Wireman – Semester 4, Module 5

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Wireman – Semester 4, Module 5 - UG CABLE

Common for Wireman Trade 2nd Year

NAME *

NAME OF THE ITI *

MOBILE NUMBER *

1 : Which is the outer layer of an underground cable? *

2 points

A : Armour

B : Lead sheath

C : Serving

D : Bedding

2 : Which material is used for metallic sheathing in underground cable? *

2 points

A : Copper

B : Aluminium

C : Nichrome

D : Lead

3 : Which material is used for armouring of underground cable? *

2 points

A : Galvanised steel

B : Copper

C : Cast iron

D : CRGO steel

4 : Which conductor material is used for under ground cable? *

2 points

A : ACSR

B : Aluminium

C : Steel

D : Nichrome

5: What is the function of armouring in under ground cable? *

2 points

A : To avoid mechanical injury to cable

B : To prevent entry of moisture

C : To protect the metallic sheath

D : To provide flexibility to cable

6 : Why stranded conductors are used in underground cable? *

2 points

A : To provide flexibility

B : To reduce conductivity

C : To provide mechanical strength

D : To reduce the weight

7 : Which is the property of insulating materials used in under ground cable? *

2 points

A : Hygroscopic

B : High insulation resistance

C : Low mechanical strength

D : High conductivity

8 : Which type of insulation is also known as empire type? *

2 points

A : Impregnated paper

B : Varnished cambric

C : Polyvinyl Chloride

D : Rubber

9 : What is the drawback of rubber insulation used in under ground cable ? *

2 points

A : Absorbs moisture

B : Hard

C : Low mechanical strength

D : High hygroscopic

10 : What is the advantage of Vulcanised Indian Rubber ? *

2 points

A : Safe temperature is high

B : Hygroscopic

C : Greater mechanical strength

D : High conductivity

11 : What is the voltage rating of Super tension cables ? *

2 points

A : up to 1100 V

B : up to 11000 V

C : 22 kV to 33 kV

D : beyond 132 kV

12 : What is the voltage rating of Extra super voltage cables ? *

2 points

A : beyond 132 kV

B : up to 11000 V

C : 22 kV to 33 kV

D : up to 1100 V

13 : Which is the classification of underground cable according to their insulation system? *

2 points

A : Single core cable

B : XLPE cable

C : Low tension cable

D : Super tension cable

14: What is the full form of MI cables ? *

2 points

A : Metal Insulated cables

B : Mineral Insulated cables

C : Mineral Inserted cables

D : Metal Inserted cables

15 : How many cores are in a three and half core under ground cable ? *

2 points

A : Three

B : Four

C : Two

D : Five

16 : Which type of cable is used if the operating voltage is greater than 66 KV ? *

2 points

A : Belted cables

B : Screened cables

C : H type cable

D : Pressure cables

17 : Which are the types of pressure cables ? *

2 points

A : Oil filled and gas pressure cables

B : Belted cables and screened cables

C : H type and SL type cables

D : H type and belted cables

18 : Which method of laying involves digging a trench in the ground and laying cable on a bedding of sand ? *

2 points

A : Laying in ducts

B : Laying direct in ground

C : Laying on racks

D : Solid system of laying

19 : Which method of cable laying is used inside buildings and industrial plants? *

2 points

A : Direct laying in ground

B : Laying in ducts

C : Laying on racks in air

D : solid system of laying

20 : What is the name of the cable laying method? *

1 point

A : Laying into ducts

B : Laying direct in ground

C : Laying along building

D : Laying on racks in air

21 : What is the advantage of direct laying of underground cable ? *

2 points

A : Simple and less costly

B : Easy extension of load

C : Alteration is easy

D : Easy fault location

22: Which method of cable laying, The cable in protected by sand (or) layer of bricks? *

2 points

A : Laying cables along building

B : Laying cables direct in grounds

C : Laying cables into ducts

D : Laying cables on racks in air

23 : What is the full form of PILC? of *

2 points

A : Paper impregrated lead sheathed cable

B : Paper insulated lead sheathed cables

C : Paper input lead sheathed cable

D : Polyvinyl impregrated lead sheathed cable

24 : What is the name of the U.G. cable joint? *

1 point

A : Tee joint

B : Straight through sleeve joint

C : Epoxy straight joint

D : Tri-furcating end connection

25: What is maximum voltage grade of U.G.cable straight sleeve joints can be made? *

2 points

A : Up to 1.1 KV

B : Up to 3.3 KV

C : Up to 11.0 KV

D : Above 11 KV

26: What is the use of Tri- furcating end connections? *

2 points

A : To connect UG cables to AB switches etc.

B : To make straight through joints of UG cable

C : To make Tee joint of UG cable

D : To test the UG cable

27 : Which is the property of bituminous compound used for hot pouring cable joint? *

2 points

A : Low electrical strength

B : High electrical strength

C : High resistance to moisture

D : Low viscosity

28 : Which is the common fault likely to occur in under ground cable? *

2 points

A : Open circuit fault

B : Ground fault

C : Short circuit

D : Leakage fault

29: Which test is used for locating ground and short circuit fault in UG cable? *

2 points

A : Open circuit test

B : Short circuit test

C : Loop test

D : Ground test

30 : Which type of cable fault will occur, If the insulation between two conductors is faulty? *

2 points

A : Ground fault

B : Open circuit fault

C : Short circuit fault

D : Leakage current fault

31 : Which cable fault is caused due to the flow of current from the core to the lead sheath? *

2 points

A : Ground fault

B : Short circuit fault

C : Leakage current fault

D : Open circuit fault

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