Topics: All categories in the pool
1: A relief valve shall be located at least ___ above grade.
- 10'
- 25'
- 36'
- 15'
2: The heat picked up in the evaporator must equal to
- the heat gained by the condenser
- the heat giving by the condenser
- the heat of compression
- the heat lost by the medium being cooled
3: What type of fuses must be used on a HVAC system?
- TR Type, Duel Element, Time Delay
- Fast blow
- 10% lower than RLA
- none of the above
4: Oils, classified as to source, are
- naphthalene, mixed, and paraffin
- animal, vegetable, and mineral
- naphthalene, paraffin, and castor
- animal, vegetable, and castor
5: If two 500 ohm resistors are connected in series, the resistance will be
- 500 ohms
- 200 ohms
- 20 ohms
- 1000 ohms
6: A pressure relief should be located at least _______ from windows and doors.
- 30'
- 20'
- 25'
- 15'
7: A person holding a license as a refrigeration technician may connect or disconnect for the purpose of installation, repair, or replacement, any electrical device or control to be a part of a refrigeration or air conditioning system, from the
- 24 volt secondary side of the Class 2 transformer to the thermostat
- load-side of the contactor in
- breaker panel in
- first disconnect in
8: 1 HP = ____ Watts?
- 11,239
- 3.1416
- 746
- 3,412
9: A hotel is considered a _______ occupancy.
- institutional
- mercantile
- residential
- commercial
10: 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
- over pressure protection and a rupture disc
- Pressure vessels need no type of protection as long as it is hydrostatically tested every three months
11: If a liquid receiver is designed to receive the refrigerant charge during a pumpdown procedure, it shall have the capacity to
- hold up to 110% of the pumpdown charge
- release the charge when the pressure exceeds 310 psig or higher
- Pumpdown procedures are not allowed with systems containing liquid recievers
- receive the pumpdown charge
12: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a
- public assembly occupancy.
- mercantile occupancy
- commercial occupancy
- business occupancy
13: Which is the lowest vacuum?
- 5 psig
- 5" hg
- 10 psia
- 1,000 Microns
14: An electronic bridge circuit is basically a
- high voltage circuit
- 24 volt control circuit
- Wheatstone
- suspension
15: Mercury was used in thermometers primarily because it
- never freezes
- vaporizes at very high temperatures
- expands uniformly
- was inexpensive
16: Megaohm meters can detect a ground in the
- up to 1,000,000 ohms
- up to 10,000 ohms
- up to 1,000 ohms
- 10,000,000 ohms or higher
17: When the compressor is below the condensor
- traps are not needed on this type of system
- traps are needed on the suction line
- traps are needed on the oil return line
- traps are needed on the discharge line
18: Doors communicating with outside from a mechanical room must be?
- Self-closing, approved, fire door
- Self-closing, wooden, fire door
- Steel, approved, weather-stripped
- Self-closing, aligned, fire door
19: Most CFC's are
- inert but toxic
- toxic
- flammable
- inert
20: What is the refrigerant chlorodifluoromethane?
- R-12
- R-123
- R-134a
- R-22
21: What is the purpose of a surge capacitor on a contactor?
- to protect low voltage equipment
- to keep the contactor pulled in
- to balance the sine waves
- to provide smoother start/stops
22: How many refrigerant classifications are there for flammability?
- 3
- 1
- 2
- 7
23: How many CFMs are required per square foot of commercial office occupied space
- 20 CFM
- 15 CFM
- 5 CFM
- .5 CFM
24: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
- UL and UM
- UM or UL
- UV or UR
- UL and UR
25: A check valve is a device
- designed to allow the flow of refrigerant gas in both directions
- that is always spring loaded
- with a pressure drop
- found on high pressure steam systems