What is a safety rule for climbing a ladder?
a. look upward only when necessary
b. avoid holding onto the beams during the climb
c. carry, rather than hoist, tools whenever possible
d. avoid standing with both feet on the same rung
Answer: a. look upward only when necessary
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The term ____________________ fraction refers to dimensions such as 1/64, 1/32, 1/16, 1/8, 1/4, and 1/2 inch.
Fill in the blank(s) with the appropriate word(s).
Fiber optic cables are composed of three sections: the core, the ____, and the sheath.
A. jacket B. cladding C. skin D. center
Answer the following statement(s) true (T) or false (F)
1. In the United States and Canada, power is generated as a three-phase 50-hertz voltage. 2. An alternator is a generator that produces AC voltage. 3. Wye-connected systems often use a fourth conductor connected to the back of the connection. 4. A type of three-phase service is known as the open delta. 5. The three-pole breaker cannot be used in a single-phase panel.
This metal, known as sterling, is alloyed with 8 to 10 percent copper for use in jewelry and coins and household items and is 925/1000 pure.
a. gold b. silver c. platinum d. titanium