ELECTRIC POWER DISTRIBUTION
ENGINEERING 3RD EDITION
COMPREHENSIVE TEST PAPER WITH
SOLVED QUESTIONS
◉ What device controls the output frequency of a ship's service
generator?
Answer: The prime mover's governor
◉ What device prevents an alternating current generator,
operating in parallel, from functioning
as a motor?
Answer: Reverse power relay
◉ What device, if any, varies the field excitation, to maintain a
generator's voltage, through all
normal changes in load?
Answer: Automatic voltage regulator
◉ Which of the following items describes a ground detector's
visual indications if the A phase
lamp is out when the ground detector switch is open?
Answer: lamp A is burned out
, ◉ For what reason are revolving armature generators seldom
used?
Answer: They are subject to arc-over at high voltages
◉ Alternating current generators are divided into what two
classes?
Answer: High speed,turbine drive and low speed engine drive
◉ What function is provided by alternating current generator
exciters?
Answer: Supplies direct current to the field windings
◉ What figure indicates the amount, in degrees, that each phase
of a three-phase generator
differs from the other phases?
Answer: 120
◉ When you use vectors to analyze alternating current circuits,
what type of circuit is indicated
when both the voltage and current are in phase, with a phase
angle of zero?
Answer: Resistive
ENGINEERING 3RD EDITION
COMPREHENSIVE TEST PAPER WITH
SOLVED QUESTIONS
◉ What device controls the output frequency of a ship's service
generator?
Answer: The prime mover's governor
◉ What device prevents an alternating current generator,
operating in parallel, from functioning
as a motor?
Answer: Reverse power relay
◉ What device, if any, varies the field excitation, to maintain a
generator's voltage, through all
normal changes in load?
Answer: Automatic voltage regulator
◉ Which of the following items describes a ground detector's
visual indications if the A phase
lamp is out when the ground detector switch is open?
Answer: lamp A is burned out
, ◉ For what reason are revolving armature generators seldom
used?
Answer: They are subject to arc-over at high voltages
◉ Alternating current generators are divided into what two
classes?
Answer: High speed,turbine drive and low speed engine drive
◉ What function is provided by alternating current generator
exciters?
Answer: Supplies direct current to the field windings
◉ What figure indicates the amount, in degrees, that each phase
of a three-phase generator
differs from the other phases?
Answer: 120
◉ When you use vectors to analyze alternating current circuits,
what type of circuit is indicated
when both the voltage and current are in phase, with a phase
angle of zero?
Answer: Resistive
