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Commercial kitchen Exhaust outlets that terminate above the roof shall have the discharge opening located not less than _____ above the roof surface:
40 inches
The foam plastic insulation shall be covered by corrosion-resistant steel having a base metal thickness of not less than _____ :
0.4 mm
Ducts that operate at temperatures exceeding ______ shall have sufficient thermal insulation to limit the exposed surface temperature
120°F
Gas appliances listed and labeled for venting with _____ vents:
Type B
The individual modular boiler shall be limited to a maximum input rating of ______ Btulh gas:
400,000
What must be provided for all working spaces above service equipment, switchboards and panel boards?
Illumination
Class II locations are those that are hazardous because of the presence of _______
_______
combustible dust
Which of the following is an enclosed channel specially designed for holding wires, busbars?
A raceway
How many watt-meters are required to measure the power in balanced three phase star connected circuit?
1
Gasket and sealing materials for duct to exhaust fan connections shall be rated for continuous duty at a temperature of not less than ______ :
1500oF
Exhaust Openings in screens, louvers and grilles terminating at outdoor shall be sized not less than ______ :
1/4inch
Class B Refrigerants shall have toxicity at concentrations below ______ , based on data used to determine TLV-TWA or consistent indices:
400 ppm
The maximum wattage of incandescent-lamps must not exceed _______that may be used on medium bus lampholders.
300 watts
If a 30 amperes snap switch is used as disconnecting means of a 3-horse power motor, what shall be the maximum full load current of the motor?
24 amperes
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