Topics: ASHRAE/CMR
1: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.
- design pressure
- high pressure
- low pressure
- critical pressure
2: A pressure relief should be located at least _______ from windows and doors.
- 15'
- 20'
- 30'
- 25'
3: What is R-22?
- Chlorofluoromethane
- HFC
- Chlorodifluoromethane
- CCFCM
4: Evaporators within 18" of a heating coil must be equipped with a
- high limit control
- low limit control
- pressure relief device
- zone valve
5: Pressure vessels shall be provided with ___________in accordance with Section VIII of the ASME Boiler & Pressure Vessel Code
- over pressure protection and a rupture disc
- Pressure vessels need no type of protection as long as it is hydrostatically tested every three months
- over pressure protection as well as a temperature protection device
- over pressure protection
6: Refrigeration piping before being buried shall be
- leak tested
- encased in pipe duct
- pressure tested
- All of the above
7: The color code of a tank of ammonia is
- light green
- white
- silver
- lavender
8: Pressure vessels with an internal volume of 10 cubic feet or more
- shall use pressure relief devices
- shall use rupture discs or duel pressure relief valves
- shall use fusible plugs
- shall use pressure relief devices or fusible plugs
9: R-718 is rated unlimited for refrigeration quantity contained in a system. Why?
- R-718 is not rated unlimited because it's a dangerous refrigerant
- Because it's a non-flammable refrigerant
- Because it's water
- Because it's cheap
10: What would be the classification for Stop & Shop grocery store?
- Instituional
- Place of assembly
- Industrial
- Large mercantile
11: 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.
- 350
- 100
- 400
- 250
12: 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 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
13: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.
- True
- False
14: When must refrigeration system covered by the code be inspected?
- Upon installation
- Annually and when installed
- Not required
- Annually
15: Where a refrigeration or air conditioning system is installed,
- the form or certificate shall be authorized by the Department of Public Safety
- A field inspection shall be made before it is put into service
- it shall not be operated below prescribed pressuers
- The company who installed the system must notify the fire department in the jurisdiction where installed
16: What must be done to refrigerant pipes before being buried?
- Encased
- Certified
- Leaked checked
- Coated
17: 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
18: How much refrigerant can be stored in a mechanical room outside of the system?
- 330
- 100
- 150
- 200
19: Refrigerant piping crossing an open space that affords passageway in any building shall not be less than _____ feet above the floor unless piping is located against the ceiling.
- 8'4"
- 9.00'
- 7.00'
- 7.25'
20: What type of material can't be used on the outlet of a relief valve?
- Stainless steel
- Copper
- PVC
- Magnesium alloy
21: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a
- public assembly occupancy.
- business occupancy
- commercial occupancy
- mercantile occupancy
22: Each machinery room shall contain
- high and low pressure controls
- a toxicity detector where the presence of ammonia or lithium bromide from a leak will concentrate
- a refrigerant detector located in an area where the refrigerant from a leak will concentrate
- smoke and fire alarms as well as three means of egress and that egress must meet 528 CMR ventilation requirements
23: Before determining if a machinery room equipment is excluded from following Ashrae 15, you must determine how many pounds of refrigerant per _____ cubic feet?
- 1,000
- 100
- 10,000
- 100,000
24: A class A3 refrigerant is considered
- non-toxic but highly flammable
- non-toxic and non-flammable
- toxic and non-flammable
- toxic and somewhat flammable
25: The discharge relief valve is located (9.4.6)
- on top of the condensor
- between the compressor and the stop valve
- between the compressor and reciever
- between the compressor and oil separator