Wireman – Semester 2, Module 5 - Industrial Wiring Practice

JavaScript isn't enabled in your browser, so this file can't be opened. Enable and reload.

Common for Wireman Trade 1st Year

NAME *

NAME OF THE ITI *

MOBILE NUMBER *

1 : Which wiring is preferred for motor connection in industries? *

2 points

A : CTS wiring

B : TRS wiring

C : PVC conduct wiring

D : Metal conduct wiring

2 : Which factor determines the size of wire to be used for industrial motor wiring? *

2 points

A : Load current

B : Supply voltage

C : Type of motor

D : Purpose of motor

3 : How many sections of wiring are there in industrial wiring? *

2 points

A : 1

B : 2

C : 3

D : 4

4 : Which is the purpose of control wiring? *

2 points

A : To limit the load current

B : To increase the motor input voltage

C : To communicate the commands to control devices

D : To measure the load current

5 : Why power and control wiring is to be run in a separate conduit in industrial motor wiring? *

2 points

A : For easy maintenance

B : To avoid current radiation

C : For easy identification

D : To reduce the voltage drop

6 : Which place the control ON/OFF switches is to be placed a industrial motor wiring? *

2 points

A : Near the control panel

B : Near the input main

C : Near the entrance

D : Near the motor

7 : Which is the part name marked as x starter face plate arrangement? *

2 points

A : over load relay

B : No volt coil

C : Sprial spring

D : Studs

8 : Which is the name of starter? *

2 points

A : Auto star delta starter

B : Manual star delta starter

C : D.O.L starter

D : MINI manual starter

9 : Which is the name of relay marked as x? *

2 points

A : Under voltage relay

B : Electromagnetic relay

C : Over voltage relay

D : Time delay relay

10 : Why over load relay coil is wound with thick gauge of copper wire? *

2 points

A : To carry the line voltage

B : To reduce voltage drop

C : To carry load current

D : To reduce the power loss

11 : Which is the purpose of single phasing preventor in 3 phase motor circuit? *

2 points

A : To protect the motor from damage

B : To run the motor continuously at single phasing

C : To regulate the supply voltage

D : To protect the motor from over load

12 : What is the formula to calculate the value of insulation resistance while testing the wiring? *

2 points

13 : What is the formula to calculate the standard value of Insulation Resistance (Ri) as per BIS? *

2 points

14 : Which is the unit of insulation resistance? *

2 points

A : Milli ohm

B : Ohm

C : kilo ohm

D : Mega ohm

15: Which rated voltage megger is used to measure the insulation resistance value of 3 phase 415V induction motor? *

2 points

A : 250V

B : 500V

C : 1000V

D : 2500V

16 : Which instrument is used to measure the insulation resistance? *

2 points

A : Shunt type ohmmeter

B : Series type ohmmeter

C : Megger

D : Multimete

17 : What is the main reason for leakage current flowing in wiring installation? *

2 points

A : Insulation failure

B : Low earth resistance

C : Incorrect size of earth wire

D : High earth reactance

18 : How many earth continuity conductors should be provided from the machine to panel board and to the main earth electrode? *

2 points

A : 4

B : 3

C : 2

D : 1

19 : Which size of GI conductor is used for earthing to the motor from the main electrode? *

2 points

A : 14 SWG

B : 10 SWG

C : 8 SWG

D : 4 SWG

20: What is the colour code of protective earthing conductor as per NE code? *

2 points

A : Blue

B : Black

C : Green

D : Red

21: What is the recommended resistance value of earth continuity conductor used in domestic wiring installation as per IE Rules? *

2 points

A : Not more than 8 ohm

B : Not more than 3 ohm

C : Not more than 2 ohm

D : Not more than 1 ohm

22 : How many earth is to be provided for a AC 3 phase induction motor? *

2 points

A : 1

B : 2

C : 3

D : 4

23: How to reduce the earth resistance value keep as low? *

2 points

A : By connecting two earth in series

B : By adding more charcole

C : By connecting to earth in parallel

D : By adding more salt

24 : What is the minimum clearance required between the wall and backside of a panel board in industrial wiring? *

2 points

A : Not less than 22.88 cm

B : Not less than 18.4 cm

C : Not less than 15.8 cm

D : Not less than 10.2 cm

25 : What is the minimum distance in front of the switch board for industrial pannel board wiring? *

2 points

A : 2 M

B : 1-5 M

C : 1 M

D : 0.5 M

26 : What is name of part marked as x? *

2 points

A : Cable entry hole

B : Bus - bars

C : Enclosure

D : Porcelain supports

27: What is the thickness of steel sheet using the covers of bus bar chamber? *

2 points

A : 1 mm

B : 1.5 mm

C : 2 mm

D : 2.5 mm

28 : Why the equipment are arranged in front side of the switch board in industrial wiring? *

2 points

A : To avoid short circuit

B : To operate easily

C : To test the supply frequently

D : To avoid personnal contacts during maintenance

29 : What is the purpose of openings provided in bus bar chamber? *

2 points

A : For cable entries

B : For air circulation

C : To release the heat

D : To extend the busbar

30: Which material is used to make bus bars? *

2 points

A : Brass

B : Galvanised iron

C : Aluminium

D : Bronze

31 : What is the colour code of 3 phase 4 wire AC supply system? *

2 points

A : Red, yellow, black, green

B : Red, blue, black, yellow

C : Red, black, green, blue

D : Red, yellow, blue, black

32 : What is the colour code of single phase AC supply as per NE code? *

2 points

A : Red and blue

B : Red and black

C : Red and green

D : Red and yellow

33. What is the alpha numeric notation of 3 phase apparatus connection? *

2 points

A : L1, L2, L3 & N

B : U, V, W & N

C : R, Y, B & N

D : A1,B1, C1 & N

34: Which material is used for harnessing of cable? *

2 points

A : Metal bands

B : P.V.C sleeves

C : Link clips

D : P.V.C saddles

35: How the cable size is determined for industrial wiring? *

2 points

A : By considering the voltage of circuit

B : By considering the load resistance

C : By considering the current carrying capacity

D : By considering the power factor

Submit

Clear form

Never submit passwords through Google Forms.

This content is neither created nor endorsed by Google. Report Abuse - Terms of Service - Privacy Policy

Forms