Topics: ASHRAE/CMR
1: Which refrigerant(s) is an HFC?
- R-22
- R-410A
- R-502
- All of the above
2: A room having machinery but no flame producing apparatus permanently installed and operated is considered a
- Class T machinery room
- Class A machinery room
- Class B machinery room
- Class M machinery room
3: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.
- 3.0
- 2.0
- 2.5
- 5.5
4: 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
- 110
- 80
- 100
5: High pressure controls should be set no higher than
- 90% of set point
- 80% of set point
- 10% of set point
- 25% of set point
6: What section governs pressure vessels?
- Section ASHREA 34
- Section 1 ASHREA 15 ASME fired
- Section 8 ASHREA 15 ASME unfired
- OSHA
7: A class B1 refrigerant is considered
- non-toxic but highly flammable
- toxic but non-flammable
- toxic and somewhat flammable
- non-toxic and non-flammable
8: A High-Probability System
- 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 the occupied space
- is such that a leak of refrigerant from a failed connection will enter an unoccupied space
- is such that any leak will cause injury or death to anyone within a 100 square foot area
9: Trichlorofluoromethane is the name of what refrigerant?
- R-502
- R-12
- R-113
- R-11
10: How much refrigerant can be stored in a mechanical room outside of the system?
- 330
- 100
- 200
- 150
11: Where are the three places that the discharge from an ammonia relief valve be piped?
- To chemical neutralizing tank only
- Underground, into drain, into mechanical room
- Atmosphere, Tank containing water, where the AHJ indicates.
- None of the above.
12: What is a Category "D" fluid?
- A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and design temperature is between -20F to 366F
- A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily contact
- Any fluid that exceeds 150 psig and has design temperature of over 366F
- A typical refrigerant used on newer air conditioning and heat pump ssytems
13: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.
- 18
- 10
- 15
- 24
14: A plug containing an alloy that will melt at a specific temperature to relief pressure is a
- rupture plug
- fusion plug
- fusible plug
- relief plug
15: The 522 CMR 9.00 has adopted for reference ASHRAE ____
- 25
- 10
- III
- 15
16: A professional or office building would be considered what type of occupancy?
- mercantile
- business
- public assembly
- commercial
17: Refrigerant restricted in 2004 but used for transition for decades:
- R-134A
- R-123
- R-11
- R-22
18: What must be done to all doors and access points in duct work going through a mechanical room?
- Must be hindged
- Must be screwed shut
- Must be sealed and gasketed
- All of the above
19: 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
20: R-718 is rated unlimited for refrigeration quantity contained in a system. Why?
- Because it's a non-flammable refrigerant
- Because it's water
- Because it's cheap
- R-718 is not rated unlimited because it's a dangerous refrigerant
21: 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
22: Single compound Refrigerants are classified by what two criteria?
- Flammability and temperature range
- Weight and color
- Flammability and toxicity
- Temperature range and hazardousness
23: Ammonia is under what safety classification?
- B3
- B1
- A3
- B2
24: 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
25: Insurance companies shall forward each inspection report of all refrigeration or A/C systems to the Chief of Inspections within
- 30 days
- 2 months
- 14 days
- 1 week