Topics: ASHRAE/CMR
1: Ammonia can come in contact with _______ ?
- Aluminum
- Copper
- Brass
- Copper tubing
2: What type of relief valve is used on low pressure centrifugal compressor systems?
- Spring-loaded relief valve
- Rupture disc
- Purge relief
- None of the above
3: When air is ducted through a machine room that services occupied space, What must be done?
- Insulated and cross broke
- Flanged and gasketed
- Welded and seamed.
- Ducted and sealed
4: Methyl Chloride is a halogenated refrigerant and should not come in contact with
- aluminum
- zinc
- magnesium
- all of the above
5: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.
- higher
- lower
- there is no Group B1 refrigerants
- the same
6: The color code of a tank of ammonia is
- silver
- lavender
- white
- light green
7: Pressure vessels shall be provided with ___________in accordance with Section VIII of the ASME Boiler & Pressure Vessel Code
- over pressure protection and a rupture disc
- over pressure protection as well as a temperature protection device
- over pressure protection
- Pressure vessels need no type of protection as long as it is hydrostatically tested every three months
8: 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
9: How much refrigerant can be stored in a mechanical room outside of the system?
- 150
- 200
- 330
- 100
10: A pressure relief should be located at least _______ from windows and doors.
- 20'
- 25'
- 15'
- 30'
11: What is not a requirement of a class T machine room?
- tight fitting doors
- self-closing doors
- fire hose connection to the building fire protection system
- automatic ventilation
12: A Category D fluid
- is when the fluid handled is non flammable, nontoxic, and not damaging to human as defined in ANSI/ASME Process Piping.
- is when the design pressure does not exceed 150 psi
- a fluid for service piping in which the potential for personnel exposure is judged to cause harm and irreversible damage to those persons exposed to it
- Both a and b are correct
13: _____ alloys shall not be used in contact with an halogenated refrigerants.
- Magnesium
- Zinc
- Copper
- Nickel
14: When an inspection is needed, how often must it be done?
- every 36 months
- every 18 months
- annually
- every 24 months
15: What kind of material can't be used on the outlet of a relief valve?
- Copper
- Aluminum
- PVC
- Stainless Steel
16: Direct systems using Group II refrigerants
- shall not be used for air condition for human comfort
- shall be installed per instruction of the AHJ
- shall be installed in Class T machinery rooms
- shall be allowed to be used for human comfort.
17: How many refrigerant classifications are there for flammability?
- 7
- 3
- 1
- 2
18: A premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space such as auditoriums, ballrooms, classrooms, passenger depots, restaurants, and theaters is considered a(n)
- public assembly occupancy
- institutional occupancy
- illegal occupancy
- commercial occupancy
19: R-12. R-22, and R-40 are considered Group I refrigerants.
- True
- False
20: What section of ASHRAE-15 governs pressure vessels?
- OSHA
- Section 7 ASHRAE-15 ASME VIII fired
- Section 9 ASHRAE-15 ASME VIII unfired
- Section 6 ASHRAE-34 ASME VIII unfired
21: What pipe can not be used for refrigeration?
- K
- L
- N
- M
22: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.
- Machinery rooms need not be vented
- the mechanical room housing the refrigeration system
- the outdoors
- the return air ducted system
23: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.
- True
- False
24: What would be the classification for Stop & Shop grocery store?
- Instituional
- Large mercantile
- Industrial
- Place of assembly
25: What is not a requirement of a Class T machine room?
- Tight fitting doors
- Self-closing doors
- Fire hose connected to the building fire protection system.
- Automatic ventilation