Dc Machines Online Quiz Online Exam Quiz
Dc Machines Online Quiz GK Quiz. Question and Answers related to Dc Machines Online Quiz. MCQ (Multiple Choice Questions with answers about Dc Machines Online Quiz
Maximum allowable current for a 240-V DC shunt motor is equal to 65 A. Minimum allowable current for same is equal to 40 A. What will be the value of ??
Options
A : 0.6153
B : 1.265
C : 1.625
D : 2.652
What will be the ? value for starter taking 4 steps, where ratio of resistance at maximum allowable current to armature resistance is equal to 1.8?
Options
A : 1.2164
B : 1.8
C : 2.2468
D : 0.8220
For a certain machine having ? = 1.8, we are using starter with 5 steps. What will be the resistance at step 3 if step 2 resistance is equal to 2 ??
Options
A : 2.111
B : 1.111
C : 3.6
D : 10.8
Which of the following starter can sufficiently start the DC series motor?
Options
A : 3-point starter
B : 4-point starter
C : 2-point starter
D : Cannot be determined
NVC will release the handle electromagnetically when ________
Options
A : In the case of failure of field current
B : If the resistance is very high
C : At the end of each rotation
D : At the start of each rotation
Over-load coil performs the function when __________
Options
A : In the case of failure of field current
B : If the resistance is very high
C : If armature current increases beyond certain value
D : At the start of each rotation
How much torque is ensured by resistance adding arrangement in 3-point starter?
Options
A : Low and non-zero
B : Infinite
C : High finite
D : Zero
The resistance of NVC is _______
Options
A : Small
B : Large
C : Infinite
D : Zero
In three-point starter, as a starting handle is rotated __________
Options
A : The resistance is added into armature circuit
B : The resistance is removed from field circuit
C : The resistance is added into field circuit
D : Resistance is neither added nor removed
In 4-point starters the resistance is added in series with NVC because __________________
Options
A : To increase field current
B : To increase armature current
C : To limit the NVC current
D : To limit armature current
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