Topics: ASHRAE/CMR
1: Ashrae states that the equipment on a building needs to conform to adjacent buildings classifications when within ____ feet from opening and intakes.
- 20
- 50
- 75
- 15
2: Large Mercantile occupancy is a premise or that portion of a premise where more than ____ persons congregate on levels above or below the street level to purchase personal merchandise.
- 350
- 100
- 250
- 400
3: 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
4: Each machinery room shall contain
- smoke and fire alarms as well as three means of egress and that egress must meet 528 CMR ventilation requirements
- a refrigerant detector located in an area where the refrigerant from a leak will concentrate
- high and low pressure controls
- a toxicity detector where the presence of ammonia or lithium bromide from a leak will concentrate
5: What is an example of institutional occupancy?
- Dorms
- Shopping mall
- Hospital
- Football stadium
6: What must be done if refrigeration lines pass through a concrete floor?
- installed through a pipe casing
- insulated
- leak checked
- moisture barrier
7: Halo-carbon refrigerants cannot be used with what material?
- Magnesium alloy
- Stainless Steel
- Aluminum
- Copper
8: What refrigerant has zero ozone depletion
- HFC
- CFC
- HCFC
- None of the above
9: All electrical work done on refrigeration systems must comply with
- ASHREA-15 Section 9.2.1
- OSHA
- NEC and Massachusetts Modifications
- Department of Energy
10: Where are the three places that the discharge from an ammonia relief valve be piped?
- atmosphere, tank containing water, where the A.H.J. indicates
- underground, into drain, into mechanical room
- to chemical neutralizing tank only
- none of the above
11: What is not a requirement of a class T machine room?
- fire hose connection to the building fire protection system
- automatic ventilation
- self-closing doors
- tight fitting doors
12: 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
13: 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
14: A Low-Probability System
- is such that a leak of refrigerant from a failed connection can not enter the occupied space
- is such that any leak will cause injury or death to anyone within a 100 square foot area
- is such that a leak of refrigerant from a failed connection will enter the occupied space
- is a system highly likely to leak form a failed connection or component of such system
15: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.
- 90%
- 75%
- 80%
- 99%
16: B3 refrigerants are considered
- non-toxic but non-flammable
- non-toxic but flammable
- toxic and highly flammable
- toxic but non-flammable
17: Most CFC's are
- inert
- flammable
- inert but toxic
- toxic
18: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.
- the outdoors
- Machinery rooms need not be vented
- the return air ducted system
- the mechanical room housing the refrigeration system
19: NH3 is
- lithium bromide
- R-508A
- R-718
- ammonia
20: 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
21: A relief valve discharge capacity is rated in
- Pounds of air per minute.
- temperature minus pounds of air per second divided by release rate squared
- PSIA
- PSIG
22: Methyl Chloride is a halogenated refrigerant and should not come in contact with
- aluminum
- zinc
- magnesium
- all of the above
23: R-22 is considered a(n)
- HCFC
- CFC
- HFC
- HCFCH
24: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere
- 110
- 1,000
- 330
- 6.6
25: Low temperature systems should have what?
- High pour point
- Low pour point
- High viscosity
- None of the above