Electrical Engineering Online Practice Test 1

Which is the process taking place in a fluoresent tube called?

A fluoresent tube is a low pressure mercury vapour gas discharge lamp that uses fluorescence to produce visible light.

Which of the following is automatic drives?

Sludge formation in transformer oil is due to which of the following?

Oxidization is the acid that form in the oil when it react to oxygen. This acid is sludge which will settle on the heat dissipation from the transformer.

The commutator of a dc machine acts as a

Commutator of a dc machine is used to make flow of current in unidireaction in the external circuit. But for a complete commutation the direction of current does not change in external circuit so it behave as full wave rectifier.

How many outlets are permitted in a power circuit?

Krichhoff's laws are not applicable to circuits with...

The all days efficiency of a distribution transformer will be high with low

A black body when heated to emits the maximum energy in the visible spectrum range.

The fields at any point on tne axis of a current carrying coil will be

The magnetic field at any point on the axis of a current carrying will always parallel to the axis.

Thermocouples are

Thermocouple transducers are those transducers which do not require any power source for their operation.