Topics: ASHRAE/CMR
1: 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
2: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?
- T&P device
- Relief valve
- Temperature limiter device
- Circuit Breaker
3: What must be done to refrigerant pipes before being buried ?(8.10.4)
- Leak checked
- Certified
- Classifed
- Insulated and installed in a pipe duct (Encased)
4: R-123 belongs to Group
- B-2
- A-3
- B-3
- B-1
5: What was the main reason for enacting the no venting rule of July 1, 1992?
- Ozone depletion
- Green house effect
- Global warming potential
- All of the above
6: Where must a refrigeration contractor's license number be displayed?
- Uniforms, checks, and invoices.
- Truck, office, every job, and on all equipment
- Trucks, license plates, and uniforms
- Trucks, invoices, and advertising
7: When a refrigeration or air conditioning system is installed
- it shall not be operated below prescribed pressures
- it shall be approved by the owner for proper operation.
- the form of certificate shall be authorized by the Department of Pubic safety
- a field inspection shall be made before it is put into service
8: Which refrigerant class listed below is the most flammable?
- C-3
- B-2
- A-3
- A-1
9: Each machinery room shall contain
- 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
- high and low pressure controls
- smoke and fire alarms as well as three means of egress and that egress must meet 528 CMR ventilation requirements
10: What type of material can't be used on the outlet of a relief valve?
- Stainless steel
- Magnesium alloy
- PVC
- Copper
11: Class A refrigerants are considered
- flammable
- non-toxic
- non-flammable
- toxic
12: When an inspection is needed, how often must it be done?
- annually
- every 36 months
- every 18 months
- every 24 months
13: Ashrae states that the equipment on a building needs to conform to adjacent buildings classifications when within ____ feet from opening and intakes.
- 50
- 15
- 75
- 20
14: Which refrigerant class listed below is the most flammable?
- C3
- A3
- B2
- A2
15: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.
- higher
- the same
- lower
- there is no Group B1 refrigerants
16: Who approves containers for refrigerants?
- D.O.D
- D.O.E
- E.P.A
- D.O.T
17: Trichlorofluoromethane is the name of what refrigerant?
- R-12
- R-113
- R-11
- R-502
18: Which of the following are considered inorganic refrigerants?
- R-717 and R-718
- 410A and R-407C
- R-500 and R-502
- None of the above
19: How many different groups of refrigerants are there?
- 11
- 15
- 3
- 7
20: 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
- 10,000
- 100
- 1,000
21: High pressure controls should be set no higher than
- 80% of set point
- 25% of set point
- 90% of set point
- 10% of set point
22: Class T machine room
- shall have remote controls to stop the action of the refrigerant compressor
- shall have refrigerant leak detecting systems installed inside and outside the room
- shall include closets used for setting equipment
- has no flame producing apparatus permanently installed
23: A relief valve discharge capacity is rated in
- PSIA
- Pounds of air per minute.
- temperature minus pounds of air per second divided by release rate squared
- PSIG
24: How many refrigerant classifications are there for toxicity?
- 1
- 2
- 5
- 3
25: Fusible plugs shall not be used with pressure vessels of
- 3 cubic feet or less
- 15 square feet or less
- 3 cubic feet or more
- 15 cubic feet or more