Topics: ASHRAE/CMR
1: Ammonia belongs to Group
- A-2
- A-1
- B-1
- B-2
2: 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 RX-11
- Flush with R-11
- Flush with R-718
- Flush with ammonia
3: What is an example of institutional occupancy?
- Football stadium
- Dorms
- Hospital
- Shopping mall
4: A declaration test is needed when the system contains more than
- 55 lbs
- 120 lbs
- 110 lbs
- 65 lbs
5: When a receiver is greater than 3 cubic feet but less than 10 cubic feed, what is the minimum relief device required?
- fusible plug
- relief valve
- rupture disc
- all of the above
6: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 55 lbs
- 550 lbs
- 330 lbs.
- 660 lbs
7: Relief valves are rated in
- gallons of water per minute
- gallons of water per hour
- pounds of air per hour
- pounds of air per minute
8: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.
- the same
- lower
- higher
- there is no Group B1 refrigerants
9: What section of ASHRAE-15 governs pressure vessels?
- Section 6 ASHRAE-34 ASME VIII unfired
- Section 9 ASHRAE-15 ASME VIII unfired
- Section 7 ASHRAE-15 ASME VIII fired
- OSHA
10: A movie theater would be considered a
- commercial occupancy
- mixed occupancy
- public assembly occupancy
- institutional occupancy
11: 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
- you can't change refrigerants
- make sure it's compatible, notify owner, notify A.H.J
12: What must be done to refrigerant pipes before being buried?
- Leaked checked
- Certified
- Coated
- Encased
13: How far from the ground does a relief valve need to be?
- At least 20' above grade
- At least 15' above grade
- At least 25' above grade
- Not more than 3' above grade
14: Most CFC's are
- flammable
- toxic
- inert but toxic
- inert
15: Who is permitted to access a refrigeration machine room?
- Any employee
- Authorized persons only
- Contractors only
- Anyone, it's a completely safe area
16: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.
- 24
- 18
- 15
- 10
17: What do you need to do when you install a new system?
- Document the superheat and subcooling reading
- Insulate the suction line before you take a superheat reading
- Have it inspected
- Add refrigerant
18: Ammonia (NH3) is a group III refrigerant
- True
- False
19: 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
- welder qualified
- competent welder
- licensed technician
- licensed welder
20: 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
21: R-11 belongs to Group
- A-2
- A-1
- B-1
- B-3
22: How many flammability classifications are refrigerants in?
- 5
- 3
- 2
- 7
23: 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
24: 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)
- commercial occupancy
- illegal occupancy
- institutional occupancy
- public assembly occupancy
25: Evaporators within 18" of a heating coil must be equipped with a
- zone valve
- low limit control
- pressure relief device
- high limit control