Power Electronics - Manoj Dole - E-Book

Power Electronics E-Book

Manoj Dole

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Power Electronics is a simple e-Book for Power Electronics Diploma & Engineering Course, Revised Syllabus in 2020, It contains objective questions with underlined & bold correct answers MCQ covering all topics including all about the latest & Important about Engineering Chemistry, Basics of Electrical Engineering, Computer Programming and Utilization, Engineering Physics, Basics of Electronic Engineering, Digital Electronics, DC Machines and Transformers, Electrical Power: Generation and Transmission, Advanced Electronic Devices and Circuits, Elements of Power Electronics, Linear Electronic Circuits, DC Motor Drives DC Power Electronic Converters, AC Rotating Machines, Electrical Network and Circuits, Measuring Instruments and Transducers, AC Motor Drives, Applied Power Electronics.

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PowerElectronics

BY

ManojDole

ISBN

978-93-5438-422-6

©

Manoj

Dole

2020

Published

in

India

2020

by

Pencil

A

brand

of

One

Point

Six

Technologies

Pvt.

Ltd.

123,

Building

J2,

Shram

Seva

Premises,

Wadala

Truck

Terminal,

Wadala

(E)

Mumbai

400037,

Maharashtra,

INDIA

E

[email protected]

W

www.thepencilapp.com

All

rights

reserved

worldwide

No

part

of

this

publication

may

be

reproduced,

stored

in

or

introduced

into

a

retrieval

system,

or

transmitted,

in

any

form,

or

by

any

means

(electronic,

mechanical,

photocopying,

recording

or

otherwise),

without

the

prior

written

permission

of

the

Publisher.

Any

person

who

commits

an

unauthorized

act

in

relation

to

this

publication

can

be

liable

to

criminal

prosecution

and

civil

claims

for

damages.

DISCLAIMER:TheopinionsexpressedinthisbookarethoseoftheauthorsanddonotpurporttoreflecttheviewsofthePublisher.

Authorbiography

MANOJ

DOLE

is

an

Engineer

from

reputed

University.

He

is

currently

working

with

Government

Industrial

Training-

Institute

as

a

lecturer

from

last

12

Years.

His

interest

include-

Engineering

Training

Material,

Invention

&

Engineering

Practical-

Knowledge

etc.

TableofContents

Contents

PowerElectronicsMCQ

PowerElectronicsMCQ

PowerElectronicsDiploma&EngineeringMCQAbouttheBookPowerElectronicsisasimplee-BookforPowerElectronicsDiploma&EngineeringCourse,RevisedSyllabusin2020,Itcontainsobjectivequestionswithunderlined&boldcorrectanswersMCQcoveringalltopicsincludingallaboutthelatest&ImportantaboutEngineeringChemistry,BasicsofElectricalEngineering,ComputerProgrammingandUtilization,EngineeringPhysics,BasicsofElectronicEngineering,DigitalElectronics,DCMachinesandTransformers,ElectricalPower:GenerationandTransmission,AdvancedElectronicDevicesandCircuits,ElementsofPowerElectronics,LinearElectronicCircuits,DCMotorDrivesDCPowerElectronicConverters,ACRotatingMachines,ElectricalNetworkandCircuits,MeasuringInstrumentsandTransducers,ACMotorDrives,AppliedPowerElectronics,ACPowerElectronicConverters,MicrocontrollerforPowerElectronics,ControlSystemforPowerElectronics,ProgrammableLogicControllers,PowerElectronicsforRenewableEnergyandlotsmore.Weaddnewquestionanswerswitheachnewversion.Pleaseemailusincaseofanyerrors/omissions.Thisisarguablythelargestandbeste-BookforAllengineeringmultiplechoicequestionsandanswers. Asastudentyoucanuseitforyourexamprep.Thise-Bookisalsousefulforprofessorstorefreshmaterial.

