Topics: ASHRAE/CMR
1: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.
- lower
- there is no Group B1 refrigerants
- higher
- the same
2: 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'
3: The ASHRAE Standard 34 requires what type of alarm for equipment rooms using HCFC-123?
- phosgene gas sening
- A group sensing
- CO Sensing
- refrigerant sensing
4: When a refrigeration or air conditioning system is installed
- a field inspection shall be made before it is put into service
- it shall be approved by the owner for proper operation.
- the form of certificate shall be authorized by the Department of Pubic safety
- it shall not be operated below prescribed pressures
5: What type of copper is not permitted on refrigeration systems?
- Type M
- Type L
- Type N
- Type K
6: Low temperature systems should have what?
- High pour point
- Low pour point
- High viscosity
- None of the above
7: How much clearance do you need around the perimeter of electrical panels?
- 24"
- 18"
- 12"
- 36"
8: What refrigerant were phased out in 2004?
- R-12
- R-134a
- R-22
- R-11
9: What refrigerant is an inorganic compound?
- R-132A
- R-410A
- R-22
- Ammonia
10: 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
11: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a
- commercial occupancy
- public assembly occupancy.
- business occupancy
- mercantile occupancy
12: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
- 75%
- 100%
- 90%
- 80%
13: All electrical work done on refrigeration systems must comply with
- Department of Energy
- ASHREA-15 Section 9.2.1
- NEC and Massachusetts Modifications
- OSHA
14: 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 RX-11
- Flush with R-718
- Flush with ammonia
- Flush with R-11
15: All welding done on any refrigeration system or piping covered by 522 CMR 9.00 shall be performed by a according to Section IX of the ASME code
- competent welder
- licensed welder
- welder qualified
- licensed technician
16: 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
17: What is an example of institutional occupancy?
- Football stadium
- Hospital
- Shopping mall
- Dorms
18: A class A3 refrigerant is considered
- toxic and non-flammable
- non-toxic but highly flammable
- non-toxic and non-flammable
- toxic and somewhat flammable
19: What must be done to refrigerant pipes before being buried ?(8.10.4)
- Certified
- Insulated and installed in a pipe duct (Encased)
- Leak checked
- Classifed
20: Pressure limiting devices are not required for systems containing less then ________ refrigerants.
- 13.9 lbs
- 44 lbs
- 6.6 lbs
- 22 lbs
21: What would be the classification of a church?
- Place of assembly
- Large mercantile
- Institutional
- Industrial
22: Fusible plugs shall not be used with pressure vessels of
- 3 cubic feet or less
- 15 square feet or less
- 15 cubic feet or more
- 3 cubic feet or more
23: Which of the following is an inorganic refrigerant?
- R-22
- Ammonia
- Chlorofluorocarbons
- All of the above
24: Evaporators within 18" of a heating coil must be equipped with a
- low limit control
- high limit control
- zone valve
- pressure relief device
25: What is the refrigerant chlorodifluoromethane?
- R-12
- R-123
- R-134a
- R-22