1.  The schematic symbol for a resistor is

                a.     A triangle

                b.     A rectangle

                c.     A circle

                d.    A solid line

        2. What two factors control the output of the main generator on a switcher locomotive?

                a.     Field strength in the generator

                b.     Diesel engine speed

                c.     Battery voltage

                d.    a. and b.

        3.    What device controls field strength in the Auxiliary Generator?

                a.     The voltage regulator

                b.    The load regulator

                c.     The governor

                d.     The throttle