Topics: ASHRAE/CMR
1: Joints in refrigeration piping must be _____ before being covered?
- Insulated
- Pressurized
- Leak tested
- Inspected
2: A class A3 refrigerant is considered
- non-toxic but highly flammable
- non-toxic and non-flammable
- toxic and non-flammable
- toxic and somewhat flammable
3: R-718 is rated unlimited for refrigeration quantity contained in a system. Why?
- Because it's a non-flammable refrigerant
- Because it's cheap
- Because it's water
- R-718 is not rated unlimited because it's a dangerous refrigerant
4: The 522 CMR 9.00 has adopted for reference ASHRAE ____
- 25
- III
- 10
- 15
5: An evaporator coil located near heating coil shall have a pressure-relief device installed within ______ inches of the evaporator.
- 24
- 18
- 48
- 36
6: 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
7: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.
- lower
- there is no Group B1 refrigerants
- higher
- the same
8: Machinery rooms must be vented to ______?
- basement
- outdoors
- unoccupied spaces
- neutralizing tank
9: According to the 522 CMR Board of Boilers, refrigerant detectors, alarms, and the refrigeration mechanical room ventilating systems shall be tested
- regularly
- quarterly
- bi-annually
- annually
10: What refrigerant doesn't have to be classified?
- R-717
- R-134A
- R-422A
- R-718
11: copper and its alloys shall not be used in contact with _____ except as a component of bronze alloys for bearing or other non-refrigerant containing uses.
- CFC-11
- HCFC-123
- ammonia
- Lithium bromide
12: How many gallons of water do you need per pound of ammonia?
- 50
- 100
- 1
- 10
13: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.
- 90%
- 80%
- 75%
- 99%
14: How much refrigerant can be stored in a mechanical room outside of the system?
- 200
- 100
- 150
- 330
15: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 22
- 18
- 50
- 33
16: Liquid level gauge glasses shall have automatic closing shut off valves, except Bull's eye or reflex type.
- True
- False
17: A premise where large numbers of people congregate and from which occupants can not quickly vacate the space is considered
- institutional occupancy
- commercial occupancy
- mixed occupancy
- public assembly occupancy
18: What refrigerant has zero ozone depletion
- HFC
- CFC
- HCFC
- None of the above
19: A High-Probability System
- 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 an unoccupied space
- 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
20: Where a refrigeration or air conditioning system is installed,
- the form or certificate shall be authorized by the Department of Public Safety
- A field inspection shall be made before it is put into service
- The company who installed the system must notify the fire department in the jurisdiction where installed
- it shall not be operated below prescribed pressuers
21: R-123 belongs to Group
- A-3
- B-3
- B-2
- B-1
22: 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
- a toxicity detector where the presence of ammonia or lithium bromide from a leak will concentrate
- high and low pressure controls
23: What would be the classification of a church?
- Institutional
- Industrial
- Large mercantile
- Place of assembly
24: Ashrae states that the equipment on a building needs to conform to adjacent buildings classifications when within ____ feet from opening and intakes.
- 50
- 20
- 75
- 15
25: Pressure vessels nameplate markings must be compliant with the
- ASHRAE 34 Standards
- CMR-588 & CMR-528
- ASME Boiler and Pressure Vessel Code
- All of the Above