NEIEP 400 Final Review Exam Questions With Accurate
Solutions.
What material should be used for seating brushes? - accurate answers-
Sandpaper
Readings on the meter appear to be inaccurate, what should you do? -
accurate answers-Test meter
A machine that converts mechanical energy into electrical energy - accurate
answers-Generator
What is the purpose of interpoles in a motor? - accurate answers-Helps
prevent neutral planes from shifting
In the basic loop circuit generator armature supplies DC power to what DC
elevator hoist motor component? - accurate answers-Motor Armature
If you have leakage resistance to ground, what will you use to test? - accurate
answers-Megger
What kind of device would you use to measure current without disconnecting
wiring? - accurate answers-Clamp on ammeter
What is the synchronous speed of 3 phase, 60 Hz, 6 pole motor? - accurate
answers-1200 RPM
Before attempting to measure resistance in an unknown resistor in a circuit,
what must be done? - accurate answers-Isolate from one side
What is the method used to resolve residual magnetism to an exitor? -
accurate answers-Flashing the field
What is the inherent current limiter present for a rotating motor armature
called? - accurate answers-CEMF
In order to protect internal circuits, how is the 10 amp input jack on a digital
multimeter usually protected? - accurate answers-Fused
, What is the field protective relay in series with? - accurate answers-Motor
shunt field
What material is used as insulation between the commutator and the
armature shaft? - accurate answers-Mica
What elements make up commutator film? - accurate answers-Copper oxide
film, graphite film, free graphite particles and waters vapor components
What does it mean when saturation occurs? - accurate answers-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? -
accurate answers-Ohmmeter
When should lubrication of motor bearings be done? - accurate answers-Not
running
What would be the result if a meter set to current and connected to a voltage
source? - accurate answers-Blow fuse
When commutation is good, what color is the commutator? - accurate
answers-Chocolate
What is a precision shunt used for measuring? - accurate answers-Current
On a reversible D.C. door operator motor, what angle is the brush mounted? -
accurate answers-Radially, straight up and down
What is the significance of the meter specification of ohms per volt? - accurate
answers-Internal resistance at specific voltage
On the resistance scale of a digital meter, what does the lazy 8 symbol signify?
- accurate answers-Infinity
When some of the generator output is used to supply the field current how is
the generator described? - accurate answers-Self-exciting
Solutions.
What material should be used for seating brushes? - accurate answers-
Sandpaper
Readings on the meter appear to be inaccurate, what should you do? -
accurate answers-Test meter
A machine that converts mechanical energy into electrical energy - accurate
answers-Generator
What is the purpose of interpoles in a motor? - accurate answers-Helps
prevent neutral planes from shifting
In the basic loop circuit generator armature supplies DC power to what DC
elevator hoist motor component? - accurate answers-Motor Armature
If you have leakage resistance to ground, what will you use to test? - accurate
answers-Megger
What kind of device would you use to measure current without disconnecting
wiring? - accurate answers-Clamp on ammeter
What is the synchronous speed of 3 phase, 60 Hz, 6 pole motor? - accurate
answers-1200 RPM
Before attempting to measure resistance in an unknown resistor in a circuit,
what must be done? - accurate answers-Isolate from one side
What is the method used to resolve residual magnetism to an exitor? -
accurate answers-Flashing the field
What is the inherent current limiter present for a rotating motor armature
called? - accurate answers-CEMF
In order to protect internal circuits, how is the 10 amp input jack on a digital
multimeter usually protected? - accurate answers-Fused
, What is the field protective relay in series with? - accurate answers-Motor
shunt field
What material is used as insulation between the commutator and the
armature shaft? - accurate answers-Mica
What elements make up commutator film? - accurate answers-Copper oxide
film, graphite film, free graphite particles and waters vapor components
What does it mean when saturation occurs? - accurate answers-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? -
accurate answers-Ohmmeter
When should lubrication of motor bearings be done? - accurate answers-Not
running
What would be the result if a meter set to current and connected to a voltage
source? - accurate answers-Blow fuse
When commutation is good, what color is the commutator? - accurate
answers-Chocolate
What is a precision shunt used for measuring? - accurate answers-Current
On a reversible D.C. door operator motor, what angle is the brush mounted? -
accurate answers-Radially, straight up and down
What is the significance of the meter specification of ohms per volt? - accurate
answers-Internal resistance at specific voltage
On the resistance scale of a digital meter, what does the lazy 8 symbol signify?
- accurate answers-Infinity
When some of the generator output is used to supply the field current how is
the generator described? - accurate answers-Self-exciting
