Topics: ASHRAE/CMR
1: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?
- Stop valve
- Muffler
- Foot valve
- Moisture indicator
2: Which refrigerant replaced R-12?
- R-134A
- R-410A
- R-22
- R-407A
3: Pressure relief valves shall be marked with the data from
- Section I Division VIII of ASME Boiler & Pressure Code
- Section XIII Division of the ASME Boiler & Pressure Code
- Section IV Division of the ASME Boiler & Pressure Code
- Section VIII Division of the ASME Boiler & Pressure Code
4: 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
- licensed technician
- licensed welder
- competent welder
5: When a pressure gauge is permanently installed on a system, it must be ___ times the design pressure of the system.
- 2.2
- 1.2
- 1.5
- 1
6: Fusible plugs must have what marked on them?
- Melting temperature in F
- Melting temperature in C
- Opening pressure
- All of the above
7: What does safe access mean?
- Locked doors
- Well-lit exit signs
- A clear unobstructed path to the equipment and controls
- OSHA approved
8: What refrigerant has zero ozone depletion
- HFC
- CFC
- HCFC
- None of the above
9: The test pressure applied to the high side of each factory-assembled refrigerating system shall be at least equal to the design pressure of
- the high side
- 2.5 times the design pressure
- the aggregate of the high side and low side
- the low side
10: When an inspection is needed, how often must it be done?
- every 24 months
- every 36 months
- every 18 months
- annually
11: copper and its alloys shall not be used in contact with _____ except as a component of bronze alloys for bearing or other non-refrigerant containing uses.
- CFC-11
- Lithium bromide
- HCFC-123
- ammonia
12: 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
13: How much refrigerant can be stored in a mechanical room outside of the system?
- 330
- 150
- 100
- 200
14: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.
- True
- False
15: What kind of material can't be used on the outlet of a relief valve?
- Stainless Steel
- Aluminum
- Copper
- PVC
16: 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
17: Where must a refrigeration contractor's license number be displayed?
- Trucks, license plates, and uniforms
- Trucks, invoices, and advertising
- Truck, office, every job, and on all equipment
- Uniforms, checks, and invoices.
18: A Low-Probability System
- is such that a leak of refrigerant from a failed connection will enter the occupied space
- is such that any leak will cause injury or death to anyone within a 100 square foot area
- 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 can not enter the occupied space
19: Before determining if a machinery room equipment is excluded from following Ashrae 15, you must determine how many pounds of refrigerant per _____ cubic feet?
- 10,000
- 100
- 1,000
- 100,000
20: What refrigerant doesn't have to be classified?
- R-717
- R-422A
- R-134A
- R-718
21: R-22 is considered a(n)
- HFC
- HCFC
- HCFCH
- CFC
22: A pressure relief should be located at least _______ from windows and doors.
- 25'
- 30'
- 20'
- 15'
23: R-410A is classified as a ____ refrigerant on the safety matrix.
- A-1
- B-1
- A-2
- B-2
24: What do you need to do when you install a new system?
- Document the superheat and subcooling reading
- Add refrigerant
- Insulate the suction line before you take a superheat reading
- Have it inspected
25: Evaporators within 18" of a heating coil must be equipped with a
- pressure relief device
- high limit control
- low limit control
- zone valve