WorksheetsProtection Method Part 2
Total questions: 20
Worksheet time: 11mins
To prevent accidents and injuries in the workshop you must understand and follow
safety rules
TRUE
FALSE
Electric Shock occurs when a person becomes part of the.....?
Live circuit
Dead circuit
Incedent
Neutral ciruit
The earthing conductor OR Circuit Protective Conductor (CPC) have to be secure
To ensure operation of circuit protection device.
TRUE
FALSE
Which Device in below is the Indicator of earth leakage.
RCD
MCB
CT
RCM
An RCBO provide protection against earth Fault and over current
TRUE
FALSE
For a 20A, Type C Miniature circuit Breaker the Iz value equal to ......
Note: in this question. You have to know how to calculate the Iz value to get correct answer
100A
200A
250A
150A
RCD is classed as a basic protection method.
TRUE
FALSE
The Zs for 10mA RCD is 50 ohms.
Note: in this question. You have to know how to calculate the Zs value to get correct answer.
TRUE
FALSE
S- Type RCD also known as ...?
Advance type RCD
Expensive type RCD
Portable type RCD
Delay type RCD
Green/Yellow wire (Earthing wire) is always considered as a....?
part of the live circuit.
Not part of live circuit.
part of neutral line.
part of lightning circuit.
Direct contact with power point need to use RCD with earth fault current rate of .......?
10mA
100mA
300mA
30mA
MCB Tripping characteristics set during ....?
manufacture process.
Shipping process.
using on site process.
storing process
The fuses and MCBs are connected to.....?
Neutral wire
Live wire
Earth wire
Ground wire
British Standard (BS 1361, BS 1362 and BS 88) related to:
MCB
Fuse
RCD
Earthing
The fuse wire is enclosed in a transparent glass tube or bulb, and the whole unit is sealed off called?
Atmosfer fuse
Rewirable fuse
cartridge fuse
None of all mentioned
Is the circuit breaker a usable device?
yes
No
The RCD is not classed as abasic protection class
TRUE
FALSE
The British standard 3036 is related to ....?
Cartridge fuse
Rewirable fuse
Non- rewirable fuse
The fuses are ....?
Reusable units.
None protection units
Controlling units
Sacrificial units
The setting of the motor overload unit done according to ...?
Motor FLC
Motor FLV
Motor torque
Motor frequency
