The _____ is the horizontal distance covered by a single rafter in a gable roof.
A. run
B. span
C. rise
D. pitch
Answer: A
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Which of the following is an NEC Article 427 requirement for the installation of electrical heat-tracing cables on pipe and vessels in unclassified areas?
a. The external surfaces of any equipment that operates at temperatures above 100°F (38°C) must be physically guarded, isolated, or thermally protected. b. Branch circuits and overcurrent devices supplying the equipment must be sized at no less than 100 percent of the total heater load. c. The heating cable cannot be allowed to make direct contact with the pipe or vessel. d. The presence of electric heating equipment must be identified using permanent caution signs or markings at the specified intervals.
Scabies is caused by _____
a. a burrowing mite b. an allergic reaction c. pinworms d. flea infestations
The most common type of starter drive is the ____.
A. compound motor B. drive pinion C. Bendix drive D. overrunning clutch
A wye-delta transformer has its _____ connected as a wye and its _____ connected as a delta.
A. secondary; primary B. primary; secondary