Topics: ASHRAE/CMR
1: Insurance companies shall forward each inspection report of all refrigeration or A/C systems to the Chief of Inspections within
- 2 months
- 14 days
- 1 week
- 30 days
2: Can a R22 line set be reused for a 410A system and if it can be reused, what must be done to it?
- Flush with R-718
- Flush with RX-11
- Flush with ammonia
- Flush with R-11
3: What is the refrigerant chlorodifluoromethane?
- R-123
- R-134a
- R-22
- R-12
4: What is the minimum size of the discharge pipe?
- Same size as the outlet of the relief valve
- One pipe size larger that the inlet of the relief valve
- Depends on size of manifold
- All of the above
5: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.
- 99%
- 90%
- 75%
- 80%
6: How many CFMs are required per square foot of commercial office occupied space
- .5 CFM
- 20 CFM
- 15 CFM
- 5 CFM
7: Ammonia belongs to Group
- A-1
- A-2
- B-1
- B-2
8: A High-Probability System
- 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
- is such that any leak will cause injury or death to anyone within a 100 square foot area
9: What refrigerant doesn't have to be classifted?
- R-134a
- R-718
- R-717
- R-711
10: Pressure vessels having an inside diameter of 6” or less shall be protected by
- Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
- a pressure relief device
- either a fusible plug or a pressure relief device
- a fusible plug
11: When systems are protected by a high pressure relief device, the compressor's pressure limiting device shall be set at or below ____ % of the operating pressure of the high side relief device.
- 90
- 100
- 110
- 80
12: A plug containing an alloy that will melt at a specific temperature to relief pressure is a
- relief plug
- fusible plug
- rupture plug
- fusion plug
13: How many refrigerant classifications are there for toxicity?
- 2
- 3
- 5
- 1
14: A “U” or “UM” marking a on a nameplate of a pressure vessels signifies compliance with Section VIII of
- the ASME Boiler and Pressure Vessel Code
- Section 11.3.1.5 ASHRAE 15 Standard
- the ANSI Standard 10.7.2
- both the ANSI Standard 10.7.2 and ASHRAE 15 Standard 11.3.1.5
15: Liquid level gauge glasses shall have automatic closing shut off valves, except Bull's eye or reflex type.
- True
- False
16: When this is installed on the high side of a system, it must be capable of reading 1.2 times the design pressure (ASHRAE 15 9.11.3)
- Pressure gauge
- Temperature gauge
- Sight glass gauge
- All of the above
17: What type refrigerant is NOT ozone depleting?
- CFC
- HFC
- HCFC
- Halon
18: What is an example of institutional occupancy?
- Dorms
- Hospital
- Shopping mall
- Football stadium
19: A High-Probablity 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 failed connections will enter the unoccupied space
- is a system highly likely to leak from a failed connection or component of such system
- is such that a leak of refrigerant from failed connections will enter the occupied space
20: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.
- the same
- higher
- there is no Group B1 refrigerants
- lower
21: Name an HCFC refrigerant(s):
- R-22
- R-123
- R-11
- both a & b
22: What is Trichlorotrifluoromethane?
- R-113
- R-13
- R-11
- R-12
23: Doors communicating with outside from a mechanical room must be?
- Self-closing, aligned, fire door
- Self-closing, wooden, fire door
- Self-closing, approved, fire door
- Steel, approved, weather-stripped
24: NH3 is
- ammonia
- R-718
- R-508A
- lithium bromide
25: What type of pressure relief device is used on a CO2 system?
- Gate valve
- Fusible plug
- Rupture disk
- Glove valve