Safety

Precaution

in

Power

Electronics

Engineering

01]

In

case

of

bleeding,

take

treatment

Of

A]

spray

cold

water

B]

Bandage

immediately

-----]

C]

Enquire

about

the

accident

thought

treatment

D]

cold

3"

and

rest

02]

in

case

of

an

accident,

the

victim

should

im

A]

Asked

to

take

rest

C]

Attended

immediately

D]

leave

him

03]

First

aid

is

given

to

an

injured

or

ill

person

primarily....

A]

Save

life

B]

Prevent

further

deterioration

of

the

muff’s

C]

Give

best

possible

comfort

D]

All

of

these

04]

Colour

code

for

Bins

for

waste

paper

segregation

is

-----

A]

blue

Colour

B]

Yellow

Colour

C]

Red

Colour

D]

Green

Colour

05]

In

Japanese

Seiko

stands

for

--------------

A]

Shine

B]

Sort

C]

Standardize

D]

Sustain

06]

Benefit

of

SS

system

is

------

A]

Increase

in

productivity

B]

Increase

in

quality

C]

Reduction

in

wastage

of

time

D]

All

of

these

07]

Safety

is

-----------

A]

nobody’s

business

B]

every

bodise

business

C]

Some

bodies

business

D]

The

organization

business

08]

For

basic

categories

of

safety

signs

are

available

The

meaning

of”prohibition”

sign

----

A]

shows

it

must

not

be

done

B]

Shows

what

must

be

done

C]

Warns

the

hazard

or

danger

D]

Gives

information

of

safety

provision

09]

Which

one

is

a

workshop

safety?

A]

Keep

shop

floor

clean

and

free

from

grease,

oil

or

other

slippery

materials

B]

Stop

the

machine

before

changing

the

speed

C]

Don’t

use

cracked

or

chipped

tools

D]

Don't

try

to

stop

a

running

machine

with

hand

10]

In

Personal

Protect

Equipment

(PPE]

HELMET

is

used

to

A]

protect

head

B]

Protect

eyes

C]

Protect

hands

 D]

Protect

ears

11]

Which

of

the

following

belongs

to

general

safety?

A

Have

a

worker

in

good

attitude

 B]

The

work 

clean

and

clear

C]

Concentrate

on

your

work

D]

Keep

the

floor

and

gangways

clean

and

clear

12]

While

grinding,

which

is

used

to

protect

the

eyes?

A]

Dark

green

glass

B]

Mask

C]

Sun

glasses

D]

Safety

goggles

13]

Which

of

the

following

is

done

for

machine

safety?

A]

Check

the

oil

level

before

starting

the

machine

B]

Do

things

in

a

methodical

way

C]

Keep

the

floor

and

gangways

clean

and

clear

D]

Don’t

use

dies

and

scarves

14]

ln

Personal

Protect

Equipment

(PPE],

'sleeves’

is

used

to

protect

----------

A]

Face

B]

Eyes

C]

Ears

D]

Hands

15]

ABC

stands

for

--------------

A]

Automatic

Breathing

Control

B]

Automatic

Blood

Control

C]

Airway

Breathing

Circulation

D]

Automatic

Blood

Circulation

16]

To

put

off”Class

B”

fire,

the

types

of

fire

extinguisher

used

is

...........]

A]

dry

power

B]

Carbon

dioxide

C]

Jet

of

water

D]

Foam

type

17]

Which

type

of

fire

extinguisher

is

used

to

put

off

general

fire?

A]

Water

type

Extinguisher

B]

Foam

type

Extinguisher

C]

Dry

chemical

powder

Extinguisher

 D]

Carbon

dioxide

(C02]

Extinguisher

Hand

Tools

in

Power

Electronics

Engineering

18]

One

micrometer

(U]

is

equal

to...

A]

0.1mm

B]

0.01mm

C]

0.001mm

D]

0.0001mm

19] 

Name

the

tool

used

to

make

and

finish

the

leak

proof

joints

of

a

pipe

T

joint

A]

groover

B]

setting

hammer  

C]

creasing

hammer  

D]

round

bottom

stake

20] 

Portion

of

the

hammer

used

for

fixing

the

handle

is...

A]

Face

B]

Peen

C]

Cheek

D]

Eye

hole

21] 

Weight

of

the

hammer

for

the

marking

purpose

is...

