Free Printable MCQ1

Worksheets

MCQ1

Total questions: 10

Worksheet time: 8mins

Name

Class

Date

On the basis of construction, transformer is classified as ________.

single phase and three phase

step-up and step-down

inductive and capacitive

core type and shell type

Function of Step-up and step-down transformer in electrical power system is __________.

To convert AC to DC power.

To store electrical energy for later use.

To regulate current flow in circuits.

To increase or decrease voltage in electrical power systems.

Generating voltage in India is usually _________.

solar

thermal

hydroelectric

nuclear

Safety devices used in distribution power system are ________.

capacitors

voltage regulators

transformers

circuit breakers, fuses, relays, surge protectors

What is voltage regulation?

Voltage regulation refers to the frequency of electrical signals.

Voltage regulation is the measure of current flow in a circuit.

Voltage regulation is the process of increasing voltage levels only.

Voltage regulation is the measure of a system's ability to maintain a constant voltage level under varying load conditions.

__________ voltage is used for power transmission as a matter of economy.

Low

Medium

Variable

High

Different components of Electrical Power System are ____________.

storage, conversion, regulation, monitoring

installation, maintenance, inspection, operation

safety, control, measurement, analysis

generation, transmission, distribution, utilization

A 25kVA transformer has 500 turns on the primary winding and 50 turns on the secondary winding. The primary winding is connected to 3000V,50Hz supply. Calculate secondary emf, full load primary and secondary currents.

Full load secondary current: 50A

Secondary emf: 300V, Full load primary current: 8.33A, Full load secondary current: 83.33A

Full load primary current: 5A

Secondary emf: 150V

A 3200/400V single phase 50Hz transformer has 200 turns on secondary winding. Calculate number of turns in primary winding.

1500 turns

3000 turns

4000 turns

1600 turns

10.

What does transformation ratio signify?

The transformation ratio signifies the voltage between the primary and secondary windings of a transformer.

It represents the frequency of the electrical supply.

It indicates the physical size of the transformer.

It signifies the efficiency of the transformer.

100 %

MCQ1

Total questions: 10

Worksheet time: 8mins

Similar Resources on Wayground