Topics: ASHRAE/CMR
1: Indirect systems using Group II refrigerants
- shall be used in refrigeration system in excess of 1,000 lbs
- shall be used for mechanical equipment only
- shall be used in refrigeration system less than 1,000 lbs
- shall have all refrigerant containing parts except piping, installed in a Class T machine room
2: A premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space such as auditoriums, ballrooms, classrooms, passenger depots, restaurants, and theaters is considered a(n)
- public assembly occupancy
- commercial occupancy
- illegal occupancy
- institutional occupancy
3: A High-Probablity system
- 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
- 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
4: What type of copper is not permitted on refrigeration systems?
- Type N
- Type K
- Type M
- Type L
5: All machine rooms must be outfitted with a detector that _______?
- activates an audible alarm
- activates a visual alarm
- starts the ventilation system
- All of the above
6: The pressure relief device of a positive displacement compressor shall discharge in the ______________or in accordance with 9.7.8
- the liquid side of the system
- high side of the system
- the vapor side of the system
- low side of the system
7: What is R-22?
- CCFCM
- HFC
- Chlorodifluoromethane
- Chlorofluoromethane
8: Name a CFC refrigerant(s):
- R-11
- R-12
- R-123
- both a & b
9: A hotel is considered a _______ occupancy.
- mercantile
- residential
- institutional
- commercial
10: Before determining if a machinery room equipment is excluded from following Ashrae 15, you must determine how many pounds of refrigerant per _____ cubic feet?
- 100,000
- 100
- 1,000
- 10,000
11: How many groups of refrigerants are there?
- 7
- 3
- 5
- 1
12: Refrigeration piping before being buried shall be
- leak tested
- encased in pipe duct
- pressure tested
- All of the above
13: What does safe access mean?
- OSHA approved
- A clear unobstructed path to the equipment and controls
- Well-lit exit signs
- Locked doors
14: Each machinery room shall contain
- smoke and fire alarms as well as three means of egress and that egress must meet 528 CMR ventilation requirements
- high and low pressure controls
- a refrigerant detector located in an area where the refrigerant from a leak will concentrate
- a toxicity detector where the presence of ammonia or lithium bromide from a leak will concentrate
15: A relief valve shall be located at least ___ above grade.
- 25'
- 36'
- 15'
- 10'
16: A person holding a license as a refrigeration technician may connect or disconnect for the purpose of installation, repair, or replacement, any electrical device or control to be a part of a refrigeration or air conditioning system, from the
- load-side of the contactor in
- breaker panel in
- first disconnect in
- 24 volt secondary side of the Class 2 transformer to the thermostat
17: Group A3 refrigerants have a ______ flammability rating than Group B1 refrigerants
- lower
- the same
- there is no Group B1 refrigerants
- higher
18: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?
- T&P device
- Temperature limiter device
- Relief valve
- Circuit Breaker
19: Single compound Refrigerants are classified by what two criteria?
- Flammability and temperature range
- Temperature range and hazardousness
- Weight and color
- Flammability and toxicity
20: R-123 belongs to Group
- B-1
- A-3
- B-3
- B-2
21: The certificate of inspection
- shall be authorized by a notarized insurance company
- shall be posted on the compressor shell or electrical panel at the unit
- shall be posted and protected from dirt, water, and other elements
- shall be $20 and an additional fee of $1 for each tone above 20 tons
22: 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 ammonia
- Flush with RX-11
- Flush with R-11
- Flush with R-718
23: _____ alloys shall not be used in contact with an halogenated refrigerants.
- Magnesium
- Zinc
- Nickel
- Copper
24: Setting a pressure relief device shall not exceed ___ of the design pressure
- 90%
- 80%
- 75%
- 100%
25: What happens after your initial inspection of a pressure vessel?
- Notify the Fire Marshal that the system has been inspected and approved
- Inspector leaves a metal tag with a certification listed on it
- There is a temporary shut-down until a final inspection can be performed.
- Notify the AHJ to let them know that the system been inspected