What must be provided for all working spaces above service equipment, switchboards and panel boards?
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Steam-Heating Boiler operated at pressures not exceeding ______ for steam
The lightening outlet installed at or near heating, air-conditioning and refrigeration equipment shall be controlled _______
Underground wiring shall be installed in which conduit?
Working space in rooms allocated for electrical equipment shall not be used for _______
A concealed conductor in electrical wiring means
Circuits are equipment operating at less than 50V shall have a lamp holders of rating not less than _______ watts.
Breathing Zone region shall be more than _______ from the walls of the space or from fixed air-conditioning equipment
Positive mechanical ventilation which provides a minimum of ______ complete air changes per hour shall be installed in limited spraying spaces
When an electrical circuit tested with ohmmeter, a open circuit is indicated by a reading of _______
The termination point of exhaust outlets and ducts discharging explosive or flammable vapors, fumes or dusts to the outdoors shall be located with _______ from property lines
Cleanouts serving horizontal sections of grease ducts shall be located not more than _____ from changes in direction that are greater than 45 degrees
The cross-sectional area of a flue serving a solid-fuel-burning appliance shall be not greater than ______ times the cross-sectional area of the appliance flue collar or flue outlet
For stationary small motors rated less than _______, the branch circuit over current device may serve as a controller.
Chimney and vent connectors shall have a minimum clearance of _______ to electric and oil incinerators
The _____ is the current drawn by the motor just as it begins to start but before the rotor begins to rotate
Ozone cabinets and ozone gas-generator rooms for systems having a maximum ozone generating capacity of 1/2 pound (0.23 kg) or more over a 24-hour period shall be mechanically ventilated at a rate of not less than ______ air changes per hour:
If the replacement compressor motor draws 35 amperes current, what is the minimum rating for disconnecting means used to protect the motor?
The conductors sized 1/0 AWG or smaller shall be permitted to be run in parallel for frequencies higher than _______ HZ.
Make up air duct insulation installed within _____ of a Type I commercial kitchen hood shall be noncombustible
Thermocouple converts _____ energy to ______ energy
For determining all welded and brazed joints are liquid tight, a light test shall be performed by passing a lamp having a power rating not less than _____ through the entire section of duct work to be tested.
The light solid lines on an installation diagram shows the low voltage ______ winding
Capacitor motor has:
Which of the following locations would most likely require installation of a ground fault circuit interrupter?
When connecting a voltmeter into a DC circuit, what should be observed?
Insulation resistance is measured using ___
Gasket and sealing materials for duct to exhaust fan connections shall be rated for continuous duty at a temperature of not less than ______
The termination point of all environmental air exhaust outlets and ducts discharging to the outdoors shall be located _____ from property lines:
Frequency in a dc circuit will be ______
Power factor is ______ of the angle between voltage and current wave
Which of the following has negative charge
The effective value of an AC sine wave is equal to the _______ times the maximum value
The individual modular boiler shall be limited to a maximum input rating of ______ Btulh gas
Which of the following is a self-starting motor
In residential buildings, small appliance loads should have two or more _______.
Service factor of the typical motor will be ______
The foam plastic insulation shall be covered by corrosion-resistant steel having a base metal thickness of not less than _____
1 watt power = _______ Btu
The maximum horizontal length of a single-wall connector shall be _______ of the height of the chimney or vent.