Wireman – Semester 2, Module 7 - Commercial wiring II

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Common for Wireman Trade 1st Year Part-1

NAME *

NAME OF THE ITI *

MOBILE NUMBER *

1 : How many colour coded wires the RJ-45cable contains? *

2 points

A : 4

B : 6

C : 8

D : 10

2: What is the name of the part marked as x? *

2 points

A : Jacket

B : Foil

C : Dielectric

D : Braid

3: What are the two colours used in 2 pairsof Ethernet RJ 45 cable? *

2 points

A : Blue and orange

B : Blue and brown

C : Orange and green

D : Brown and orange

4: What does the name coaxial refer? *

2 points

A : Common axis of two conductors

B : Common array of all conductor

C : Common conductor axis

D : Common axial of one conductor

5 : What is the use of co - axial cable? *

2 points

A : For transmitting electricity

B : For power wiring

C : For transmitting video signals

D : For house wiring

6 : Which computer networking component connect multiple ethernet segments together? *

2 points

A : Router

B : Switch

C : Bridge

D : Hub

7 : What is the reason for using annealed copper conductor for telephone cable? *

2 points

A : For good physical appearance

B : For high dielectric strength

C : To get more flexibility

D : To avoid corrosion

8 : What is the full form of DTH system? *

2 points

A : Direction to home

B : Divert to home

C : Direct to home

D : Distance to house

9 : What is the size of speaker wire if the distance between speaker and amplifier is less than 50 feet? *

2 points

A : 10 swg

B : 12 swg

C : 16 swg

D : 18 swg

10: What is the full form of UTP copper wiring? *

2 points

A : Uniform sheated Turns Package

B : Unshielded Twisted Pair

C : Unshielded Turns Pair

D : Universal stranded Twisted Package

11 : What are the three main factors to be considered for DTH wiring? *

2 points

A : Safety, planning, budgeting

B : Collection of material, wiring, testing

C : Marking layout, fixing of accessories, wiring

D : Measuring, marking layout, wiring

12: Which cable is used for DTH terminationto TV? *

2 points

A : RJ 45 cable

B : Lead sheathed cable

C : CTS cable

D : Weather Proof cable

13 : Why correct thickness of wire must be selected for DTH/home theater connection? *

2 points

A : To minimize the voltage drop in wiring circuit

B : To obtain good speaker performance

C : To increase the electrical conductive of the wire

D : To avoid loose connections on the terminal of the components

14 : What is the reason, the cables of Home theatre must be run away from the power supplies? *

2 points

A : To get more clarity video

B : To avoid interference with audio and video of musical item

C : To avoid short circuit between power conductor wiring

D : To protect the components from impact of audio

15: Which factor is noticed as an impact on home theatre wiring? *

2 points

A : Speaker performance

B : Video component performance

C : Space of the room installation

D : Interference issues of wiring

16: What is the name of part marked as *

2 points

A : Energy meter

B : I C cut out

C : Main Switch

D : Distribution board

17: What percentage limit of error is permitted to the energy meter used for service meter board? *

2 points

A : 1%

B : 2%

C : 3%

D : 5%

18 : Which location, the IC cut out is to be connected in service meter board? *

2 points

A : Between main switch and distribution board

B : Between energy meter and main switch

C : First position of the service meter band

D : Last position of the service board connection

19 : What is the minimum height of energy meter fixing as per NE code of practise and IE rules? *

2 points

A : 1 metre

B : 1.5 metre

C : 1.75 metre

D : 2 metre

Required

20 : Which tool is used to make holes for fixing meter board in walls during wiring? *

2 points

A : Pipe jumper

B : Rawl jumper

C : Cold chisel

D : Crow bar

21 : What is the use of Rawl jumper while fixing energy meter board on wall? *

2 points

A : To make pilot hole on the wooden gutties

B : To make holes on the bricks

C : To mark the hole points on the wall

D : To make grooves on the concrete

22: Where the wooden gutties are used in wiring? *

2 points

A : Wooden board

B : Metal board

C : Rigid walls

D : Non-rigid walls

23: Which is to be considered to select the size of ECC for earthing to service meter? *

2 points

A : Supply voltage from supplier side

B : Type of wiring installation done in the system

C : Current carrying capacity of installation

D : Type of wiring material used

24 : Which material is used to prepare heating element? *

2 points

A : Copper

B : Aluminium

C : Nichrome

D : Silver

25 : What is the formula to calculate the thermal efficiency? *

2 points

26: What is the formula for heat generated? *

2 points

27: Which material, the heater plate is made of? *

2 points

A : Porcelain

B : Ceramic

C : Ebonite

D : Bakelite

28 : Where the heating element is placed in an immersion type heater? *

2 points

A : Near the outer seating

B : Inside a hollow tube

C : Out side the body

D : Below the body

29 : Why the grooves are designed with projection in heater plate? *

2 points

A : For the uniform distribution of heat

B : To prevent the heating element from coming out of grooves

C : To reduce the space for coiled heating element

D : To increase the resistance of the heating

30 : Which metal is used to make contact points of thermostat? *

2 points

A : Copper

B : Silver

C : Aluminium

D : Brass

31: What is the property of heating element used in electrical heating appliances? *

2 points

A : Low co efficient of expansion

B : Low specific resistance

C : Low mechanical strength

D : Low voltage withstanding

32: What is the name of diagram? *

2 points

A : Wiring diagram

B : Installation diagram

C : Layout diagram

D : Circuit diagram

33: Which is the permissible voltage drop in declared voltage supply to HT consumer as per IErule? *

2 points

A : Not more than 5%

B : Not more than 8%

C : Not more than 10%

D : Not more than 12%

34: Which formula is used to calculate the permissible voltage drop in 3 phase wiring circuits(I=line current R= Resistance of one core only) *

2 points

35: Which wiring system is suitable for high rise buildings? *

2 points

A : Looping out from switches

B : Distribution system

C : Ring main system

D : Tree system

36 : Which type of distribution is suitable for commercial wiring of multistoried flats? *

2 points

A : Looping out with junction

B : Looping out with switch

C : Bus chamber

D : Raising mains

37: Which system of wiring enables the appliances connected to the system to have same voltage? *

2 points

A : Ring main system

B : Raising main system

C : Distribution board system

D : Tree system

38 : How many earths are to be provided along with the vertical run of raising mains in commercial building wiring? *

2 points

A : 1

B : 2

C : 3

D : 4

39: Which load is to be given separate lines as essential in commercial wiring? *

2 points

A : Stair case and garden

B : Verandah and portico

C : Common walking area

D : Lift and water supply

221 : How many wall socket are located in hall of the building layout? *

2 points

A : 2

B : 3

C : 4

D : 5

222 : What is the name of the symbol marked as x in the layout diagram? *

2 points

A : Single tube fluorescent lamp fitting

B : Twin tube fluorescent lamp fitting

C : Incandescent lamp

D : Fan regulator

223 : What does the marking, marked as x represent in the office layout? *

2 points

A : Size of each wire in mm2

B : Number of wire runs

C : Number of pipes runs

D : Number of wires inside the pipe

224 : Which is the purpose of layout diagram used for building installation? *

2 points

A : To locate the position of electrical points in each used in the building

B : To calculate the total connected load

C : To estimate the labour cost for wiring

D : To estimate the material cost for wiring installation

225 : How many branch circuits are used in the layout diagram? *

2 points

A : 1

B : 2

C : 3

D : 4

226 : How much starting current of motor with respect to load current for calculation of cable size? *

2 points

A : One time of full load current

B : One and half time of full load current

C : Two times of full load current

D : Three times of full load current

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