Circuit Protection

Circuit protection devices are used for which of the following purposes?

• To protect people

• To protect circuits

• To guard against hazardous conditions

• All of the above

How are circuit protection devices connected to the circuit they are protecting?

• Alongside

• In series

• In parallel

• In series-parallel

Which of the following two are circuit protection devices?

• Electrical plugs and CO2 cartridges

• CO2 cartridges and circuit breakers

• Fuses and circuit breakers

• Fuses and electrical plugs

Which of the following is the schematic symbol for a fuse?

• A

• B

• F

• G

Which of the following is the schematic symbol for a circuit breaker?

• A

• B

• F

• G

Which of the following is an illustration of an open cartridge fuse?

• C

• D

• E

• I

Which of the following is an illustration of a good cartridge fuse?

• C

• D

• E

• I

Which of the following is an illustration of a good plug-type fuse?

• C

• D

• E

• H

Which of the following is an illustration of an open plug-type fuse?

• C

• D

• E

• H

Which of the following factors is NOT used to rate fuses?

• Size

• Current

• Voltage

• Time delay