Topics: ASHRAE/CMR
1: What type of pressure relief device is used on a CO2 system?
- Glove valve
- Gate valve
- Fusible plug
- Rupture disk
2: Pressure limiting devices are not required for systems containing less then ________ refrigerants.
- 6.6 lbs
- 44 lbs
- 13.9 lbs
- 22 lbs
3: What is the refrigerant chlorodifluoromethane?
- R-12
- R-123
- R-134a
- R-22
4: Large Mercantile occupancy is a premise or that portion of a premise where more than ____ persons congregate on levels above or below the street level to purchase personal merchandise.
- 250
- 100
- 400
- 350
5: 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
6: The main purpose of a refrigerant detector in a machinery room is to
- inform there is a refrigerant leak int he system
- detect toxins in the air caused by a refrigerant leak
- to set off an alarm when there is refrigerant present inside the room
- all of the above
7: A factory-sealed system containing less than 22lbs. of Group A1 refrigerant
- shall have a pressure limiting device installed on the high side of the system
- shall have a pressure limiting device and a pressure relief valve installed
- does not require a pressure-limiting device
- shall be inspected by the Boiler of Inspectors bi-annually
8: Trichlorofluoromethane is the name of what refrigerant?
- R-12
- R-113
- R-11
- R-502
9: Emergency shutdown procedures, including precautions to be observed in case of a breakdown or leak over 55 lbs of refrigerant charge, shall be displayed on a conspicuous card located as near as possible to the
- evaporator
- compressor
- boiler
- outside the machinery room
10: 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
11: A High-Probability 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 a failed connection will enter an unoccupied space
- 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
12: 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
- competent welder
- licensed technician
- licensed welder
- welder qualified
13: When a refrigerating machinery room is used, the emergency procedures shall be posted
- outside the room, immediately adjacent to each door
- on a conspicuous card located near the evaporator
- on a conspicuous card located near the compressor
- inside the room, immediately adjacent to each door
14: A Low-Probability 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 a failed connection will enter the occupied space
- is such that a leak of refrigerant from a failed connection can not enter the occupied space
- is a system highly likely to leak form a failed connection or component of such system
15: Most CFC's are
- toxic
- flammable
- inert
- inert but toxic
16: A pressure relief should be located at least _______ from windows and doors.
- 15'
- 25'
- 20'
- 30'
17: What section governs pressure vessels?
- OSHA
- Section 1 ASHREA 15 ASME fired
- Section ASHREA 34
- Section 8 ASHREA 15 ASME unfired
18: What must be done to refrigerant pipes before being buried?
- Coated
- Certified
- Leaked checked
- Encased
19: R-717 is
- water
- carbon dioxide
- trichloromethane
- ammonia
20: How many refrigerant classifications are there for flammability?
- 3
- 2
- 1
- 7
21: When must refrigeration system covered by the code be inspected?
- Upon installation
- Not required
- Annually
- Annually and when installed
22: Large mercantile occupancy is
- a premise or that portion of a premise where more than 200 persons congregate on levels above or below street level to purchase personal merchandise
- a premise of that portion of a premise where more than 100 persons congregate on levels above of below street level to purchase personal merchandise.
- a premise of that portion of a premise where more than 50 persons congregate on levels above of below street level to purchase personal merchandise.
- a premise or that portion of a premise where more than 1500 persons congregate on levels above or below street level to purchase personal merchandise
23: Ammonia can come in contact with _______ ?
- Aluminum
- Copper
- Copper tubing
- Brass
24: Ammonia (NH3) is a group III refrigerant
- True
- False
25: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.
- the mechanical room housing the refrigeration system
- Machinery rooms need not be vented
- the outdoors
- the return air ducted system