PLC and Electrical Safety Quiz

What is one advantage of using a PLC in controlling a process?

• It can be programmed and reprogrammed as conditions change.

• It is always cheaper than other systems.

• It cannot be reprogrammed.

• It requires no maintenance.

What happens when a body becomes part of an electrical circuit?

• The voltage increases.

• An electric shock occurs.

• The circuit becomes open.

• The body becomes insulated.

How is current measured in an electrical circuit?

• In watts

• In ohms

• In amperes

• In volts

What is the purpose of grounding in electrical systems?

• To increase voltage

• To provide a direct path for fault current to earth

• To reduce current

• To increase resistance

What is the role of a shielded cable in a PLC system?

• To increase signal strength

• To reduce power consumption

• To block electromagnetic interference

• To increase resistance

What is the purpose of a snubber circuit in a PLC?

• To increase resistance

• To suppress voltage spikes

• To increase voltage

• To reduce current

What is the function of a master control relay in PLC safety?

• To increase voltage

• To increase current

• To remove power from inputs and outputs

• To reduce resistance

What type of clothing should be worn when working with live high voltage circuits?

• Polyester clothing

• Wool clothing

• AR flash protective clothing

• Cotton clothing

What is the purpose of lockout/tagout procedures?

• To reduce current

• To ensure safe maintenance by isolating energy sources

• To prevent unauthorized access

• To increase voltage

What should be done before using rubber insulating gloves?

• They should be frozen.

• They should be heated.

• They should be air tested.

• They should be washed.