D:-Actual rotor speed
Correct Answer:- Option-B
Question58:-The slip of an induction motor will be low when
A:-Rotor Resistance is low
B:-Friction loss is low
C:-Windage loss is low
D:-Rotor resistance is high
Correct Answer:- Option-A
Question59:-The split rings are made of
A:-Brass
B:-Gunmetal
C:-Bronze
D:-Hard drawn copper
Correct Answer:- Option-D
Question60:-Which motor should not be started on no load?
A:-Shunt motor
B:-Cumulative compound motor
C:-Series motor
D:-Differential compound motors
Correct Answer:- Option-C
Question61:-The barrier potential for a silicon PN junction 15 V.
‏۷۴ھ‎
‎B:-0.7V
‎6۷۷
‎0.۷
‎Correct Answer:- Option-B
Question62:-In which DC generator the armature and field current will be equal?
A:-Shunt
B:-Long shunt compound
C:-Short shunt compound
D:-Series
Correct Answer:- Option-D
Question63:-Which type of starter used to start both shunt and compound DC motor?
A:-Three pointer starter
B:-Two point starter
C:-DOL starter
D:-Star-delta starter
Correct Answer:- Option-A
Question64:-When the speed of altemator increases the frequency?
A:-Decreases
B:-Increases
C:-Remains same
D:-None of the above
Correct Answer:- Option-B
Question65:-Alternators are rated in
കയ
B:-KWH
C:-KVA
D:-Full load current
Correct Answer:- Option-C
Question66:-Most widely used transformer il is
A:-Animal oil
B:-Cooking oil
C:-Vegetable oil
D:-Mineral oil
Correct Answer:- Option-D
Question67:-The line insulators are made up to
A:-Mica
B:-Porcelain clay