WorksheetsEBC for Operation (Electrical)
Total questions: 12
Worksheet time: 6mins
Centre contact of Edison screw lamp holder must be connected to the ______
Phase conductor
Neutral conductor
Earth conductor
Ground conductor
Single phase voltage of 240 Volt is measured between _________
Any phase and neutral line
Red and yellow phase
Yellow and blue phase
Neutral and earth line
A fuse or miniature circuit breaker will operate or break a supply to a load when
there is _____________ occur in the circuit.
Short circuit
Short circuit and overload
Earth leakage
Arc flash
The point where lighting final circuit is taken from:
Distribution board
Underground cable
Overhead lines
Service cable.
What is the rated of MCB used for room lighting circuit.
5A
16A
20A
25A
The end cover which is connected to the load side is namely as a __________
Driving end cover (DE)
Non-driving end cover (NDE)
Terminal box cover (TBC)
Frame box cover (FBC)
The motor frame is made of _________
Cast steel or cast copper
Cast copper or cast aluminum
Cast steel or cast aluminium
Cast steel or cast brass
This motor enclosure is suitable used in chemical plants or oil refinery.
Flameproof
TEFV
Drip proof
Chemical-proof
The speed for a three-phase induction motor depends on:
Supply frequency and number of stator poles
Supply frequency and rotor speed
Number of stator poles and motor type
Rotor speed and slip speed
This is an area in which an explosive gas–air mixture is continuously present or present for long periods of time.
Zone 0
Zone 1
Zone 2
Non-Hazardous area
A letter T1 (T-rating) on electrical apparatus marking is an indication for.
A maximum ambient temperature where the apparatus can be installed.
A maximum surface temperature of electrical apparatus.
Normal operating temperature of electrical apparatus
A minimum operating temperature of electrical apparatus
A letter IIB in a marking system below indicates…………Ex d IIB T3
European standards designate for Ex protection
Type of apparatus protection
Apparatus gas group
Temperature class
