Electrical Engineering MCQs

Which of the following is an open loop control system?

• Ward Leonard control

• Metadyne

• Stroboscope

• Field controlled D.C. motor

In a control system, the output of the controller is given to:

• Amplifier

• Sensor

• Final control element

• Comparator

What is the relation between output response and input signal in a closed-loop system?

• Nonlinear

• Linear

• Exponential

• Parabolic

In a transmission system, the feeder supplies power to:

• Transformer substations (step-up)

• Service mains

• Distributors

• All of the above

The material used for the manufacture of ground wire is:

• Aluminum

• Galvanized steel

• Cast iron

• Stainless steel

In a transmission line, sag depends upon:

• Span length

• Tension in conductors

• Weight of the conductor per unit length

• All of the above

Transmission lines are transposed to:

• Reduce corona loss

• Reduce skin effect

• Prevent interference with neighboring telephone lines

• Prevent short-circuit between lines

Constant voltage source is:

• Active and bilateral

• Passive and bilateral

• Active and unilateral

• Passive and unilateral

Loops that contain only one link are called:

• Open loops

• Closed loops

• Basic loops

• None of the mentioned

The property of the conductor due to which it passes current is called:

• Resistance

• Reluctance

• Conductance

• Inductance