Wireman – Semester 2, Module 6

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Wireman – Semester 2, Module 6 - Commercial wiring

Common for Wireman Trade 1st Year

NAME *

NAME OF THE ITI *

MOBILE NUMBER *

1: What is the minimum bus bar clearance between phases in medium voltage application? *

2 points

A : 25 mm

B : 32 mm

C : 36 mm

D : 40 mm

2 : What is the maximum permissible voltage drop at the point of the commencemert of supply at the consumers end for high and extra high voltage as per IE rule? *

3 points

A : 12.5%

B : 8%

C : 5%

D : 3%

3 : How the cable is to be connected with the distribution boards as per IE rule? *

2 points

A : By crimping lugs without cutting any cable strands

B : By crimping lugs with some strands cut off

C : By directly inserting the strands into terminals

D : By twisting the strands and inserting into

4 : Which is used to protect the conductors that passing through walls in commercial wiring as per IE rules? *

3 points

A : Wood batten

B : Rigid metal conduit

C : Flexible metal conduit

D : Flexible non metal conduit

5 : What is the full form of LAN? *

2 points

A : Load Area Network

B : Local Area Network

C : Local Aviation Network

D : Local Active Network

6 : Which is the inter processor distance of LAN? *

2 points

A : Above 1000 km

B : 10 km to 1000 km

C : 1 km to 10 km

D : 0 to 1 km

7 : Which is the data transmission medium in LAN? *

2 points

A : PVC cable

B : Armoured cable

C : Belted cable

D : Coaxial cable

8: What is the characteristics of LAN? *

2 points

A : Consist one computer only

B : Group of 2 or more computers in the same building

C : Group of computers in different building

D : Group of computers in different area

9 : What is electrical drive? *

2 points

A : Electro mechanical device

B : Electrical device

C : Electronic device

D : Mechanical device

10 : Which is the application of electrical drives? *

2 points

A : Agricultural pumps

B : Fabricating workshop

C : Water treatment plant

D : Electric traction

11 : Which is the advantage of AC drive? *

2 points

A : Power and control circuit are simple

B : Speed and design ratios have upper limits

C : Produce a simulated wave form

D : Heavy windings required

12 : Which colour LED indicates the fault occurred in drives? *

2 points

A : Green

B : Yellow

C : Red

D : Blue

13 : What is the expansion of UPS? *

2 points

A : Uninterrupted Power System

B : Uninterrupted Power Supply

C : Uninterrupted Power Solution

D : Uninterrupted Power Section

14 : Which circuit diagram is illustrated? *

2 points

A : ON line UPS

B : OFF line UPS

C : Bridge rectifier

D : Metal rectifier

15 : Which part is marked as in the block diagram of OFF line UPS? *

2 points

A : Reset switch

B : Change over switch

C : Control panel

D : Battery charger

16 : What is the relation between back up time and capacity of the battery of an UPS? *

2 points

A : Capacity of battery increases back up time increases

B : Capacity of battery increases back up time decreases

C : Capacity of battery decreases back up time increases

D : Capacity of battery has no relations with back up time

17 : Which component is connected across the transformer winding of an UPS for protection from lightning? *

3 points

A : Diode

B : Transistor

C : Triode

D : Polyster capacitor

18 : Which electrical / electronic device requires ups? *

2 points

A : Air conditioner

B : Micro wave oven

C : Computer

D : Television

19 : Why the battery is to be placed nearer to ups in ups wiring? *

2 points

A : To minimise the length of cable

B : For safety reasons

C : To increase the life of battery

D : To reduce voltage drop

20 : What adjustment is to be done in commercial installation for interconnection of two or more UPS? *

3 points

A : By connecting manually

B : By using a change over relay

C : By using rotary switch

D : By using ICDP switch

21 : How the capacity of an inverter is expressed? *

2 points

A : Watt hour

B : Ampere

C : Volt ampere

D : Ampere hour

22 : Which wire is used to connect inverter and battery? *

2 points

A : PVC 1.5 sqmm copper wire

B : Special auto wire

C : PVC 1.5 sqmm aluminium wire

D : PVC 2.5 sqmm copper wire

23 : How the neutral is provided in an inverter? *

2 points

A : It is common for inverter output and AC mains

B : Separate neutral wire is provided

C : Neutral is provided for out put only

D : Neutral is provided for AC mains only

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