Topics: ASHRAE/CMR
1: A total of all group A-2,B-2, A-3, and B-3 refrigerants shall not exceed ____ lb in the occupied areas and machinery rooms of institutional occupancies.
- 350
- 550
- 100
- 50
2: A Low-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 the occupied space
- is such that a leak of refrigerant from a failed connection can not enter the occupied space
- is a system highly likely to leak form a failed connection or component of such system
3: 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
4: How many CFMs are required per square foot of commercial office occupied space
- .5 CFM
- 15 CFM
- 5 CFM
- 20 CFM
5: When a pressure gauge is permanently installed on a system, it must be ___ times the design pressure of the system.
- 1.2
- 1
- 1.5
- 2.2
6: How many refrigerant classifications are there for flammability?
- 3
- 2
- 1
- 7
7: What type refrigerant is NOT ozone depleting?
- CFC
- HCFC
- HFC
- Halon
8: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.
- 75%
- 99%
- 90%
- 80%
9: What refrigerant were phased out in 2004?
- R-11
- R-134a
- R-22
- R-12
10: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere
- 6.6
- 1,000
- 110
- 330
11: Large vessels containing refrigerant ______________________ from using two or more pressure-relief devices in parallel to obtain the required capacity.
- of Group B2 refrigerant shall be prohibited
- shall not be prohibited
- shall be prohibited
- containing R-11, R-123 & R-717 exclusively shall not be prohibited
12: 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
13: Machinery rooms must be vented to ______?
- outdoors
- unoccupied spaces
- neutralizing tank
- basement
14: No open flames are allowed in the machinery room unless?
- Never can be allowed
- Approved by the installing contractor
- Only when combustion air is provided from outside of the machinery room
- Approved by the authorized person
15: How much clearance do you need around the perimeter of electrical panels?
- 12"
- 18"
- 24"
- 36"
16: What was the main reason for enacting the no venting rule of July 1, 1992?
- Ozone depletion
- Green house effect
- Global warming potential
- All of the above
17: Name an HCFC refrigerant(s):
- R-22
- R-123
- R-11
- both a & b
18: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.
- 10
- 15
- 24
- 18
19: R-717 is
- water
- carbon dioxide
- trichloromethane
- ammonia
20: What refrigerant doesn't have to be classifted?
- R-711
- R-718
- R-134a
- R-717
21: R-12. R-22, and R-40 are considered Group I refrigerants.
- True
- False
22: Joints in refrigeration piping must be _____ before being covered?
- Leak tested
- Insulated
- Inspected
- Pressurized
23: Class 3 refrigerants are
- non-toxic
- highly flammable
- non-flammable
- toxic
24: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.
- 2.0
- 5.5
- 2.5
- 3.0
25: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
- UL and UM
- UM or UL
- UV or UR
- UL and UR