What is the essential difference between an A-Train and a C-Train?

A. C-Train is longer
B. A-Train is longer
C. C-Train has a rigid double-drawbar system
D. A-Train has more pivot points


Answer: C

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Find the length of valley jack rafter E in the accompanying figure.

A. 48 7/16" B. 48 9/16" C. 48 11/16" D. 48 13/16"

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Service entrance cables must be supported by straps or staples within __________ inches of any electrical enclosure or weatherhead and at intervals not exceeding __________ inches.

a. 8, 24 b. 12, 24 c. 8, 30 d. 12, 30

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What material should clothes worn during welding be made of?

A) A polyester, nylon, acetate blend B) 100% Cotton C) 65% polyester - 35% nylon D) 100% polyester

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Which type of space heater is generally the most expensive to operate?

A) Electric space heater B) Kerosene space heater C) Vented gas space heater D) Unvented gas space heater

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