Dc Machines Electromagnetic Power Circuit Models Online Exam Quiz
Dc Machines Electromagnetic Power Circuit Models GK Quiz. Question and Answers related to Dc Machines Electromagnetic Power Circuit Models. MCQ (Multiple Choice Questions with answers about Dc Machines Electromagnetic Power Circuit Models
What is the armature current for a DC generator if terminal voltage is observed to be 245V and open circuit voltage is equal to 250V, where armature resistance is 0.05??
Options
A : 10A
B : 100A
C : 1KA
D : 1A
What is the armature current for a DC motor if terminal voltage is 255V and open circuit voltage is equal to 250V, where armature resistance is 0.05??
Options
A : 10A
B : 100A
C : 1KA
D : 1A
For a DC generator feeding 100kW power into 230V mains, having armature resistance and field resistance equal to 0.08? and 115? resp. The value of armature current is_____
Options
A : 436.8 A
B : 434.8 a
C : 432.8 A
D : Data insufficient
For a DC motor taking 10kW power from 230V mains, having armature resistance and field resistance equal to 0.08? and 115? resp. The value of armature current is_____
Options
A : 45.68 A
B : 43.48 a
C : 41.48 A
D : Data insufficient
When torque of the electromagnetic origin is in the opposite direction of rotation of armature, machine is said to be operating in which of the following mode?
Options
A : Depends on other parameters
B : Generating
C : Motoring
D : Inducing
When torque of the electromagnetic origin is in the direction of rotation of armature, machine is said to be operating in which of the following mode?
Options
A : Depends on other parameters
B : Generating
C : Motoring
D : Inducing
When Ea>Vt machine is said to be operating in which of the following mode?
Options
A : Depends on the Shaft speed
B : Generating
C : Motoring
D : Inducing
When Ea<Vt machine is said to be operating in which of the following mode?
Options
A : Depends on the Shaft speed
B : Generating
C : Motoring
D : Inducing
Product of torque and mechanical angular velocity ? is_____
Options
A : Ea/?
B : Ea*Ia
C : ?/Ea
D : Can’t tell
Simple equation of DC machine operating in motoring mode, with non-zero Ra value is________
Options
A : Vt = Ea – Ia/Ra
B : Vt = Ea + Ia*Ra
C : Vt = – Ea + Ia*Ra
D : Vt = Ea – Ia*Ra
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