Topics: ASHRAE/CMR
1: How many flammability classifications are refrigerants in?
- 3
- 5
- 7
- 2
2: R-22 is classified as a ____ refrigerant on the safety matrix.
- B-1
- A-2
- B-2
- A-1
3: Refrigerants shall be classified by
- color codes
- toxicity and flammability
- maximum permissible quantities of each group
- requirements for commercial, industrial, and residential occupancies
4: A plug containing an alloy that will melt at a specific temperature to relief pressure is a
- fusion plug
- fusible plug
- relief plug
- rupture plug
5: Group A3 refrigerants have a ______ flammability rating than Group B1 refrigerants
- higher
- there is no Group B1 refrigerants
- the same
- lower
6: Where a refrigeration or air conditioning system is installed,
- A field inspection shall be made before it is put into service
- The company who installed the system must notify the fire department in the jurisdiction where installed
- it shall not be operated below prescribed pressuers
- the form or certificate shall be authorized by the Department of Public Safety
7: Insurance companies shall forward each inspection report of all refrigeration or A/C systems to the Chief of Inspections within
- 2 months
- 1 week
- 14 days
- 30 days
8: Class A refrigerants are considered
- flammable
- non-flammable
- toxic
- non-toxic
9: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 50
- 25
- 66
- 22
10: What is an example of institutional occupancy?
- Shopping mall
- Dorms
- Hospital
- Football stadium
11: Name an HCFC refrigerant(s):
- R-22
- R-123
- R-11
- both a & b
12: 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
13: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
- 80%
- 90%
- 100%
- 75%
14: What must be done to refrigerant pipes before being buried?
- Encased
- Coated
- Leaked checked
- Certified
15: Pressure vessel having an inside diameter exceeding 6” with an internal pressure greater than 15psig shall be marked directly on or on the nameplate the letters _______________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
- “U” or “UM”
- “UV”
- “UL”
- “UM” and “UV”
16: Who is permitted to access a refrigeration machine room?
- Any employee
- Authorized persons only
- Contractors only
- Anyone, it's a completely safe area
17: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 500 lbs
- 660 lbs
- 55 lbs
- 330 lbs
18: 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
19: Ammonia can come in contact with _______ ?
- Aluminum
- Copper
- Brass
- Copper tubing
20: The main cause of enacting the "no vending rule" of July 1st 1992 was
- global warming potential
- ozone depletion
- both a & b
- None of the above
21: Where must a refrigeration contractor's license number be displayed?
- Uniforms, checks, and invoices.
- Truck, office, every job, and on all equipment
- Trucks, license plates, and uniforms
- Trucks, invoices, and advertising
22: What would be the classification for Stop & Shop grocery store?
- Instituional
- Large mercantile
- Industrial
- Place of assembly
23: Who authorizes changes to the safety codes?
- Person who pulled the permit
- Contractor who last serviced the system.
- Person in charge of the facility
- Board of Boilers
24: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 33
- 22
- 50
- 18
25: A class B2 refrigerant is considered
- toxic and non-flammable
- non-toxic and non-flammable
- toxic and somewhat flammable
- non-toxic and highly flammable