FREE AND STUDY GAMES ABOUT THEORY - MIKE HOLT

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FREE AND STUDY GAMES ABOUT THEORY - MIKE HOLT

EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -87 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: Metal parts of premises wiring must be bonded to a low impedance path designed so that the circuit protection device will quickly open and clear a ground fault.(A) True (B) false

Answer:

A-true Question 2: AC inductive or capacitive reactive loads cause the voltage and current to be in-phase with one another.(A) True (B) False

Answer:

B- False Question 3: The motor FLA rating is used when sizing motor conductor size or circuit protection.(A) True (B) False

Answer:

B- false

Question 4: In a(n)___ motor, the rotor is locked in step with the totating stator field and is dragged along at the speed of the rotating magnetic feild.(A) wound-rotor (B) induction (C) synchronous (D) squirrel-cage

Answer:

C- synchronous Question 5: Lightning protection is intended to protect the building itself, as well as the electrical equipment on or inside the structure.(A) True (B)False

Answer:

B-false Question 6: Rotating part of motor jammed, no rotation, no CEMF produced in winding. Results the motor operates @ ____ & the windings will be destroyed by excessive heat.

(A)FLA

(B)FLC

(C)LRC

(D)any of these

Answer:

C- LRC

Question 7: A holding relay is primarily used for worker convenience.

(A) True (B) False

Answer:

B- false Question 8: Because of the earth's high resistance to current flow, it cannot be used for the purpose of clearing a line-to-case ground fault _______ wiring.(A) utility (B) premises (C) a or b (D) none of these

Answer:

B- premises

Question 9: Improper wiring of mishandling of multi-wire branch circuits can cause ____ connected to the circuit.(A) overloading of the ungrounded conductors (B) overloading of the neutral conductors (C) destruction of equipment because of over voltage (D) b & c

Answer:

D- b & c Question 10: Wasteful circulating ____ in the iron core cause(s) the core to heat up without any useful purpose.(A) conductor resistance (B) flux leakage (C) eddy currents (D) hysteresis losses

Answer:

C- eddy currents Question 11: The termination of the lightning strike is likely to ignite combustible materials.(A) True (B)False

Answer:

B- false Question 12: Equipment must have a(n) ____ current rating that permits the protection device to clear a short circuit or ground fault without extensive damage to the components of the circuit.(A) overload (B) short circuit (C) ground-fault (D) b or C

Answer:

B- short circuit Question 13: People become injured and death occurs when voltage pushes through the human body causing the heart to go into ventricular fibrillation.(A) True (B)False

Answer:

A-true

Question 14: Arcing is defined as a luminous discharge of electricity an insulating medium.Electric arcs. Operate at tempatures between ____ and expel small particles of very hot molten material.(A) 10,000 & 25,000 F (B) 2,000 & 10,000 F (C) 5,000 & 15,000 F

Answer:

C- 5,000 & 15,000 F

Arc blasts can reach 30,000 F Question 15: The energy transfer ability of a transformer is accomplished because the primary electromagnetic lines of foce induce a coltage in teh secondary winging.(A) True (B) False

Answer:

A- true Question 16: Severe electric shock or death can occur if a person touches the ungrounded and the neutral conductors at the same time, even if the circuit is GFCI- protected.(A) True (B) false

Answer:

A- True Question 17: ____ motors are fractional HP motors that operate equally well on ac & dc & are used for vacuum cleaners, electric drills, mixers, and light household appiances.

(A) AC

(B) Universal (C) wound-rotor (D) syncronous

Answer:

B- Universal Question 18: Providing a path to the earth often helps reduce electrostatic charge.(A) True (B)False

Answer:

A- true