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Ozone layer absorbs sun’s which of the following radiation and prevents it from falling on earth’s surface:
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In Psychrometric chart curved boundary indicates which of the following:
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A safety belt lanyard shall be a minimum of 1/2" nylon, or equivalent, with a maximum length to provide for a fall of no greater than _______ feet.
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Where openings below grade provide required natural ventilation, the outside horizontal clear space measured perpendicular to the opening shall be ________ times the depth of the opening.
Interior spaces intended for human occupancy shall be provided with active or passive space-heating systems capable of maintaining a minimum of ______ degrees at a point 3 feet above floor on the design heating day.
Electrical wiring, contols and connections to equipment and appliances regulated by this code shall be in accordance with __________.
If you add refrigerant to an airconditioner that has an external equalized TXV, the subcooling will _________.
The equivalent length of a 8" diameter mitered 90 degree elbow is _________.
What is the minimum openable area required for natural ventilation?
Passageways around boilers shall have an unobstructed width of not less than _______ inches.
The minimum size cast iron pipe that can be utilized for gas piping is _________.
Which of the following compounds have less severe effect on ozone layer:
Temperature determines the amount of water vapor that air can hold
Maximum amount of water vapor air can hold _____ with temperature:
At 100% air saturation wet bulb temperature is equal to dry bulb temperature
Which of the following air has higher specific volume:
The condensate line for a 20 ton package unit will be a minimum of ______ diameter.
Liquid adhesive coatings used on filters shall have a flash point not lower than _______ degrees.
