Wireman – Semester 4, Module 7 - Control panel wiring and maintenance

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Common for Wireman Trade 2nd Year

NAME *

NAME OF THE ITI *

MOBILE NUMBER *

1 : Which colour is to be powder coated(painted) on a control panel as per IE rule? *

2 points

A : Light blue

B : Siemens Gray

C : Yellow

D : Dark blue

2 : Which electrical items are to be fitted in a control panel? *

2 points

A : Switches and indicators only

B : Bus bar only

C : Safety equipments ony

D : Switching, control, safety and measuring devices

3: Which duty cycle of contactor used for the application of Crane,Lift,and hoist in AC? *

2 points

A : AC 2

B : AC 4

C : DC 1

D : DC 2

4 : Which factor is to be considered while designing the control panel dimensions? *

2 points

A : Height of panel

B : Width of panel

C : Length of panel

D : Swing area of cabinet doors

5: Which is the amount of additional load to be considered before selecting the protective accessories for a motor in control panel? *

2 points

A : 25%

B : 50%

C : 75%

D : 100%

6: What is the name of switch? *

2 points

A : Change over switch

B : Pole changing switch

C : Ammeter selector switch

D : Voltmeter selector switch

7: What type of switch unsuitable for portable (or) mobile devices? *

2 points

A : Push button switch

B : Pole changing switch

C : Mercury switch

D : Limit switch

8: which is used with ammeter to measure high current in panel board? *

2 points

A : Current Transformer

B : Control Transformer

C : Potential Transformer

D : Power Transformer

9: Which switch is used to control the distance or angles of movement of any machine part or axis or object? *

2 points

A : Mercury switch

B : Limit switch

C : Push button switch

D : Selector switch

10: What is the name of accessory used in control panel? *

2 points

A : Indication Lamp

B : Timer

C : Rectifier

D : Push button switch

11 : Which accessory is used in control panel to mount MCB, Contactor etc.without using screw? *

3 points

A : Race way

B : DIN rail

C : Gromet

D : PVC channel

12 : What is the use of wire ferrule in control panel wiring? *

2 points

A : Harnessing the cable

B : Insulating the cable

C : Easy identification of cable end

D : To protect the wire from heat

13 : What is the name of part marked as X in nylone cable tie? *

2 points

A : Button

B : Head

C : Thimble

D : Pawl

14 : Which accessory is used to insulate and hold the cables, if they pass through punched or drilled hole in control panel? *

3 points

A : Grommet

B : PVC channel

C : Wire clips

D : Wire sleeves

15 : Which is the minimum spacing between components and raceways in panel board if system voltage is 415V? *

3 points

A : 50 mm

B : 100mm

C : 60 mm

D : 75 mm

16: Which colour of earth wire is used in control panel to earth door and cabinet? *

3 points

A : Red

B : Yellow

C : Blue

D : Green yellow

17 : Which test is to be done regularly in panel board with priority? *

2 points

A : Main power contacts condition

B : Insulation resistance and earth continuity

C : MCB connection

D : Filter and cooling fan

18: Which is the advantage of periodical maintenance of control panel? *

2 points

A : Reduces power cost

B : Assured over loading

C : Ensure safety to the machine and operators

D : Helps continuos operation

19 : Which type of fault will occur if the insulation of cable is damaged? *

2 points

A : Earth fault

B : Open circuit

C : Short circuit

D : High value series resistance fault

20 : Which is the purpose of third terminal in insulation tester? *

2 points

A : To measure more quantity

B : To extend the range

C : To use as a earth tester

D : To get accurate reading

21 : What is the name of instrument used to find out open circuit fault in control panel? *

3 points

A : Earth tester

B : Ohm meter

C : Megger

D : Wheatstone bridge

22 : Why it is recommended to run power and control circuit cables seperatly in control panel? *

3 points

A : For easy Identification

B : To Avoid transfer of heat from power cable to control cable

C : To avoid leakage

D : To avoid short circuit

23 : What is the name of fault if line is break in power cable? *

2 points

A : Open circuit

B : Short circuit

C : Earth fault

D : Earth leakage

24 : Which is the minimum value of insulation resistance between phase to earth terminal in electrical installation? *

2 points

A : 10 MΩ

B : 100 MΩ

C : 10 kΩ

D : 1 MΩ

25 : Which type of fault light will glow dim and motor runs slowly in a electrical installation *

2 points

A : Open circuit

B : Earth leakage

C : High value series resistance fault

D : Short circuit

26 : What is the function of Residual Current Circuit Breaker in electrical Installation? *

2 points

A : Protect from short circuit

B : Protect from over current

C : Protect from open circuit

D : Protect from earth leakage

27 : Which helps the maintenance electrician to trouble shoot a fault in control panel in absence of operation manual? *

2 points

A : Trouble shooting flow chart

B : Maintenance schedule

C : Machine register

D : Machine maintenance card

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