Topics: ASHRAE/CMR
1: 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
2: What type of pressure relief device is used on a CO2 system?
- Gate valve
- Rupture disk
- Glove valve
- Fusible plug
3: R-22 falls under which safety classification?
- B-2
- B-1
- A-2
- A-1
4: Liquid level gauge glasses shall have automatic closing shut off valves, except Bull's eye or reflex type.
- True
- False
5: A class A3 refrigerant is considered
- non-toxic but highly flammable
- non-toxic and non-flammable
- toxic and non-flammable
- toxic and somewhat flammable
6: How much refrigerant can be stored in a mechanical room outside of the system?
- 200
- 100
- 330
- 150
7: What pipe can not be used for refrigeration?
- N
- L
- K
- M
8: A relief valve discharge capacity is rated in
- PSIG
- temperature minus pounds of air per second divided by release rate squared
- Pounds of air per minute.
- PSIA
9: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?
- When there is a space 6' or more above it
- When its white
- When it's used as part of a supply or return air system
- When there are sprinklers above
10: High pressure controls should be set no higher than
- 80% of set point
- 90% of set point
- 25% of set point
- 10% of set point
11: Doors communicating with outside from a mechanical room must be?
- Self-closing, wooden, fire door
- Self-closing, approved, fire door
- Self-closing, aligned, fire door
- Steel, approved, weather-stripped
12: _____ and its alloys are suitable for use with ammonia systems.
- Aluminum
- Copper
- Magnesium
- Zinc
13: Pressure vessels of 10 cubic feet or more gross volume shall use
- at least one rupture member
- a dual pressure-relief valve if charging into the atmosphere
- at least three means of discharge and/or rupture discs
- both a and b are correct
14: 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
15: Who authorizes changes to the safety codes?
- Person who pulled the permit
- Contractor who last serviced the system.
- Board of Boilers
- Person in charge of the facility
16: What is not a requirement of a class T machine room?
- fire hose connection to the building fire protection system
- tight fitting doors
- automatic ventilation
- self-closing doors
17: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere
- 330
- 110
- 6.6
- 1,000
18: Class 3 refrigerants are
- highly flammable
- non-flammable
- toxic
- non-toxic
19: According to the 522 CMR Board of Boilers, refrigerant detectors, alarms, and the refrigeration mechanical room ventilating systems shall be tested
- quarterly
- bi-annually
- annually
- regularly
20: A professional or office building would be considered what type of occupancy?
- business
- public assembly
- commercial
- mercantile
21: What refrigerant doesn't have to be classifted?
- R-711
- R-717
- R-134a
- R-718
22: When air is ducted through a machine room that services occupied space, What must be done?
- Ducted and sealed
- Insulated and cross broke
- Welded and seamed.
- Flanged and gasketed
23: A “U” or “UM” marking a on a nameplate of a pressure vessels signifies compliance with Section VIII of
- the ASME Boiler and Pressure Vessel Code
- Section 11.3.1.5 ASHRAE 15 Standard
- the ANSI Standard 10.7.2
- both the ANSI Standard 10.7.2 and ASHRAE 15 Standard 11.3.1.5
24: 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”
- “UM” and “UV”
- “UV”
- “UL”
25: Class A refrigerants are considered
- toxic
- non-flammable
- non-toxic
- flammable