TPC 206 DC Equipment & Controls exam
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with answers |\
The main parts of a dc generator are the field poles, end
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plates, brushes and brush rigging, commutator, frame,
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and
armature
coupling
end bells |\
motor starter - CORRECT ANSWERS ✔✔armature
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All dc motor windings carrying full-load current should be
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examined occasionally for signs of ____________ caused by
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poor or loose connections.
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chattering
low torque|\
overheating
worn bearings - CORRECT ANSWERS ✔✔overheating
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,One advantage of dc motors over ac motors is that a dc
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
motor
experiences lower power losses |\ |\ |\
is easier to rewire to run on a difference potential
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
difference
offers better speed control
|\ |\ |\
provides more efficient power distribution - CORRECT
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ANSWERS ✔✔offers better speed control |\ |\ |\ |\
In an SCR schematic, G stands for gate and K stands for
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cathode
compressed
kilowatt
kvar - CORRECT ANSWERS ✔✔cathode
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Which type of power loss varies with the speed of a dc
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armature and the volume of iron in the core?
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Commutation loss |\
Copper loss |\
Eddy-current loss |\
, Hysteresis loss - CORRECT ANSWERS ✔✔Hysteresis loss
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Incorrect seating of its plunger can cause a solenoid to
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draw too much current
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move slowly through its range
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produce a slamming action |\ |\ |\
shear its mounting bolts - CORRECT ANSWERS ✔✔draw
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too much current
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If you double the distance between two magnetic poles,
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the magnetic force is
|\ |\ |\
doubled
unchanged
cut in half
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reduced to 25% - CORRECT ANSWERS ✔✔reduced to 25%
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A single-coil generator produces
|\ |\ |\
pulsating dc |\
SCR triggering
|\
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with answers |\
The main parts of a dc generator are the field poles, end
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
plates, brushes and brush rigging, commutator, frame,
|\ |\ |\ |\ |\ |\ |\
and
armature
coupling
end bells |\
motor starter - CORRECT ANSWERS ✔✔armature
|\ |\ |\ |\ |\
All dc motor windings carrying full-load current should be
|\ |\ |\ |\ |\ |\ |\ |\ |\
examined occasionally for signs of ____________ caused by
|\ |\ |\ |\ |\ |\ |\
poor or loose connections.
|\ |\ |\ |\
chattering
low torque|\
overheating
worn bearings - CORRECT ANSWERS ✔✔overheating
|\ |\ |\ |\ |\
,One advantage of dc motors over ac motors is that a dc
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
motor
experiences lower power losses |\ |\ |\
is easier to rewire to run on a difference potential
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
difference
offers better speed control
|\ |\ |\
provides more efficient power distribution - CORRECT
|\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔offers better speed control |\ |\ |\ |\
In an SCR schematic, G stands for gate and K stands for
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
cathode
compressed
kilowatt
kvar - CORRECT ANSWERS ✔✔cathode
|\ |\ |\ |\
Which type of power loss varies with the speed of a dc
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
armature and the volume of iron in the core?
|\ |\ |\ |\ |\ |\ |\ |\
Commutation loss |\
Copper loss |\
Eddy-current loss |\
, Hysteresis loss - CORRECT ANSWERS ✔✔Hysteresis loss
|\ |\ |\ |\ |\ |\
Incorrect seating of its plunger can cause a solenoid to
|\ |\ |\ |\ |\ |\ |\ |\ |\
draw too much current
|\ |\ |\
move slowly through its range
|\ |\ |\ |\
produce a slamming action |\ |\ |\
shear its mounting bolts - CORRECT ANSWERS ✔✔draw
|\ |\ |\ |\ |\ |\ |\ |\
too much current
|\ |\
If you double the distance between two magnetic poles,
|\ |\ |\ |\ |\ |\ |\ |\ |\
the magnetic force is
|\ |\ |\
doubled
unchanged
cut in half
|\ |\
reduced to 25% - CORRECT ANSWERS ✔✔reduced to 25%
|\ |\ |\ |\ |\ |\ |\ |\
A single-coil generator produces
|\ |\ |\
pulsating dc |\
SCR triggering
|\
