Topics: ASHRAE/CMR
1: A pressure relief should be located at least _______ from windows and doors.
- 30'
- 20'
- 25'
- 15'
2: Class T machine room
- shall have refrigerant leak detecting systems installed inside and outside the room
- shall include closets used for setting equipment
- has no flame producing apparatus permanently installed
- shall have remote controls to stop the action of the refrigerant compressor
3: A declaration test is needed when the system contains more than
- 110 lbs
- 65 lbs
- 120 lbs
- 55 lbs
4: When releasing a hydrogenated hydrocarbon refrigerant to the atmosphere, ample ventilation must be provided and
- no flames shall be permitted
- the owner shall be informed
- explosion precautions must be taken
- gas masks must be worn
5: What refrigerant doesn't have to be classified?
- R-422A
- R-134A
- R-717
- R-718
6: Trichlorofluoromethane is the name of what refrigerant?
- R-113
- R-12
- R-11
- R-502
7: Emergency shutdown procedures, including precautions to be observed in case of a breakdown or leak over 55 lbs of refrigerant charge, shall be displayed on a conspicuous card located as near as possible to the
- boiler
- compressor
- evaporator
- outside the machinery room
8: NH3 is
- ammonia
- lithium bromide
- R-718
- R-508A
9: Which occupancy can ammonia be used in?
- commercial
- depends on the quantity of freon
- redifential
- industrial
10: A High-Probablity system
- is such that a leak of refrigerant from failed connections will enter the unoccupied 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
- is such that a leak of refrigerant from failed connections will enter the occupied space
11: Which refrigerant(s) is an HFC?
- R-22
- R-410A
- R-502
- All of the above
12: 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
- CFC-11
- ammonia
- Lithium bromide
13: A relief valve discharge capacity is rated in
- PSIG
- Pounds of air per minute.
- PSIA
- temperature minus pounds of air per second divided by release rate squared
14: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a
- business occupancy
- public assembly occupancy.
- commercial occupancy
- mercantile occupancy
15: 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
16: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?
- When there are sprinklers above
- When its white
- When it's used as part of a supply or return air system
- When there is a space 6' or more above it
17: How many gallons of water do you need per pound of ammonia?
- 50
- 100
- 10
- 1
18: Low temperature systems should have what?
- High pour point
- Low pour point
- High viscosity
- None of the above
19: Walls and doors of a machinery room shall be at least _____ hour(s) fire rated.
- 1
- 2
- 5
- 3
20: B3 refrigerants are considered
- non-toxic but flammable
- non-toxic but non-flammable
- toxic but non-flammable
- toxic and highly flammable
21: A “U” or “UM” marking a on a nameplate of a pressure vessels signifies compliance with Section VIII of
- the ASME Boiler and Pressure Vessel Code
- Section 11.3.1.5 ASHRAE 15 Standard
- the ANSI Standard 10.7.2
- both the ANSI Standard 10.7.2 and ASHRAE 15 Standard 11.3.1.5
22: Who is permitted to access a refrigeration machine room?
- Authorized persons only
- Contractors only
- Anyone, it's a completely safe area
- Any employee
23: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
- 90%
- 100%
- 75%
- 80%
24: What is not a requirement of a class T machine room?
- automatic ventilation
- self-closing doors
- fire hose connection to the building fire protection system
- tight fitting doors
25: Evaporators within 18" of a heating coil must be equipped with a
- pressure relief device
- high limit control
- low limit control
- zone valve