Electrical Protection 3

Electrical Protection 3

Professional Development

20 Qs

quiz-placeholder

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Electrical Protection 3

Electrical Protection 3

Assessment

Quiz

Instructional Technology

Professional Development

Practice Problem

Hard

Created by

JOHN MCGINLEY

Used 23+ times

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20 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What statement best describes the construction of a fusible link

A metal encased device that detects overcurrent in heating appliances

a metal alloy element enclosed in a small metal canister with 2 leads

a fuse in metal surrounded by quartz silica sand

a porcelain type fuse used in heating appliances

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Fusible links are designed to interupt current flow when the current gets too high

True

False

Answer explanation

Fusable links interupt the current when excess temperature or heat melts the link

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

"HRC" stand for ...

High rupturing capacity

High rupturing current

High resistance capacity

High resisitance current

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The ceramic fuse barrel of a HRC fuse has good _______________ characteristics

Insulation and strength

looks and strength

mechanical strength and thermal

insulation and thermal

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The filler in HRC fuses is made of graded silica which has good ....

thermal characteristics

arc extinguishing properties

insulation properties

thermal conductivity

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

HRC fuses are used in installations where higher prospective short circuit voltages are present

True

false

Answer explanation

Used in installations where higher short circuit currents are present

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A MCB trips by what type of action during overcurrent

Solenoid coil action

thermal

magnetic

bi -metal

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