Topics: ASHRAE/CMR
1: A machine room with a refrigerant system using ammonia shall
- be provided with a continuously operated ventilation system
- be considered a non-hazardous location in accordance with National Electrical code
- have no flame producing apparatus permanently installed and operated
- All of the above
2: Low temperature systems should have what?
- High pour point
- Low pour point
- High viscosity
- None of the above
3: Setting a pressure relief device shall not exceed ___ of the design pressure
- 80%
- 100%
- 90%
- 75%
4: How much clearance do you need around the perimeter of electrical panels?
- 36"
- 18"
- 24"
- 12"
5: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 33
- 22
- 18
- 50
6: Pressure relief valves shall be marked with the data from
- Section XIII Division of the ASME Boiler & Pressure Code
- Section IV Division of the ASME Boiler & Pressure Code
- Section I Division VIII of ASME Boiler & Pressure Code
- Section VIII Division of the ASME Boiler & Pressure Code
7: High pressure controls should be set no higher than
- 80% of set point
- 25% of set point
- 10% of set point
- 90% of set point
8: What does safe access mean?
- OSHA approved
- A clear unobstructed path to the equipment and controls
- Well-lit exit signs
- Locked doors
9: Indirect systems using Group II refrigerants
- shall be used in refrigeration system in excess of 1,000 lbs
- shall have all refrigerant containing parts except piping, installed in a Class T machine room
- shall be used in refrigeration system less than 1,000 lbs
- shall be used for mechanical equipment only
10: The discharge relief valve is located (9.4.6)
- on top of the condensor
- between the compressor and oil separator
- between the compressor and the stop valve
- between the compressor and reciever
11: The main purpose of a refrigerant detector in a machinery room is to
- inform there is a refrigerant leak int he system
- detect toxins in the air caused by a refrigerant leak
- to set off an alarm when there is refrigerant present inside the room
- all of the above
12: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.
- 2.5
- 5.5
- 2.0
- 3.0
13: Which refrigerant(s) is an HFC?
- R-22
- R-410A
- R-502
- All of the above
14: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.
- there is no Group B1 refrigerants
- the same
- higher
- lower
15: All serviceable components of a refrigeration system shall be provided with
- service manuals
- name plates with markings referring to pressure and temperature in accordance with ASME Boiler and Pressure Vessel Code
- manufactures instructions on start-up procedures
- safe access
16: Direct systems using Group II refrigerants
- shall be allowed to be used for human comfort.
- shall not be used for air condition for human comfort
- shall be installed per instruction of the AHJ
- shall be installed in Class T machinery rooms
17: What section of ASHRAE-15 governs pressure vessels?
- OSHA
- Section 9 ASHRAE-15 ASME VIII unfired
- Section 6 ASHRAE-34 ASME VIII unfired
- Section 7 ASHRAE-15 ASME VIII fired
18: Most CFC's are
- inert but toxic
- toxic
- flammable
- inert
19: Joints in piping for refrigeration containing parts must withstand temperatures of ___?
- 700F
- 600F
- 1000F
- 800F
20: Emergency shutdown procedures, including precautions to be observed in case of a breakdown or leak over 55 lbs of refrigerant charge, shall be displayed on a conspicuous card located as near as possible to the
- evaporator
- compressor
- boiler
- outside the machinery room
21: What is the minimum height refrigeration piping should be placed against walls?
- Ceiling height
- 6'
- 7.25'
- 72"
22: Ammonia (NH3) is a group III refrigerant
- True
- False
23: What is a Category "D" fluid?
- A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and design temperature is between -20F to 366F
- 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
24: Evaporators within 18" of a heating coil must be equipped with a
- high limit control
- zone valve
- low limit control
- pressure relief device
25: A declaration test is needed when the system contains more than
- 65 lbs
- 55 lbs
- 120 lbs
- 110 lbs