NEIEP 400 Final review exam 2023
(all answered 100% Correct)
What material should be used for seating brushes? - -Sandpaper
-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
(all answered 100% Correct)
What material should be used for seating brushes? - -Sandpaper
-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
