Topics: ASHRAE/CMR
1: Ammonia shall be discharged into ____________ or a tank containing one gallon of water for every pound of ammonia.
- the atmosphere
- a de-pressurized recovery tank with a silver top and yellow bottom
- a tank containing two pounds of a water/lithium bromide mix for every pound of ammonia
- All of the above
2: 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
- CFC-11
- ammonia
3: What is not a requirement of a class T machine room?
- fire hose connection to the building fire protection system
- automatic ventilation
- tight fitting doors
- self-closing doors
4: What refrigerant doesn't have to be classifted?
- R-717
- R-711
- R-718
- R-134a
5: Large vessels containing refrigerant ______________________ from using two or more pressure-relief devices in parallel to obtain the required capacity.
- of Group B2 refrigerant shall be prohibited
- shall not be prohibited
- containing R-11, R-123 & R-717 exclusively shall not be prohibited
- shall be prohibited
6: Stop valves shall not be permitted between the system and the
- service valve
- bleed valve
- relief valve
- condenser
7: An example of direct system is
- rooftop unit
- chiller
- absorber
- none of the above
8: Refrigerants shall be classified by
- color codes
- requirements for commercial, industrial, and residential occupancies
- maximum permissible quantities of each group
- toxicity and flammability
9: What is the minimum size of the discharge pipe?
- Same size as the outlet of the relief valve
- One pipe size larger that the inlet of the relief valve
- Depends on size of manifold
- All of the above
10: How many different groups of refrigerants are there?
- 7
- 11
- 15
- 3
11: Group A3 refrigerants have a ______ flammability rating than Group B1 refrigerants
- higher
- there is no Group B1 refrigerants
- the same
- lower
12: Can a R22 line set be reused for a 410A system and if it can be reused, what must be done to it?
- Flush with R-11
- Flush with RX-11
- Flush with R-718
- Flush with ammonia
13: Direct systems using Group II refrigerants
- shall be allowed to be used for human comfort.
- shall be installed in Class T machinery rooms
- shall not be used for air condition for human comfort
- shall be installed per instruction of the AHJ
14: B3 refrigerants are considered
- non-toxic but flammable
- toxic but non-flammable
- toxic and highly flammable
- non-toxic but non-flammable
15: It shall be the duty of the person in charge of the premises on which a refrigeration system containing more than ___ lbs of refrigerant is installed to provide a schematic drawing or panel giving directions for the operation of the system.
- 55
- 15
- 75
- 50
16: Machinery rooms must be vented to ______?
- neutralizing tank
- outdoors
- unoccupied spaces
- basement
17: What must be done to all doors and access points in duct work going through a mechanical room?
- Must be hindged
- Must be screwed shut
- Must be sealed and gasketed
- All of the above
18: Which refrigerant replaced R-12?
- R-407A
- R-22
- R-410A
- R-134A
19: 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
20: All machine rooms must be outfitted with a detector that _______?
- activates an audible alarm
- activates a visual alarm
- starts the ventilation system
- All of the above
21: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.
- the mechanical room housing the refrigeration system
- the outdoors
- Machinery rooms need not be vented
- the return air ducted system
22: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
- 75%
- 100%
- 90%
- 80%
23: Where a refrigeration or air conditioning system is installed,
- A field inspection shall be made before it is put into service
- the form or certificate shall be authorized by the Department of Public Safety
- The company who installed the system must notify the fire department in the jurisdiction where installed
- it shall not be operated below prescribed pressuers
24: Large mercantile occupancy is
- a premise of that portion of a premise where more than 100 persons congregate on levels above of below street level to purchase personal merchandise.
- a premise or that portion of a premise where more than 1500 persons congregate on levels above or below street level to purchase personal merchandise
- a premise or that portion of a premise where more than 200 persons congregate on levels above or below street level to purchase personal merchandise
- a premise of that portion of a premise where more than 50 persons congregate on levels above of below street level to purchase personal merchandise.
25: Most CFC's are
- flammable
- inert but toxic
- inert
- toxic