How do infrared heaters transfer heat?

A) Air is circulated over them and distributed via ductwork
B) They heat the air molecules and the air heats the people in the room
C) They directly heat people and objects through rays
D) They only heat objects that they are touching


C

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How long is the W-beam shown in Figure 3?

a. 12 b. 22-1/2 c. 50-1/2 d. 72

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Technician A says that the ring ridge does not need to be removed if the pistons come out of the block easily. Technician B says that when installing a flywheel ring gear, heat it until it is red hot. Who is right?

A. Technician A B. Technician B C. Both technicians D. Neither technician

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The higher the _____ content in the soil, the more slowly pesticide-contaminated water moves through it

a. Nitrogen c. Clay b. Water d. Sand

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Structural steels are produced in a variety of grades. _______________ steels are the most economical on a cost-perpound basis, but they have the lowest strength.

Fill in the blank(s) with the appropriate word(s).

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