Topics: All categories in the pool
1: 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
2: Which refrigerant class listed below is the most flammable?
- A-1
- A-3
- C-3
- B-2
3: The certificate of inspection
- shall be $20 and an additional fee of $1 for each tone above 20 tons
- shall be authorized by a notarized insurance company
- shall be posted on the compressor shell or electrical panel at the unit
- shall be posted and protected from dirt, water, and other elements
4: 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 R-11
- Flush with ammonia
- Flush with RX-11
- Flush with R-718
5: Ammonia can come in contact with _______ ?
- Aluminum
- Copper tubing
- Brass
- Copper
6: How many forces operate a thermostatic expansion valve?
- 4
- 3
- 1
- 2
7: In an air conditioning plant which an indirect low side, water is used inside of bring: the proper sequence of operating the plan is
- reset the safety valve
- start the comrpessor
- reset the expansion valve
- start the fan and circulating pump
8: The Department that certifies the transportation of refrigerant is the
- RSES
- DOT
- EPO
- EPA
9: The high side float assembly meters refrigerant into the evaporator through the
- lower chamber of the high side
- upper chamber of the low side
- upper chamber of the high side
- lower chamber of the low side
10: What is not a requirement of a Class T machine room?
- Automatic ventilation
- Tight fitting doors
- Self-closing doors
- Fire hose connected to the building fire protection system.
11: Each machinery room shall contain
- high and low pressure controls
- a toxicity detector where the presence of ammonia or lithium bromide from a leak will concentrate
- smoke and fire alarms as well as three means of egress and that egress must meet 528 CMR ventilation requirements
- a refrigerant detector located in an area where the refrigerant from a leak will concentrate
12: What does an anemometer measure?
- amperage
- voltage
- temperature
- velocity
13: The purpose of a receiver is
- a vessel to store refrigerant outside the system
- to increase the capacity that the system can hold
- to use a a later date
- all of the above
14: What section of ASHRAE-15 governs pressure vessels?
- OSHA
- Section 6 ASHRAE-34 ASME VIII unfired
- Section 9 ASHRAE-15 ASME VIII unfired
- Section 7 ASHRAE-15 ASME VIII fired
15: When a refrigeration or air conditioning system is installed
- a field inspection shall be made before it is put into service
- it shall be approved by the owner for proper operation.
- it shall not be operated below prescribed pressures
- the form of certificate shall be authorized by the Department of Pubic safety
16: A relief valve shall be located at least ___ above grade.
- 25'
- 36'
- 10'
- 15'
17: What is the state of the refrigerant leaving the evaporator?
- a high temperature subcooled liquid
- low temperature superheated vapor
- a high temperature superheated vapor
- a low temperature subcooled liquid
18: A start capacitor is wired in _____ with the start windings.
- junction
- series-parallel
- series
- parallel
19: Which of the following most closely represents the concentration of Li-Br in a absorption system?
- 50% Li-Br, 50% tap water
- 40% Li-Br, 60% distilled water
- 40% Li-Br, 60% tap water
- 60% Li-Br, 40% distilled water
20: A mixed occupancy occurs when two or more occupancies are located with the same building
- true
- false
21: What refrigerant is an inorganic compound?
- R-22
- R-132A
- Ammonia
- R-410A
22: What is not a requirement of a class T machine room?
- fire hose connection to the building fire protection system
- self-closing doors
- tight fitting doors
- automatic ventilation
23: Where a refrigeration or air conditioning system is installed,
- the form or certificate shall be authorized by the Department of Public Safety
- The company who installed the system must notify the fire department in the jurisdiction where installed
- A field inspection shall be made before it is put into service
- it shall not be operated below prescribed pressuers
24: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- Nothing must be done
- Make sure its compatible, notify owner, and notify AHJ.
- you can never change refrigerants
- Place sign, check for leaks, and insulate suction line
25: Whoever owns/uses a refrigeration or air conditioning system covered by this code
- must notify the Department of Public Safety prior to starting the system
- shall be licensed by the Commonwealth of Massachusetts according to CMR 522
- shall make application for inspections to the Chief of Inspectors
- None of the above