1 ) Is
it safe to attach a safety belt above the top arm on a pole ?
ANS :
No.
2 ) In
using a live line tools what must be guarded against ?
ANS :
Specific distance should be maintained from the live conductors as per voltage
classifications.
3 )
What minimum distance should be maintained from any live part by a lineman
himself for the operating voltages 6.6 kv , 33kv , 66kv, 132 kv & 220 kv ?
ANS :
6.6kv-> 0.6 M , 11kv -> 0.9M , 33kv -> 1.2 M , 66 -> 2M , 132 kv
-> 3.5 M , 220 kv -> 4.5 M
4 )
While preparing an electrolyte of a battery should we add water to acid or
water ?
ANS :
Add acid to water .
5 )
What are the precautions to be observed during charging of a battery ?
ANS :
1) Proper
ventilation should be kept.
2) A
naked flame should never be brought near the battery under charge.
6 )
What are the precautions to be taken if the working place is far away from the
controlling switch ?
ANS : After opening the controlling switch all
fuses should be taken off and a board written “ men at work “ should be fixed
on the controlling switch to avoid any unwanted operation .
7 )
What do you mean by electricians hand tools ?
ANS
: The tools often used
by an electrician for all kinds of electrical work are called electricians hand
tools .
8 )
What are the important electricians hand tools ?
ANS :
1) Insulated
combination pillars
2) Insulated
screw drivers
3) Hacksaw
4) Flat
file and round file
5) Adjustable
wrench
6) Side
cutting pillars
7) Insulated
nose pillars
8) Cross
peen or ball peen hammer
9) Finer
chisel and cold chisel
10)
Spanner set
11)
Hand drill
12)
Rows pulling tool
13)
Knife
14)
Test lamp
15)
Poker
9 )
What safety measure should be taken before replacing any blown fuse ?
ANS : Before replacing any blown fuse of a circuit
the controlling switch of that circuit placed before the fuse should be fuse
should be put off for the safety of the personnel otherwise the concerned
person may get electric shock.
10 ) Is
it possible to take out any fuse grip from a switch by opening its cover
without putting off the switch ?
ANS : No because for safety reason a mechanical
locking is provided with the cover and base frame so that the cover can not be
opened unless the switch is put off.
11 )
What precautions are to be observed at the time of switching on a current to
any portable electrical equipment ?
ANS :
At the time of switching on a current to any portable electrical equipment it
is to be assured that the equipment is correctly earthed and the insulation of
the connecting cable is sound.
12 )
What precautions are to be observed at the time of handling a portable
electrical equipment ?
ANS :
At the time of handling portable electrical equipment it is to be assured that
the equipment is disconnected from the supply , the cable cord must be checked
for its proper insulation otherwise leaking insulation may cause a serious
electric shock.
13 )
What precautions are to be observed at the time of making changes in the wiring
circuit ?
ANS : First of all supply must be cut off , then
all circuits must be marked as per distribution layout and it is to be assured
that each circuit is provided with fuse of proper rating .
14 )
What precautions are to be taken at the time of operating any electrical
machine ?
ANS :
At the time of operating any electrical machine it is to be assured that the
machine is properly earthed and connected along with the provision of proper
controlling and safety devices , the direction of ration must be cleared , lubricating oil must not be
given during running condition.
15 )
What precaution are to be observed while changing the place of a portable
electrical equipment ?
ANS :
Before changing the place of a portable electrical equipment its plug top
should be pulled out from the supply socket.
16 )
What precautions should be observed before putting a main switch to ON position
?
ANS :
It is to be ensures that no one is working on the line controlled by that main
switch.
17 )
Why are the special safety precautions to be taken for the use of electricity
in bath rooms ?
ANS :
Because there is every possibility of getting electric shock due to low body
resistance, low body contact resistance with live parts and also earth in wet
atmosphere .
18 )
What safety measure are to be taken during welding work ?
ANS :
During welding work every welder should wear goggles , safety glasses or any
other eye protection as instructed by the person in charge depending upon the
type of work handled.
19 )
What precautions are to be observed at the time of testing electrical
appliances ?
ANS :
At the time of testing it is to be assured that the electrical appliances are
disconnected from the supply line .
20 )
What would happen if there is no fuse in electrical circuit ?
ANS : In
case of any electrical short-circuit fault high current will flow through the
circuit conductor producing high temperature which will not only damage the
insulation but also result probable burning of the conductor leading towards a
big fire hazard.
21 )
How full safety for an electrician installation can be assured ?
ANS :
Full safety for an electrical installation can be assured by providing
1) Proper
installation.
2) Good
earthing and .
3) Proper
selection of fuses and protective devices in the circuit.
22 )
What are the main causes of getting electrical fire ?
ANS :
1) Loose
connection in electrical circuit .
2) Use
of undersize wire .
3) Overloading
at low ampere graded socket outlet.
4) Short
circuit or leakage fault due to the damage of cable insulation.
5) Presence
of combustible material near sparking zone of switch board and fuse board.
23 )
What precautions are needed to avoid electrical fire in the wiring installations
?
ANS : The
following precautions are to be needed :-
a) Oversize
fuse wire should not be used .
b) Poor
joints should be avoided.
c) Socket
outlets should not be overloaded.
d) Any
combustible material should not be stored near switch boards and fuse boards .
24 )
What is called a fire extinguisher ?
ANS : An apparatus used for the purpose of
fire fighting is called a fire extinguisher .
25 )
How a fire extinguisher extinguishes fire ?
ANS :
A fire extinguisher produces a gas liquid or foam which creates a covering
surrounding the fire and extinguishes the fire by obstructing the supply of
oxygen.