Why circuit breaker is better than fuses?
a) it is cheap
b) its installation is easy
c) it works faster
d) none of these
To avoid the risk of electric shocks, which of the following is/are done?
a) insulating
b) earthing
c) resisting
d) both a and c
Explanation:Earthing (also known as grounding) refers to contact with the Earth's surface electrons by walking barefoot outside or sitting, working, or sleeping indoors connected to conductive systems, some of them patented, that transfer the energy from the ground into the body.
Potential Hazards In Using Electricity:
Electrical hazards come in a variety of forms, but all have the potential
to cause serious injury. Common types of electrical hazard include:
Contact with live wires resulting in electric shock and burns,Fires due to
faulty wiring,Exposed electrical parts,Ignition of fires or explosions due to
electrical contact with potentially flammable or explosive materials,Inadequate
wiring,Improper grounding, sometimes caused by workers deliberately removing
the ground pin on an electric plug to fit a two-prong extension
cord,Interaction with overhead power lines,Damaged wire insulation, causing
electrical conductors to make contact with each other, tools, or a worker’s
body,Overloaded circuits,Wet conditions.
Electric shock occurs if current flows from an electric circuit through a person’s body to……
a) earth
b) moon
c) insulator
d) water
Which of the following is/are considered in determining the strength of an electric shock?
a) size of current
b) voltage
c) duration of current flow
d) both a and c
Which of the following is/are NOT considered in determining the strength of an electric shock?
a) size of current
b) voltage
c) duration of current flow
d) all of these
