Topics: ASHRAE/CMR
1: A class A3 refrigerant is considered
- toxic and non-flammable
- toxic and somewhat flammable
- non-toxic but highly flammable
- non-toxic and non-flammable
2: Field Inspections of refrigeration and A/C systems in Massachusetts shall be made by
- District Engineering Inspectors
- Commissioned Inspectors
- Master licensed Technician
- both a or b
3: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- nothing must be done
- place sign, check for leaks, insulate
- make sure it's compatible, notify owner, notify A.H.J
- you can't change refrigerants
4: A plug containing an alloy that will melt at a specific temperature to relief pressure is a
- fusible plug
- relief plug
- rupture plug
- fusion plug
5: What is a Category "D" fluid?
- 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
- A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and design temperature is between -20F to 366F
6: The certificate of inspection
- shall be authorized by a notarized insurance company
- shall be $20 and an additional fee of $1 for each tone above 20 tons
- shall be posted and protected from dirt, water, and other elements
- shall be posted on the compressor shell or electrical panel at the unit
7: pressure relief valves must discharge to the atmosphere at a location not less than 15 feet from ground level and ____ feet from any window, ventilation opening, or exits of buildings.
- 20
- 25
- 10
- 15
8: A premise where large numbers of people congregate and from which occupants can not quickly vacate the space is considered
- mixed occupancy
- public assembly occupancy
- institutional occupancy
- commercial occupancy
9: Industrial occupancy is
- a premise or that portion of a premise that is not open to the public, where access by authorized persons is controlled, and that is used to manufacture, process, or store goods, such as chemicals, food, ice, meat, or petroleum.
- is a premise or that portion of a premise where large number of people congregate and from which occupants cannot quickly vacate the space.
- a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
- Both a and b are correct
10: What type of relief valve is used on low pressure centrifugal compressor systems?
- Spring-loaded relief valve
- Rupture disc
- Purge relief
- None of the above
11: How many CFMs are required per square foot of commercial office occupied space
- 5 CFM
- .5 CFM
- 15 CFM
- 20 CFM
12: B3 refrigerants are considered
- non-toxic but non-flammable
- non-toxic but flammable
- toxic but non-flammable
- toxic and highly flammable
13: What happens after your initial inspection of a pressure vessel?
- Notify the AHJ to let them know that the system been inspected
- 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 Fire Marshal that the system has been inspected and approved
14: No open flames are allowed in the machinery room unless?
- Approved by the authorized person
- Approved by the installing contractor
- Never can be allowed
- Only when combustion air is provided from outside of the machinery room
15: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?
- When its white
- When there are sprinklers above
- When there is a space 6' or more above it
- When it's used as part of a supply or return air system
16: How many groups of refrigerants are there?
- 7
- 5
- 3
- 1
17: Which refrigerant(s) is an HFC?
- R-22
- R-410A
- R-502
- All of the above
18: R-717 is
- water
- carbon dioxide
- ammonia
- trichloromethane
19: When can recovered refrigerants be reused?
- They can't
- Only when used in original owner's equipment
- Only if used in 30 days of recovery
- None of the above
20: What type of material can't be used on the outlet of a relief valve?
- PVC
- Stainless steel
- Copper
- Magnesium alloy
21: Relief valves are rated in
- pounds of air per hour
- gallons of water per minute
- gallons of water per hour
- pounds of air per minute
22: 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
- 100
- 110
- 80
23: What is the refrigerant dichlorodifluoromethane?
- R-22
- R-134A
- R-123
- R-12
24: How many flammability classifications are refrigerants in?
- 2
- 5
- 3
- 7
25: 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