Topics: ASHRAE/CMR
1: When a refrigerating machinery room is used, the emergency procedures shall be posted
- on a conspicuous card located near the evaporator
- outside the room, immediately adjacent to each door
- on a conspicuous card located near the compressor
- inside the room, immediately adjacent to each door
2: Which refrigerant class listed below is the most flammable?
- C3
- B2
- A3
- A2
3: All welding done on any refrigeration system or piping covered by 522 CMR 9.00 shall be performed by a according to Section IX of the ASME code
- licensed technician
- licensed welder
- welder qualified
- competent welder
4: B3 refrigerants are considered
- non-toxic but flammable
- non-toxic but non-flammable
- toxic but non-flammable
- toxic and highly flammable
5: R-22 is considered a(n)
- HFC
- CFC
- HCFC
- HCFCH
6: No open flames are allowed in the machinery room unless?
- Approved by the authorized person
- Never can be allowed
- Approved by the installing contractor
- Only when combustion air is provided from outside of the machinery room
7: R-717 is
- ammonia
- carbon dioxide
- water
- trichloromethane
8: The gauge thickness required on a CO2 tank construction is
- 5/16"
- 1/16"
- 1/8"
- 3/32"
9: A Low-Probability System
- 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 can not enter the occupied space
- is such that a leak of refrigerant from a failed connection will enter the occupied space
10: What section of ASHRAE-15 governs pressure vessels?
- OSHA
- Section 7 ASHRAE-15 ASME VIII fired
- Section 6 ASHRAE-34 ASME VIII unfired
- Section 9 ASHRAE-15 ASME VIII unfired
11: Halogen refrigerants are corrosive to which type of metal?
- copper
- black iron
- stainless steel
- magnesium
12: NH3 is
- ammonia
- R-508A
- lithium bromide
- R-718
13: What would be the classification of a church?
- Large mercantile
- Place of assembly
- Institutional
- Industrial
14: R-12. R-22, and R-40 are considered Group I refrigerants.
- True
- False
15: How many gallons of water per pound of ammonia do you need?
- 1
- 20
- 15
- 5
16: Name a CFC refrigerant(s):
- R-11
- R-12
- R-123
- both a & b
17: Name an HCFC refrigerant(s):
- R-22
- R-123
- R-11
- both a & b
18: When must refrigeration system covered by the code be inspected?
- Annually
- Upon installation
- Annually and when installed
- Not required
19: Evaporators within 18" of a heating coil must be equipped with a
- low limit control
- pressure relief device
- zone valve
- high limit control
20: All electrical work done on refrigeration systems must comply with
- NEC and Massachusetts Modifications
- OSHA
- Department of Energy
- ASHREA-15 Section 9.2.1
21: Ammonia belongs to Group
- A-1
- B-2
- B-1
- A-2
22: pressure relief valves must discharge to the atmosphere at a location not less than 15 feet from ground level and ____ feet from any window, ventilation opening, or exits of buildings.
- 15
- 10
- 25
- 20
23: Refrigerant restricted in 2004 but used for transition for decades:
- R-134A
- R-22
- R-123
- R-11
24: What is not a requirement of a class T machine room?
- automatic ventilation
- fire hose connection to the building fire protection system
- tight fitting doors
- self-closing doors
25: When testing systems using non-positive displacement compressors, the entire system shall be considered for test purposes as the low side.
- True
- False