Understanding Fires and Electricity

What are the classes of fires based on their fuel source?

• Class X, Class Y, Class Z

• Class 1, Class 2, Class 3

• Class A, Class B, Class C, Class D, Class K

• Class F, Class G, Class H

Which class of fire is associated with flammable liquids?

• Class C

• Class B

• Class A

• Class D

What type of fire extinguisher is suitable for electrical fires?

• Class A fire extinguisher

• Class B fire extinguisher

• Class C fire extinguisher

• Class D fire extinguisher

What is the primary function of a water fire extinguisher?

• To create a barrier against flames.

• To cool down hot surfaces.

• To extinguish electrical fires.

• To extinguish fires involving ordinary combustibles.

What are the two main types of electric current?

• Pulsating Current (PC) and Steady Current (SC)

• High Voltage Current (HVC) and Low Voltage Current (LVC)

• Static Current (SC) and Dynamic Current (DC)

• Direct Current (DC) and Alternating Current (AC)

How does alternating current (AC) differ from direct current (DC)?

• AC changes direction periodically; DC flows in one direction.

• AC is always more efficient than DC.

• AC flows in one direction while DC changes direction.

• DC can change direction periodically.

What is the effect of electric current on a conductor?

• Electric current causes the flow of charged particles, generates heat, and creates a magnetic field in a conductor.

• Electric current has no effect on the conductor's properties.

• Electric current reduces the resistance of a conductor.

• Electric current causes the conductor to become transparent.

What component is used to store electrical energy in a circuit?

• Inductor

• Transformer

• Resistor

• Capacitor

What is the role of a resistor in an electrical circuit?

• To create a short circuit for faster current flow.

• To increase the overall voltage in the circuit.

• To store electrical energy for later use.

• The role of a resistor in an electrical circuit is to limit current and control voltage.

What happens to the current in a series circuit when more resistors are added?

• The current remains the same.

• The current increases.

• The current fluctuates randomly.

• The current decreases.