NEIEP 400 Final Questions and Answers |
Latest Test Bank with Verified Solutions
| A+ Pass Guaranteed
• Readings on the meter appear to be inaccurate, what should you do? -✓✓Test meter
• A machine that converts mechanical energy into electrical energy -✓✓Generator
• What is the purpose of interpoles in a motor? -✓✓Helps prevent neutral planes from
shifting
• In the basic loop circuit generator armature supplies DC power to what DC elevator
hoist motor component? -✓✓Motor Armature
• If you have leakage resistance to ground, what will you use to test? -✓✓Megger
• What kind of device would you use to measure current without disconnecting wiring? -
✓✓Clamp on ammeter
• What is the synchronous speed of 3 phase, 60 Hz, 6 pole motor? -✓✓1200 RPM
• Before attempting to measure resistance in an unknown resistor in a circuit, what must
be done? -✓✓Isolate from one side
• What is the method used to resolve residual magnetism to an exitor? -✓✓Flashing the
field
• What is the inherent current limiter present for a rotating motor armature called? -
✓✓CEMF
• In order to protect internal circuits, how is the 10 amp input jack on a digital multimeter
usually protected? -✓✓Fused
• What is the field protective relay in series with? -✓✓Motor shunt field
• What material is used as insulation between the commutator and the armature shaft? -
✓✓Mica
• What elements make up commutator film? -✓✓Copper oxide film, graphite film, free
graphite particles and waters vapor components
• What does it mean when saturation occurs? -✓✓Holds all the magnetic lines of flux it
can hold
, • What kind of meter would you use to detect a ground in the armature coils? -
✓✓Ohmmeter
• When should lubrication of motor bearings be done? -✓✓Not running
• What would be the result if a meter set to current and connected to a voltage source? -
✓✓Blow fuse
• When commutation is good, what color is the commutator? -✓✓Chocolate
• What is a precision shunt used for measuring? -✓✓Current
• On a reversible D.C. door operator motor, what angle is the brush mounted? -
✓✓Radially, straight up and down
• What is the significance of the meter specification of ohms per volt? -✓✓Internal
resistance at specific voltage
• On the resistance scale of a digital meter, what does the lazy 8 symbol signify? -
✓✓Infinity
• When some of the generator output is used to supply the field current how is the
generator described? -✓✓Self-exciting
• When the multimeter is set to amps position the test leads are considered to be in
what state? -✓✓Short circuit
• What should resistance of an armature be when measured from commutator to ground
with brushes removed? -✓✓High resistance
• What method of armature winding is used for high current applications? -✓✓lap
winding
• What should always be done to protect the meter from damage when measuring
unknown voltage? -✓✓Set to the highest range
• To what scale should the ammeter be set in order to read a current of 2000 ma? -
✓✓10 amp
• What must be done when testing a resistance to avoid readings caused by parallel
circuit paths? -✓✓Remove one or two of the wire to the item being tested
• 0.790 MΩ indicates? -✓✓790 kΩ
Latest Test Bank with Verified Solutions
| A+ Pass Guaranteed
• Readings on the meter appear to be inaccurate, what should you do? -✓✓Test meter
• A machine that converts mechanical energy into electrical energy -✓✓Generator
• What is the purpose of interpoles in a motor? -✓✓Helps prevent neutral planes from
shifting
• In the basic loop circuit generator armature supplies DC power to what DC elevator
hoist motor component? -✓✓Motor Armature
• If you have leakage resistance to ground, what will you use to test? -✓✓Megger
• What kind of device would you use to measure current without disconnecting wiring? -
✓✓Clamp on ammeter
• What is the synchronous speed of 3 phase, 60 Hz, 6 pole motor? -✓✓1200 RPM
• Before attempting to measure resistance in an unknown resistor in a circuit, what must
be done? -✓✓Isolate from one side
• What is the method used to resolve residual magnetism to an exitor? -✓✓Flashing the
field
• What is the inherent current limiter present for a rotating motor armature called? -
✓✓CEMF
• In order to protect internal circuits, how is the 10 amp input jack on a digital multimeter
usually protected? -✓✓Fused
• What is the field protective relay in series with? -✓✓Motor shunt field
• What material is used as insulation between the commutator and the armature shaft? -
✓✓Mica
• What elements make up commutator film? -✓✓Copper oxide film, graphite film, free
graphite particles and waters vapor components
• What does it mean when saturation occurs? -✓✓Holds all the magnetic lines of flux it
can hold
, • What kind of meter would you use to detect a ground in the armature coils? -
✓✓Ohmmeter
• When should lubrication of motor bearings be done? -✓✓Not running
• What would be the result if a meter set to current and connected to a voltage source? -
✓✓Blow fuse
• When commutation is good, what color is the commutator? -✓✓Chocolate
• What is a precision shunt used for measuring? -✓✓Current
• On a reversible D.C. door operator motor, what angle is the brush mounted? -
✓✓Radially, straight up and down
• What is the significance of the meter specification of ohms per volt? -✓✓Internal
resistance at specific voltage
• On the resistance scale of a digital meter, what does the lazy 8 symbol signify? -
✓✓Infinity
• When some of the generator output is used to supply the field current how is the
generator described? -✓✓Self-exciting
• When the multimeter is set to amps position the test leads are considered to be in
what state? -✓✓Short circuit
• What should resistance of an armature be when measured from commutator to ground
with brushes removed? -✓✓High resistance
• What method of armature winding is used for high current applications? -✓✓lap
winding
• What should always be done to protect the meter from damage when measuring
unknown voltage? -✓✓Set to the highest range
• To what scale should the ammeter be set in order to read a current of 2000 ma? -
✓✓10 amp
• What must be done when testing a resistance to avoid readings caused by parallel
circuit paths? -✓✓Remove one or two of the wire to the item being tested
• 0.790 MΩ indicates? -✓✓790 kΩ
