Worksheets142 cbt review 1
Total questions: 16
Worksheet time: 1hrs 20mins
Name
Class
Date
1.
Which of the following is the difference between the NFPA 70E and IEEE Standard 1584-2002?
a)
A Use the same methods to calculate flash boundaries and incident energy.
b)
B Are identical standards from different countries.
c)
C Are unrelated standards.
d)
D Use very different methods to calculate flash boundaries and incident energy.
2.
Which of the following is a superheated gas that is created by the arc flash and expands rapidly from the arc location.
a)
A Incident Energy
b)
B Plasma
c)
C X-ray
d)
D Gamma
3.
The OSHA state that PPE is the ____________________?
a)
A Is the first line of defence for protecting workers.
b)
B Should be in nice colours.
c)
C Is the last line of defence for protecting workers.
d)
D Deals with people and processes.
4.
What are Hazard Risk Categories used for?
a)
A To warn you of hazards.
b)
B To tell you how large a shock you might get from an electrical system.
c)
C To tell you the voltage level of an electrical system.
d)
D To select the correct PPE for a given task.
5.
What is system earthing?
a)
A A connection between part of plant in an operating system and earth
b)
B Connecting equipment to earth
c)
C Connecting up all parts of a plant
d)
D Where the neutral of a power transformer is earthed solidly with a copper conductor
6.
What is a hot stick?
a)
A A device for removing heat from electric circuits
b)
B A device for holding up electrical lines while being worked on
c)
C A device for providing physical separation from the device being operated
d)
D A device for measuring the voltage level of an electrical system.
7.
How much heat can an arc flash produce?
a)
A Half of the heat of the sun
b)
B Twice the heat of the sun
c)
C Three times the heat of the sun
d)
D Four times the heat of the sun
8.
What is arc flash energy also called?
a)
A Noise energy
b)
B Incident energy
c)
C W Cal/cm2
d)
D Sound energy
9.
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)
A Arc Flash
b)
B Shock Hazard
c)
C Arc Flash Hazard Analysis
d)
D Arc Flash Labelling
10.
Which of the is the amount of thermal incident energy workers could be exposed to at working distance during an electrical arc event?
a)
A Incident Energy
b)
B Shock Hazard
c)
C Arc Flash Hazard Analysis
d)
D Arc Flash Labelling
11.
What is the IEEE book use as reference in Arc Flash Calculation
a)
A IEEE 902
b)
B IEEE 1100
c)
C IEEE 1584
d)
D IEEE 551
12.
What kind of boundaries does NFPA 70E 2015 identify?
a)
A Boundaries for the use of tools and equipment
b)
B Boundaries for the use of specific PPE
c)
C Boundaries for shock and flash protection
d)
D Boundaries for safety behaviours
13.
What do arc flash calculations identify?
a)
A Shock protection boundaries
b)
B Shock protection boundaries and PPE requirements
c)
C Shock protection boundaries and flash protection boundaries
d)
D Flash protection boundaries and incident energy
14.
How many equations does the IEEE Standard 1584-2002 use to calculate incident energy?
a)
A One
b)
B Two
c)
C Three
d)
D Four
15.
What is an open arc flash?
a)
A It is an arc flash created by equipment in closed spaces.
b)
B It is an arc flash created in unconfined spaces.
c)
C It is created by an ejected arc.
d)
D It is created by a tracking arc.
16.
What is working distance?
a)
A How far away a worker is from a piece of electrical equipment.
b)
B How far away a worker is from their place of work.
c)
C How far away a worker is from a potential arc flash source inside a piece of electrical equipment.
d)
D How far away you should be to avoid getting a shock.
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