A8 Ch4 Motors Question and answers rated A+ 2024/2025
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Module
BOIE 8010
Institution
BOIE 8010
A8 Ch4 Motors Question and answers rated A+ 2024/2025 A8 Ch4 Motors & Generators
_____ are used on motors and generators, to set up a magnetic field.
A)
Insulated wires
B)
Transformers
C)
Mica strips
D)
Field poles
E)
Carbon rings - correct answer d
The magnetic field i...
A8 Ch4 Motors & Generators
_____ are used on motors and generators, to set up a magnetic field.
A)
Insulated wires
B)
Transformers
C)
Mica strips
D)
Field poles
E)
Carbon rings - correct answer ✔d
The magnetic field in a DC machine may be supplied by permanent magnets
in small units. Large DC machines use field poles that are essentially:
A)
Non-magnetic
B)
,Electromagnets
C)
Resistors
D)
Flux resistant
E)
Insulators - correct answer ✔b
Alternators are constructed to use slip rings made of brass or:
A)
Steel
B)
Silicon
C)
Copper
D)
Carbon
E)
,Mica - correct answer ✔a
Motor starting devices for DC motors and some AC motors are designed to
limit the starting _____ to a safe value.
A)
Voltage
B)
Current
C)
Speed
D)
Resistance
E)
Torque - correct answer ✔b
An AC motor which will drop out of synchronism and simply trip when
overloaded is the:
A)
Slip-ring induction motor
B)
, Induction motor
C)
Single phase motor
D)
Synchronous motor
E)
Wound rotor induction motor - correct answer ✔d
Shunt wound DC motors are common where speed must remain constant
regardless of load such as on:
A)
Traction engines
B)
Automobile starters
C)
Machinist lathes
D)
Grinders
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