What pressure should never be exceeded in an acetylene hose?
a. 5 psi c. 15 psi
b. 10 psi d. none of these answers is correct
ANS: C
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The reverse voltage is approximately ____ of the zener voltage (EZ).
A. 20% B. 40% C. 60% D. 80%
The metric unit for torque is which of these?
A) Pound-foot B) Newton-meter C) Kilogram-meter D) Foot-pound
An open valley is wider at the bottom than at the top _____
A) to provide a more visually pleasing joint B) for easier cleaning and maintenance C) to accommodate the higher volume of water that will be present near the bottom D) to allow for variations in the width of shingles
What size of a junction box must be used if there is one 4" conduit and two 3" conduits entering on one side of the box and exiting at a 90° angle on another side of the box? (Assume the conductor size is No. 4 AWG or larger.)
a. 30" b. 48" c. 56" d. 60"