ASE-Style Multiple Choice
While having a discussion, Technician A says that the term rustout refers to corrosion that has had time to penetrate completely through the steel panel. Technician B says that rustout is an early stage of corrosion that has not penetrated the steel panel. Who is correct?
A. A only
B. B only
C. Both A and B
D. Neither A nor B
Answer: A
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There are two basic types of oil circuit breakers, the full tank or dead tank type and the low oil or ____ type.
A. half tank B. oil poor C. low tank D. oil-free
A 220 V, dc series motor has an armature current of 86 A, armature resistance of 0.2 ?, and a field resistance of 0.1 ?. The terminal voltage of the motor can be adjusted by means of solid-state devices. Ignore the field saturation.
a. When the motor runs at 600 rpm, the armature current is 20 A. A 0.1 ? resistance is added in shunt to the field windings. If the load torque remains constant, calculate the speed of the motor. b. The resistance in shunt of the field windings is removed. The motor is used to lower the same mechanical torque described in (a) by a countercurrent braking method. The desired speed in the countercurrent braking is 10 rpm. The braking current is twice the rated value. Calculate the armature voltage of the motor.
Answer the following statement(s) true (T) or false (F)
1.Four-wire quad wire is highly recommended for residential telephone installations. 2.A standard network interface box is used when the telephone company terminates their wiring outside the house. 3.Each video, voice, and data outlet location should have a separate homerun back to the service center. 4.A suspended ceiling grid cannot be used to support structured cabling systems. 5.An RJ-45 is a popular six position UTP connector.
A resonant circuit with a high Q ________
A) tunes sharply B) has a small voltage across the capacitor C) has no pass-band D) has a very wide pass-band