When delegating, the crew leader should make sure the crew member understands what to do and _____.

a. the degree of risk involved
b. has read the OSHA regulations
c. who should be blamed if there is a problem
d. their level of responsibility


d. their level of responsibility

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____________________ is generally used to help the electrician interpret the meaning of certain components and find contacts that are controlled by coils.

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

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Corresponding sides of similar polygons are proportional.

Answer the following statement true (T) or false (F)

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Under normal conditions, in order to engage the parking brakes the driver should:

a. Turn off the engine. b. Apply brakes by pulling the parking brake control knob out. c. Be sure air brakes system is fully pressurized.

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Consider the LED driver circuit of Figure 10.17. This circuit is now used to drive an automotive fuel injector (an electromechanical solenoid valve). The differences in the circuit are as follows: The collector resistor and the LED are replaced by the fuel injector, which can be modeled as a series RL circuit. The voltage supply for the fuel injector is 13 V (instead of 5 V). For the purposes of this problem, it is reasonable to assume R = 12 ? and L ? 0. Assume that the maximum current that can be supplied by the microprocessor is 1 mA, that the current required to drive the fuel injector must be at least 1 A, and that the transistor saturation voltage is VCEsat = 1 V. Find the minimum value of ? required for the transistor.


Known quantities:
For the circuit shown in Figure 10.14 in the text:

Find:
Minimum value of ? that will ensure the correct operation of the fuel injector.

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