Electrical Machines Dc Machine Applications Online Exam Quiz
Electrical Machines Dc Machine Applications GK Quiz. Question and Answers related to Electrical Machines Dc Machine Applications. MCQ (Multiple Choice Questions with answers about Electrical Machines Dc Machine Applications
Maximum torque in dc series motor is limited by __________
Options
A : commutation
B : heating
C : field control
D : all of the mentioned
There is an application which required pulsating loads, punch presses. The most preferred machines would be __________
Options
A : compound dc machine
B : series dc machine
C : shunt dc machine
D : all of the mentioned
If a dc shunt motor is stopped by forcing starter handle back to OFF position, then the __________
Options
A : dangerous sparking occurs at last stud
B : dangerous sparking occurs at all stud
C : it stops normally
D : heavy sparking
Hoists, cranes and battery powered vehicles use _________ motors in the locomotive.
Options
A : dc series
B : dc shunt
C : induction
D : reluctance
The manufacturer has mentioned a medium starting torque and 15% speed regulation. Which is the most appropriate motor for this requirement?
Options
A : dc shunt motor
B : induction motor
C : differential motor
D : none of the mentioned
Most commercial compound dc generator are normally supplied by manufacturers as over compound machines because __________
Options
A : degree of compounding can be adjusted by diverters acrosss series field
B : they have ideally best for HVDC
C : cost effective than shunt
D : zero percent regulation
A d.c. generator has been provided tappings on the armature winding at intervals of 120 degrees from the side of commutator. The connection will be __________
Options
A : delta connected alternator
B : star connected alternator
C : star connected induction motor
D : any of the mentioned
Inspite of heavy initial investments, dc motors are used due to _____________
Options
A : flexibility and ease of control
B : lower losses
C : improved power factor of the system
D : all of the mentioned
Which of the following are applied with differential compound motor?
Options
A : Hoist
B : Cranes
C : Drilling machines
D : None of the mentioned
Long back ago, magnetic casette were in use, having permanent magnet dc motors which had?
Options
A : magnets on stator and armature on rotor
B : magnet on rotor and armature on stator
C : electronic commutation
D : all of the mentioned
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