Topics: ASHRAE/CMR
1: Ammonia is under what safety classification?
- A3
- B2
- B3
- B1
2: 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
- low side of the system
- the vapor side of the system
- high side of the system
3: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 50
- 22
- 25
- 66
4: A High-Probability System
- is such that a leak of refrigerant from a failed connection will enter the occupied space
- is such that a leak of refrigerant from a failed connection will enter an 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 form a failed connection or component of such system
5: 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
6: Which refrigerant class listed below is the most flammable?
- C-3
- A-1
- B-2
- A-3
7: A person holding a license as a refrigeration technician may connect or disconnect for the purpose of installation, repair, or replacement, any electrical device or control to be a part of a refrigeration or air conditioning system, from the
- breaker panel in
- 24 volt secondary side of the Class 2 transformer to the thermostat
- first disconnect in
- load-side of the contactor in
8: A class B2 refrigerant is considered
- non-toxic and highly flammable
- toxic and non-flammable
- non-toxic and non-flammable
- toxic and somewhat flammable
9: 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
10: What would be the classification of a prison?
- Institutional
- Industrial
- Large mercantile
- Place of assembly
11: How many flammability classifications are refrigerants in?
- 2
- 5
- 7
- 3
12: What must be done to refrigerant pipes before being buried ?(8.10.4)
- Classifed
- Insulated and installed in a pipe duct (Encased)
- Leak checked
- Certified
13: Who is permitted to access a refrigeration machine room?
- Authorized persons only
- Contractors only
- Anyone, it's a completely safe area
- Any employee
14: Liquid level gauge glasses shall have automatic closing shut off valves, except Bull's eye or reflex type.
- True
- False
15: Pressure relief valves shall be marked with the data from
- Section XIII Division of the ASME Boiler & Pressure Code
- Section IV Division of the ASME Boiler & Pressure Code
- Section VIII Division of the ASME Boiler & Pressure Code
- Section I Division VIII of ASME Boiler & Pressure Code
16: Methyl Chloride is a halogenated refrigerant and should not come in contact with
- aluminum
- zinc
- magnesium
- all of the above
17: Where must a refrigeration contractor's license number be displayed?
- Trucks, license plates, and uniforms
- Trucks, invoices, and advertising
- Uniforms, checks, and invoices.
- Truck, office, every job, and on all equipment
18: What is the minimum height refrigeration piping should be placed against walls?
- 6'
- 72"
- Ceiling height
- 7.25'
19: 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
20: Fusible plugs shall not be used with pressure vessels of
- 15 cubic feet or more
- 3 cubic feet or more
- 15 square feet or less
- 3 cubic feet or less
21: Which occupancy can ammonia be used in?
- commercial
- depends on the quantity of freon
- redifential
- industrial
22: Each machinery room shall contain
- high and low pressure controls
- smoke and fire alarms as well as three means of egress and that egress must meet 528 CMR ventilation requirements
- a toxicity detector where the presence of ammonia or lithium bromide from a leak will concentrate
- a refrigerant detector located in an area where the refrigerant from a leak will concentrate
23: How much refrigerant can be stored in a mechanical room outside of the system?
- 200
- 330
- 150
- 100
24: When systems are protected by a high pressure relief device, the compressor's pressure limiting device shall be set at or below ____ % of the operating pressure of the high side relief device.
- 90
- 100
- 110
- 80
25: 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