142 cbt review 1

Which of the following is the difference between the NFPA 70E and IEEE Standard 1584-2002?

• A Use the same methods to calculate flash boundaries and incident energy.
• B Are identical standards from different countries.
• C Are unrelated standards.
• D Use very different methods to calculate flash boundaries and incident energy.

Which of the following is a superheated gas that is created by the arc flash and expands rapidly from the arc location.

• A Incident Energy
• B Plasma
• C X-ray
• D Gamma

The OSHA state that PPE is the ____________________?

• A Is the first line of defence for protecting workers.
• B Should be in nice colours.
• C Is the last line of defence for protecting workers.
• D Deals with people and processes.

What are Hazard Risk Categories used for?

• A To warn you of hazards.
• B To tell you how large a shock you might get from an electrical system.
• C To tell you the voltage level of an electrical system.
• D To select the correct PPE for a given task.

What is system earthing?

• A A connection between part of plant in an operating system and earth
• B Connecting equipment to earth
• C Connecting up all parts of a plant
• D Where the neutral of a power transformer is earthed solidly with a copper conductor

What is a hot stick?

• A A device for removing heat from electric circuits
• B A device for holding up electrical lines while being worked on
• C A device for providing physical separation from the device being operated
• D A device for measuring the voltage level of an electrical system.

How much heat can an arc flash produce?

• A Half of the heat of the sun
• B Twice the heat of the sun
• C Three times the heat of the sun
• D Four times the heat of the sun

What is arc flash energy also called?

• A Noise energy
• B Incident energy
• C W Cal/cm2
• D Sound energy

Which of the is where a flashover of electric current leaves its intended path and travels through the air from one conductor to another, or to ground?

• A Arc Flash
• B Shock Hazard
• C Arc Flash Hazard Analysis
• D Arc Flash Labelling

Which of the is the amount of thermal incident energy workers could be exposed to at working distance during an electrical arc event?

• A Incident Energy
• B Shock Hazard
• C Arc Flash Hazard Analysis
• D Arc Flash Labelling