Topics: ASHRAE/CMR
1: The pressure relief device of a positive displacement compressor shall discharge in the ______________or in accordance with 9.7.8
- the liquid side of the system
- the vapor side of the system
- low side of the system
- high side of the system
2: How many groups of refrigerants are there?
- 5
- 3
- 1
- 7
3: R-22 is classified as a ____ refrigerant on the safety matrix.
- B-2
- A-2
- B-1
- A-1
4: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
- UL and UM
- UV or UR
- UL and UR
- UM or UL
5: Dual-pressure relief devices should be installed on
- vessels of 10 cubic feet or more
- vessels of 10 cubic feet or less
- vessels of 3 cubic feet or less
- vessels of 3 cubic feet or more
6: What is a Category "M" fluid?
- A typical refrigerant used on newer air conditioning and heat pump systems
- A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily content
- A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and the designed temperature is between -20F to 366F
- Any fluid that exceeds 150 psig and has design temperatures over 366F
7: An example of direct system is
- rooftop unit
- chiller
- absorber
- none of the above
8: Liquid level gauge glasses shall have automatic closing shut off valves, except Bull's eye or reflex type.
- True
- False
9: Halo-carbon refrigerants cannot be used with what material?
- Stainless Steel
- Aluminum
- Copper
- Magnesium alloy
10: The Department that certifies the transportation of refrigerant is the
- RSES
- DOT
- EPA
- EPO
11: What refrigerant doesn't have to be classifted?
- R-134a
- R-711
- R-718
- R-717
12: Field Inspections of refrigeration and A/C systems in Massachusetts shall be made by
- District Engineering Inspectors
- Commissioned Inspectors
- Master licensed Technician
- both a or b
13: A class A3 refrigerant is considered
- non-toxic but highly flammable
- non-toxic and non-flammable
- toxic and non-flammable
- toxic and somewhat flammable
14: Where must a refrigeration contractor's license number be displayed?
- Uniforms, checks, and invoices.
- Trucks, license plates, and uniforms
- Truck, office, every job, and on all equipment
- Trucks, invoices, and advertising
15: Which occupancy can ammonia be used in?
- commercial
- depends on the quantity of freon
- industrial
- redifential
16: When an inspection is needed, how often must it be done?
- annually
- every 36 months
- every 18 months
- every 24 months
17: Institutional occupancy is
- a premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space.
- a premise or that portion of a premise from which, because they are disabled, debilitated, or confined, occupants cannot readily leave without the assistance of others.
- a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
- None of the above
18: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.
- 2.5
- 5.5
- 2.0
- 3.0
19: A High-Probablity system
- is such that a leak of refrigerant from failed connections will enter the occupied 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 unoccupied space
20: Which refrigerant was still able to be vented to the atmosphere after July 1, 1992?
- R-11
- R-22
- R-12
- R-113
21: Which refrigerant replaced R-12?
- R-134A
- R-407A
- R-410A
- R-22
22: Which refrigerant class listed below is the most flammable?
- A-1
- B-2
- A-3
- C-3
23: Fusible plugs must have what marked on them?
- Melting temperature in F
- Melting temperature in C
- Opening pressure
- All of the above
24: A plug containing an alloy that will melt at a specific temperature to relief pressure is a
- rupture plug
- relief plug
- fusible plug
- fusion plug
25: What does safe access mean?
- Well-lit exit signs
- OSHA approved
- A clear unobstructed path to the equipment and controls
- Locked doors