As a safety precaution, electric duct heaters should be wired so that they will not operate unless:
A) Other forms of heat are not operating. B) The fan is operating.
C) Extra heat is needed. D) The second stage of the thermostat is closed.
B
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? Size and physical characteristics should be reviewed by both the contractors and the _______________.
Fill in the blank(s) with the appropriate word(s).
A mil is approximately equal to:
a. 2? radians b. ? radians c. 1/360 of the circumference of a circle d. 60? e. 1/6,400 of the circumference of a circle
Evaluate Req looking into each set of terminals for each of the circuits shown in Fig. 2.103.
 FIGURE 1.png)
Technician A says brake tubing should be double flared or ISO flared. Technician B says an ISO tubing seat must be used with the ISO flare. Who is correct?
A. A only B. B only C. Both A and B D. Neither A nor B