A]

250g

B]

500g

C]

1

kg

D]

2

kgs

22] 

To

cut

out

small

apertures

which

punch

and

die

type

of

machine

is

used?

A]

shear

type

nibbler 

B]

punch

type

nibbler

C]

circular

cutting

machine 

D]

guillotine

shearing

machine

23]

Scribers

are

made

of...

A]

Mild

steel

B]

High

carbon

steel

C]

Brass

D]

Cast

iron

24]

The

size

of

an

engineer’s

vice

is

specified

by

the...

A]

Length

of

the

movable

jaw

B]

Width

of

the

jaws

C]

Height

of

the

vice

D]

Maximum

opening

of

the

jaws

Bench

Vice

25]

The

form

of

thread

used

in

carpenters

vice

is...

A]

Square

B]

Acme

thread

C]

Sawtooth

Thread

D]

Knuckle

thread

26]

The

convexity

of

files

helps...

A]

To

file

concave

surfaces

B]

To

file

convex

surfaces

C]

To

prevent

rounding

of

edges

of

work

D]

The

file

to

become

straight

when

pressure

is

applied

27]]

Name

the

instrument

used

to

check

the

perpendicularity

of

the

branch

pipe

with

the

main

pipe

of

a

pipe

T

joint

A]

protractor  

B]

try

square

C]

spirit

level  

D]

straight

edge

28]

The

caliper

meant

for

measuring

the

width

of

a

slot

is...

A]

Odd

leg

caliper

B]

Outside

caliper

C]

Jenny

caliper

D]

Inside

calliper

29]

The

included

angle

of

the

groove

of

‘V’

block

is

always....

A]

45◦

B]

60◦

C]

90◦

D]

120◦

‘V’

blocks

30]

‘V’

blocks

are

available

in

grades

of...

A]

A

&

B

B]

A,B

&

C

C]

1,2

&

3

D]

1

&

2

31]

‘V’

blocks

of

grade

‘B’

are

made

of

A]

Cast

iron

B]

Mild

steel

C]

Steel

D]

Cast

steel

32]

’V’

block

50/5-40

A

is

used

for

holding

jobs

of

diameter

A]

Ø

50

mm

B]

Ø

5

to

Ø

50

mm

C]

Ø

5

to

Ø

40

mm

D]

Ø

40

mm

33]

The

reason

for

using

cast

iron

in

making

‘V’

blocks

A]

to

increase

the

weight

of

the

block

B]

to

reduce

the

cost

C]

to

reduce

the

friction

D]

to

get

a

good

appearance

34]

For

cutting

thin

tubing,

the

most

suitable

pitch

of

the

hacksaw

blade

is...

A]

1.8mm

B]

1.4mm

C]

1mm

D]

0.8mm

35]

For

cutting

solid

brass,

the

most

suitable

pitch

of

the

hacksaw

blade

is...

A]

1.8mm

B]

1.4mm

C]

1mm

D]

0.8mm

36]

A

new

hacksaw

blade

after

a

few

strokes

becomes

loose

because

of

the...

A]

Stretching

of

the

blade

B]

Wing-nut

threads

being

worn

out

C]

Wrong

pitch

of

the

blade

D]

Improper

selection

of

the

set

of

saws.

37]

While

cutting

small

diameter

pipes,

it

is

advisable

to

watch

regularly

and

ensure

that...

A]

The

cut

is

along

the

curved

line

B]

More

saw

teeth

are

in

contract

C]

The

work

is

not

overheated

D]

Proper

balancing

of

hacksaw

is

maintained

Drilling

in

Power

Electronics

Engineering

38]

If

the

drill

runs

untrue,

it

will

A]

get

too

hot

B]

cut

undersize

C]

distort

the

spindle

D]

cut

an

oversized

hole

39]

Running

the

drill

too

fast

many

result

in

A]

spoiling

the

cutting

edge

B]

poor

surface

finish

C]

twisting

the

tang

D]

drilling

an

oval

hole

40]

A

drill

with

worn

land

will

A]