Vents shall terminate not less than ______ in vertical height above the highest connected appliance flue collar
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A transformer having 1600 turns in primary winding and 400 turns in secondary winding is supplied with 120 volts AC. What is its secondary voltage.
Wood stud cutting and notching of exterior walls shall not exceed ____________ percent of its depth.
The PVC duct for domestic kitchen cooking appliances equipped with downdraft exhaust system shall extend not more than _____ above the indoor concrete floor surface
Enclosures, cabinets, cut boxes installed in wet locations shall be _______
Mechanical and gravity outdoor air intake openings shall be located not less than _____ horizontally from any hazardous or noxious contaminant source
The design temperature of air to be conveyed in flexible air ducts and flexible air connectors be less than _____.
Mechanical ventilation shall be provided at a rate of not less than _____ cfm per square foot of floor area over the storage area
The rating of feeder tap over current terminating device is 40 Amperes. Which of the following ampacity feeder tap can be used if the conductor length is less than 10 feet?
When an electrical circuit tested with ohmmeter, a short circuit is indicated by a reading of _______.
The transformer output power is 136 VA, what is transformer input power if the transformer efficiency is 85%?
Low-pressure boilers operate at pressures less than or equal to ______ for steam
Masonry chimney flues shall be provided with a cleanout opening having a minimum height of ______
The minimum thickness of the vent connector shall be ___ gage for galvanized steel
A 4 hp 230 V single phase motor has a service factor of 1.15 and name plate current rating of 25 A. What size dual element fuse can be used to protect the motor from overloads, short circuit and ground faults?
Class B Refrigerants shall have toxicity at concentrations below ______ , based on data used to determine TLV-TWA or consistent indices
Liquids having flash points at or above 100°F (38°C) and below 140°F (60°C) comes under ________ combustible liquid
Underground commercial kitchen grease duct installation shall be completely encased in concrete with a minimum thickness of _____ inches
Chimney and vent connectors shall have a minimum clearance of _______ to electric and oil incinerators
The following lamp holder is approved to be installed in either a damp or wet location?