Engineering MCQs

a. L
b. D
c. C
d. R
Answer: a. L

a. To store electrical charge
b. To amplify electrical signals
c. To regulate voltage
d. To control the flow of current in a circuit
Answer: d. To control the flow of current in a circuit

a. AC current flows in one direction only, while DC current flows in both directions.
b. AC current changes direction periodically, while DC current flows in one direction only.
c. AC current flows at a higher voltage than DC current.
d. AC current is only used in residential applications, while DC current is only used in industrial applications.
Answer: b. AC current changes direction periodically, while DC current flows in one direction only.

a. A conductor allows electricity to flow through it easily, while an insulator does not.
b. A conductor and an insulator are the same thing.
c. A conductor is used for low-voltage applications, while an insulator is used for high-voltage applications.
d. A conductor is always on, while an insulator is always off.
Answer: a. A conductor allows electricity to flow through it easily, while an insulator does not.

a. M
b. D
c. C
d. R
Answer: a. M

a. A circuit breaker can be reset, while a fuse needs to be replaced.
b. A circuit breaker is more expensive than a fuse.
c. A circuit breaker is used for low-voltage applications, while a fuse is used for high-voltage applications.
d. A circuit breaker is less reliable than a fuse.
Answer: a. A circuit breaker can be reset, while a fuse needs to be replaced.

a. V = I/R
b. V = R/I
c. V = P/I
d. V = sqrt(P*R)
Answer: a. V = I/R

a. Joule
b. Watt
c. Ohm
d. Volt
Answer: c. Ohm

a. An open circuit has a break in the circuit path, while a closed circuit does not.
b. An open circuit is only used in AC circuits, while a closed circuit is only used in DC circuits.
c. An open circuit is always on, while a closed circuit is always off.
d. An open circuit has a higher voltage than a closed circuit.
Answer: a. An open circuit has a break in the circuit path, while a closed circuit does not.

a. There is no difference between the two circuit types.
b. In a series-parallel circuit, some components are connected in series and others in parallel, while in a parallel-series circuit, the opposite is true.
c. In a series-parallel circuit, all components are connected in both series and parallel, while in a parallel-series circuit, only some components are connected in both series and parallel.
d. In a series-parallel circuit, all components are connected in parallel, while in a parallel-series circuit, all components are connected in series.
Answer: b. In a series-parallel circuit, some components are connected in series and others in parallel, while in a parallel-series circuit, the opposite is true.