Topics: ASHRAE/CMR
1: Name three things that must be done when changing refrigeration lubricant?
- You can't change lubricants.
- Make sure it's compatible, notify owner, notify AHJ
- Nothing must be done
- Place sign, check for leaks, insulate
2: Ammonia shall be discharged into ____________ or a tank containing one gallon of water for every pound of ammonia.
- the atmosphere
- a de-pressurized recovery tank with a silver top and yellow bottom
- a tank containing two pounds of a water/lithium bromide mix for every pound of ammonia
- All of the above
3: High pressure controls should be set no higher than
- 90% of set point
- 10% of set point
- 80% of set point
- 25% of set point
4: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 25
- 50
- 66
- 22
5: What is not a requirement of a class T machine room?
- self-closing doors
- fire hose connection to the building fire protection system
- tight fitting doors
- automatic ventilation
6: When testing systems using non-positive displacement compressors, the entire system shall be considered for test purposes as the low side.
- True
- False
7: Refrigerant restricted in 2004 but used for transition for decades:
- R-22
- R-134A
- R-123
- R-11
8: Who is permitted to access a refrigeration machine room?
- Any employee
- Authorized persons only
- Contractors only
- Anyone, it's a completely safe area
9: What refrigerant is an inorganic compound?
- R-22
- R-410A
- Ammonia
- R-132A
10: What pipe can not be used for refrigeration?
- K
- M
- L
- N
11: R-123 belongs to Group
- B-2
- B-3
- B-1
- A-3
12: What type of pressure relief device is used on a CO2 system?
- Glove valve
- Fusible plug
- Rupture disk
- Gate valve
13: When should a relief valve start to function?
- Before the purge station discharges
- Two times it's working pressure
- At it's set pressure
- 10 psi before it's set pressure
14: R-718 is rated unlimited for refrigeration quantity contained in a system. Why?
- Because it's water
- Because it's a non-flammable refrigerant
- R-718 is not rated unlimited because it's a dangerous refrigerant
- Because it's cheap
15: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
- 80%
- 90%
- 75%
- 100%
16: A High-Probability System
- is such that a leak of refrigerant from a failed connection will enter the occupied space
- is such that any leak will cause injury or death to anyone within a 100 square foot area
- is a system highly likely to leak form a failed connection or component of such system
- is such that a leak of refrigerant from a failed connection will enter an unoccupied space
17: 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
18: A class B2 refrigerant is considered
- non-toxic and highly flammable
- toxic and somewhat flammable
- toxic and non-flammable
- non-toxic and non-flammable
19: No open flames are allowed in the machinery room unless?
- Never can be allowed
- Only when combustion air is provided from outside of the machinery room
- Approved by the authorized person
- Approved by the installing contractor
20: What is R-22?
- HFC
- Chlorofluoromethane
- Chlorodifluoromethane
- CCFCM
21: Single compound Refrigerants are classified by what two criteria?
- Flammability and temperature range
- Temperature range and hazardousness
- Weight and color
- Flammability and toxicity
22: The color code of a tank of ammonia is
- white
- light green
- silver
- lavender
23: The Board of Boilers adopts by reference
- MSCA Code
- the 1997 ANSI/ASHRAE Safety Code
- the MACS Pressure Vessel Code of Massachusetts
- Montreal Protocol Safety Code
24: What would be the classification of a church?
- Industrial
- Large mercantile
- Place of assembly
- Institutional
25: R-12. R-22, and R-40 are considered Group I refrigerants.
- True
- False