the classification for Stop & Shop grocery store?
- Large mercantile
- Place of assembly
- Instituional
- Industrial
7: When a refrigerating machinery room is used, the emergency procedures shall be posted
- inside the room, immediately adjacent to each door
- on a conspicuous card located near the compressor
- outside the room, immediately adjacent to each door
- on a conspicuous card located near the evaporator
8: What is the definition of exit?
- Anywhere where a stairwell leads to outdoors
- The separated fire-resistant portion of a means of egress providing a protected travel path between the exit access and the exit discharge
- Any doorway or pathway unobstructed for access to anywhere considered safe
- Both a & b
9: Name three things that must be done when changing refrigeration lubricant?
- Nothing must be done
- Make sure it's compatible, notify owner, notify AHJ
- Place sign, check for leaks, insulate
- You can't change lubricants.
10: How many gallons of water do you need per pound of ammonia?
- 1
- 10
- 100
- 50
11: A plug containing an alloy that will melt at a specific temperature to relief pressure is a
- fusible plug
- fusion plug
- rupture plug
- relief plug
12: A declaration test is needed when the system contains more than
- 120 lbs
- 55 lbs
- 65 lbs
- 110 lbs
13: Group A3 refrigerants have a ______ flammability rating than Group B1 refrigerants
- higher
- lower
- there is no Group B1 refrigerants
- the same
14: When an inspection is needed, how often must it be done?
- annually
- every 18 months
- every 24 months
- every 36 months
15: R-717 is
- trichloromethane
- carbon dioxide
- water
- ammonia
16: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere
- 330
- 1,000
- 110
- 6.6
17: 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.
- 7.00'
- 7.25'
- 9.00'
- 8'4"
18: 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
19: What refrigerant is an inorganic compound?
- Ammonia
- R-22
- R-132A
- R-410A
20: R-12. R-22, and R-40 are considered Group I refrigerants.
- True
- False
21: 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.
- HCFC-123
- Lithium bromide
- ammonia
- CFC-11
22: What kind of material can't be used on the outlet of a relief valve?
- Stainless Steel
- Aluminum
- Copper
- PVC
23: What is the refrigerant dichlorodifluoromethane?
- R-12
- R-123
- R-134A
- R-22
24: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.
- 80%
- 75%
- 99%
- 90%
25: Ammonia (NH3) is a group III refrigerant
- True
- False