Topics: All categories in the pool
1: A restaurant is classified as a
- commercial occupancy
- public assembly occupancy
- large mercantile occupancy
- mixed occupancy
2: A pressure relief should be located at least _______ from windows and doors.
- 20'
- 30'
- 15'
- 25'
3: 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
- compressor
- evaporator
- outside the machinery room
- boiler
4: What is used to check very low pressure?
- Hydrometer
- Hygrometer
- Velometer
- Manometer
5: Watt's Law indicates Volts X Amps = _________.
- Watts
- Resistance
- Ohms
- Current
6: What refrigerant were phased out in 2004?
- R-11
- R-22
- R-12
- R-134a
7: 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
8: 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
- licensed technician
- competent welder
- welder qualified
- licensed welder
9: A room having machinery but no flame producing apparatus permanently installed and operated is considered a
- Class A machinery room
- Class M machinery room
- Class B machinery room
- Class T machinery room
10: 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
11: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.
- critical pressure
- low pressure
- high pressure
- design pressure
12: 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
13: At higher altitudes, the boiling point of refrigerant is
- the same
- higher
- equal to the coefficient of water at 32F
- lower
14: The ASHRAE Standard 34 requires what type of alarm for equipment rooms using HCFC-123?
- refrigerant sensing
- CO Sensing
- A group sensing
- phosgene gas sening
15: High pressure controls should be set no higher than
- 25% of set point
- 10% of set point
- 90% of set point
- 80% of set point
16: Which of the following controllers would you expect to be most sensitive to temperature changes?
- line voltage t-stat
- immersion controller
- low voltage t-stat
- aquastat
17: Pressure vessels shall be provided with ___________in accordance with Section VIII of the ASME Boiler & Pressure Vessel Code
- over pressure protection as well as a temperature protection device
- over pressure protection
- Pressure vessels need no type of protection as long as it is hydrostatically tested every three months
- over pressure protection and a rupture disc
18: What is the minimum size of the discharge pipe?
- Same size as the outlet of the relief valve
- One pipe size larger that the inlet of the relief valve
- Depends on size of manifold
- All of the above
19: Low-side system leaks in a low-pressure chiller will often result in
- water being pulled into the system
- nitrogen leaking out of the system.
- air being pulled into the system
- system refrigerant leaking from the system
20: What is the leaving chilled water set point for water chiller systems?
- 45F
- 55F
- 38F
- 66F
21: What is the minimum height refrigeration piping should be placed against walls?
- 72"
- 6'
- 7.25'
- Ceiling height
22: The two float-type metering devices are the
- vapor float and the low-side float.
- high-side float and the low-side float
- liquid float and the vapor float
- liquid float and the low-side float
23: When air is ducted through a machine room that services occupied space, What must be done?
- Flanged and gasketed
- Insulated and cross broke
- Ducted and sealed
- Welded and seamed.
24: Ammonia vaporization takes place at what temperature?
- -32F
- -460F
- -28F
- -110F
25: Heat transferred by conduction from one body to another is done via:
- gas
- liquid
- solid
- All of the above