QUIZ 1 SAFETY DEVICES

It consists of a high resistance strip of alloy that melts readily.

• Fuse

• Circuit breaker

• Grounding

• Earth wire

Which of the following is not an example of safety device?

• fuse

• circuit breaker

• earth wire

• battery

A large switch that is opened automatically by an electromagnet when the current is large.

• earth wire

• circuit breaker

• grounding

• RCD's

Tags

NGSS.MS-ETS1-2

Is an electrical connection between the appliance and the earth or any conductor with zero potential?

• Double insulation

• Circuit breaker

• Grounding

• RCD's

Why are fuses and circuit breakers used in circuits?

• Fuses and circuit breakers open to the circuit when a large amount of current flows through the circuit.

• Fuses and circuit breakers increase the efficiency of the appliances within the circuit.

• Fuses and circuit breakers insulate the connection in the circuit.

• Fuses and circuit breakers can help out the electrical consumption.

It has two layers of insulating material that covers the live wires.

• Circuit breaker

• RCD's

• Earthing

• Double insulation

Tags

NGSS.MS-ETS1-2

A device that quickly breaks an electrical circuit to prevent serious harm from ongoing electric shock.

• transformer

• RCD's

• earth wire

• fuse

Tags

NGSS.MS-ETS1-2

Which of the following is an example of safety device at home?

• copper wire

• battery

• circuit breaker

• bulb

Tags

NGSS.MS-PS3-5

NGSS.MS-ETS1-1

Your fuse at home has “blown” up many times. Which of the following will you do to solve this problem and prevent it from happening again?

• Connect appliances in series instead of parallel.

• Do not use too many appliances at the same time.

• Plug two or three appliances in one outlet.

• Connect an additional fuse to your circuit.

Tags

NGSS.MS-ETS1-2

NGSS.MS-ETS1-1

• Correct

• Incorrect

Tags

NGSS.MS-PS3-5