Topics: ASHRAE/CMR
1: A class B2 refrigerant is considered
- toxic and non-flammable
- non-toxic and non-flammable
- toxic and somewhat flammable
- non-toxic and highly flammable
2: Liquid level gauges shall have _____________ with one exception being that of the liquid level gauge bull’s eye type.
- color-coded glass to determine type of refrigerant
- moisture indicators
- automatic closing shut-off valves
- All of the above
3: 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
4: pressure relief valves must discharge to the atmosphere at a location not less than 15 feet from ground level and ____ feet from any window, ventilation opening, or exits of buildings.
- 20
- 10
- 15
- 25
5: When air is ducted through a machine room that services occupied space, What must be done?
- Flanged and gasketed
- Welded and seamed.
- Ducted and sealed
- Insulated and cross broke
6: Defined process piping by code CMR (528)
- Any piping that conveys a solid, liquid or gas that is not part of the plumbing or fire protection system
- Any piping in an industrial space
- Any piping in an industrial or commercial space
- All of the above
7: Ammonia is under what safety classification?
- B2
- A3
- B3
- B1
8: Pressure vessels having an inside diameter of 6” or less shall be protected by
- either a fusible plug or a pressure relief device
- a fusible plug
- a pressure relief device
- Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
9: The certificate of inspection
- shall be authorized by a notarized insurance company
- shall be posted on the compressor shell or electrical panel at the unit
- shall be $20 and an additional fee of $1 for each tone above 20 tons
- shall be posted and protected from dirt, water, and other elements
10: Evaporators within 18" of a heating coil must be equipped with a
- high limit control
- pressure relief device
- low limit control
- zone valve
11: What does safe access mean?
- A clear unobstructed path to the equipment and controls
- Well-lit exit signs
- OSHA approved
- Locked doors
12: How many CFMs are required per square foot of commercial office occupied space
- 15 CFM
- .5 CFM
- 20 CFM
- 5 CFM
13: What is R-22?
- Chlorodifluoromethane
- HFC
- CCFCM
- Chlorofluoromethane
14: How many different groups of refrigerants are there?
- 3
- 15
- 7
- 11
15: Who is permitted to access a refrigeration machine room?
- Contractors only
- Anyone, it's a completely safe area
- Authorized persons only
- Any employee
16: How many flammability classifications are refrigerants in?
- 2
- 5
- 3
- 7
17: 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 R-11
- Flush with RX-11
- Flush with R-718
- Flush with ammonia
18: Class 3 refrigerants are
- highly flammable
- non-toxic
- non-flammable
- toxic
19: Fusible plugs must have what marked on them?
- Melting temperature in F
- Melting temperature in C
- Opening pressure
- All of the above
20: Trichlorofluoromethane is the name of what refrigerant?
- R-113
- R-502
- R-12
- R-11
21: Who authorizes changes to the safety codes?
- Person in charge of the facility
- Person who pulled the permit
- Board of Boilers
- Contractor who last serviced the system.
22: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.
- 5.5
- 2.5
- 3.0
- 2.0
23: All serviceable components of a refrigeration system shall be provided with
- manufactures instructions on start-up procedures
- safe access
- name plates with markings referring to pressure and temperature in accordance with ASME Boiler and Pressure Vessel Code
- service manuals
24: Which of the following is an inorganic refrigerant?
- R-22
- Ammonia
- Chlorofluorocarbons
- All of the above
25: When a receiver is greater than 3 cubic feet but less than 10 cubic feed, what is the minimum relief device required?
- fusible plug
- relief valve
- rupture disc
- all of the above