Topics: ASHRAE/CMR
1: A relief valve discharge capacity is rated in
- PSIA
- temperature minus pounds of air per second divided by release rate squared
- PSIG
- Pounds of air per minute.
2: When air is ducted through a machine room that services occupied space, What must be done?
- Flanged and gasketed
- Insulated and cross broke
- Ducted and sealed
- Welded and seamed.
3: Which refrigerant(s) is an HFC?
- R-22
- R-410A
- R-502
- All of the above
4: What is the refrigerant chlorodifluoromethane?
- R-123
- R-134a
- R-12
- R-22
5: What do you need to do when you install a new system?
- Document the superheat and subcooling reading
- Have it inspected
- Insulate the suction line before you take a superheat reading
- Add refrigerant
6: What refrigerant has zero ozone depletion
- HFC
- CFC
- HCFC
- None of the above
7: Which of the following are considered inorganic refrigerants?
- R-717 and R-718
- 410A and R-407C
- R-500 and R-502
- None of the above
8: R-22 is considered a(n)
- CFC
- HFC
- HCFC
- HCFCH
9: What is a Category "D" fluid?
- A typical refrigerant used on newer air conditioning and heat pump ssytems
- A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and design temperature is between -20F to 366F
- Any fluid that exceeds 150 psig and has design temperature of over 366F
- A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily contact
10: An evaporator coil located near heating coil shall have a pressure-relief device installed within ______ inches of the evaporator.
- 24
- 48
- 36
- 18
11: Pressure relief valves shall be marked with the data from
- Section IV Division of the ASME Boiler & Pressure Code
- Section XIII Division of the ASME Boiler & Pressure Code
- Section I Division VIII of ASME Boiler & Pressure Code
- Section VIII Division of the ASME Boiler & Pressure Code
12: Which refrigerant was still able to be vented to the atmosphere after July 1, 1992?
- R-22
- R-113
- R-11
- R-12
13: Ammonia is under what safety classification?
- A3
- B1
- B3
- B2
14: Joints in piping for refrigeration containing parts must withstand temperatures of ___?
- 1000F
- 800F
- 700F
- 600F
15: 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.
- 9.00'
- 8'4"
- 7.25'
- 7.00'
16: R-717 is
- ammonia
- trichloromethane
- water
- carbon dioxide
17: Refrigerant restricted in 2004 but used for transition for decades:
- R-134A
- R-123
- R-22
- R-11
18: Name three things that must be done when changing refrigeration lubricant?
- Place sign, check for leaks, insulate
- Nothing must be done
- You can't change lubricants.
- Make sure it's compatible, notify owner, notify AHJ
19: Walls and doors of a machinery room shall be at least _____ hour(s) fire rated.
- 3
- 5
- 1
- 2
20: A class B2 refrigerant is considered
- toxic and non-flammable
- non-toxic and non-flammable
- non-toxic and highly flammable
- toxic and somewhat flammable
21: Pressure limiting devices are not required for systems containing less then ________ refrigerants.
- 13.9 lbs
- 6.6 lbs
- 22 lbs
- 44 lbs
22: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 50
- 33
- 18
- 22
23: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 500 lbs
- 330 lbs
- 660 lbs
- 55 lbs
24: How many flammability classifications are refrigerants in?
- 3
- 5
- 7
- 2
25: What is an example of institutional occupancy?
- Hospital
- Shopping mall
- Football stadium
- Dorms