Electrical Transformers and Voltage Regulation Quiz

Explore transformer basics with questions on function, types, winding, efficiency, and more. Test your knowledge now!

#1

What is the main function of a transformer?

To increase voltage
To decrease voltage
To convert AC to DC
To convert DC to AC
#2

What is the unit of measurement for magnetic flux?

Tesla
Ampere
Volt
Weber
#3

Which material is commonly used as the core of a transformer?

Steel
Copper
Aluminum
Brass
#4

Which parameter determines the maximum power handling capability of a transformer?

Current rating
Voltage rating
Power factor
KVA rating
#5

What is the typical frequency of the alternating current used in most power distribution systems?

50 Hz
60 Hz
50 kHz
60 kHz
#6

What happens to the magnetic flux in a transformer core when alternating current flows through the primary winding?

It increases
It decreases
It remains constant
It reverses direction
#7

Which type of transformer has more than one winding on the primary and secondary sides?

Step-up transformer
Step-down transformer
Autotransformer
Distribution transformer
#8

What is the purpose of a tap changer in a transformer?

To change the frequency
To change the phase
To adjust the transformer turns ratio
To regulate the output voltage
#9

What is the formula for calculating transformer turns ratio?

Np/Ns
Ns/Np
Ns*Np
Ns+Np
#10

What is the primary reason for using oil in a transformer?

To cool the transformer
To provide insulation
To improve efficiency
To increase the transformer's weight
#11

In a step-up transformer, which side has more turns, the primary or secondary?

Primary
Secondary
Both have the same number of turns
Depends on the transformer design
#12

In a transformer, what does the term 'impedance' refer to?

The resistance of the windings
The ratio of voltage to current
The total opposition to current flow
The efficiency of the transformer
#13

What is the name of the phenomenon where a transformer draws high inrush current when energized?

Flux saturation
Inductive kick
Transformer creep
Inrush current
#14

What is the efficiency of an ideal transformer?

100%
Less than 100%
More than 100%
Depends on the load
#15

What is the effect of placing a load on the secondary side of a transformer?

Increases the primary voltage
Decreases the primary voltage
Increases the secondary voltage
Decreases the secondary voltage
#16

What is the name of the transformer configuration where the primary and secondary windings share a common magnetic core?

Isolation transformer
Autotransformer
Shielded transformer
Resonant transformer
#17

Which type of transformer is used to step-up voltage in power transmission lines?

Distribution transformer
Power transformer
Instrument transformer
Potential transformer

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