Wireman – Semester 1, Module 2: Wiring Joints and Soldering

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Common for Wireman Trade 1st Year

NAME *

NAME OF THE ITI *

MOBILE NUMBER *

1 : Which is called valance electron in an atom? *

2 points

A : Half the total No of electron

B : No: of electron in middle orbit

C : No: of electron in inner most orbit

D : No: of electron in the outer most orbit

2 : How many electrons are in a copper atom? *

2 points

A : 27

B : 28

C : 29

D : 30

3 : How many number of electrons will move in one second for one ampere current through the conductor? *

2 points

A : 6.24 X 10¹⁵

B : 6.24 X 10¹⁶

C : 6.24 X 10¹⁷

D : 6.24 X 10¹⁸

4 : What is the property of direct current? *

2 points

A : Magnitude and direction of current changes with time

B : Magnitude and direction of current remains constant

C : Direction of current changes with time

D : Magnitude of current changes with time

5 : Which effect is produced, if the current is passed through a conductor? *

2 points

A : Thermal effect

B : Magnetic effect

C : Chemical effect

D : Electrostatic effect

6 : Which effect is produced, if the current in passed through a coil? *

2 points

A : Heating effect

B : Chemical effect

C : Magnetic effect

D : Ionisation effect

7 : Which effect of electric current is used for the treatment of mental patient? *

2 points

A : Shock effect

B : Chemical effect

C : Magnetic effect

D : Ionization effect

8 : What is the name of the effect, if the current is passed through the electrolyte? *

2 points

A : Heating

B : Chemical

C : Magnetic

D : Thermal

9 : What is the name of the measuring tool? *

2 points

A : Outside micrometer

B : Inside micrometer

C : Vernier caliper

D : Standard wire gauge

10 : What is the expansion of SWG? *

2 points

A : standard wire gauge

B : stranded wire gauge

C : standard wire grade

D : standard wire group

11 : Which conductors are used for O.H distribution lines? *

2 points

A : Insulated conductors

B : Insulated solid conductors

C : Bare conductors

D : Two core cable

12 : What does 7 indicates in 7/20 cable? *

2 points

A : Insulation grade

B : Diameter in mm

C : No of conductor

D : Size of conductor in gauge

13 : Which insulating material is used for insulation tapes? *

2 points

A : Mica

B : Fibre

C : Plastic

D : Leathroid

14 : What is the reading of the micrometer? *

2 points

A : 4.05 mm

B : 4.15 mm

C : 4.50 mm

D : 4.55 mm

15 : What is the purpose of additional covering over the insulation of insulated conductor? *

2 points

A : To increase dielectric strength

B : To add more mechanical strength

C : To increase the current carrying capacity

D : To protect the wire

16 : What is the name of the wire joint? *

2 points

A : Aerial tap joint

B : T joint

C : Knotted tap joint

D : Plain tap joint

17 : Which joint is suitable for low current circuits only? *

2 points

A : Double cross tap joint

B : Western union joint

C : Scarfed joint

D : Aerial tap joint

18 : What is the name of the wire joint? *

2 points

A : Brittania ´T´ joint

B : Western union joint

C : Brittania straight joint

D : Married joint

19 : Which type of tap joint is suitable for more tensile stress? *

2 points

A : Plain tap joint

B : Aerial tap joint

C : Knotted tap joint

D : Duplex cross joint

20 : Which type of joint is used in overhead lines for extending the length of wire? *

2 points

A : Scarfed joint

B : BritanniaT joint

C : Western union joint

D : Married joint

21 : What is the name of the soldering? *

2 points

A : DIP soldering

B : Temperature controlled soldering

C : Soldering with soldering gun

D : Soldering with blow lamp

22 : Which metal is used to make soldering iron bit? *

2 points

A : Iron

B : Steel

C : Brass

D : Copper

23 : Which soldering method is used to solder under ground cable joints? *

2 points

A : Dip soldering

B : Soldering iron method

C : Pot and ladle method

D : Machine soldering method

24 : Which solder is used for soldering aluminium conductor? *

2 points

A : Fine solder

B : Resin core solder

C : Alcap solder

D : Tinman solder

25 : Which soldering flux used for soldering electrical joints? *

2 points

A : Rosin

B : Zinc chloride

C : Sal ammonia rosin

D : Diluted chloric acid

26 : Which metal is soldered by using zinc chloride flux as solder? *

2 points

: Zinc

B : Bronze

C : Gun metal

D : Galvanised iron

27 : Which is to be added to recondition the solder? *

2 points

A : Tin

B : Zinc

C : Lead

D : Rosine

28 : Which colour band of resistor indicates the multiplier? *

2 points

A : First band

B : Third band

C : Fourth band

D : Second band

29 : Which resistor is known as photo Conductors? *

2 points

A : Light dependent resistor

B : Voltage dependent resistors

C : PTC resistors

D : NTC resistors

30 : Which material is used for making wire wound resistors? *

2 points

A : Manganin

B : Graphite

C : Tantalum

D : Carbon

31 : Which is the example for metal film resistor? *

2 points

A : Carbon

B : Eureka

C : Maganin

D : Michrome

32 : What is the reading of galvanometer in whetstone bridge at balanced stage? *

2 points

A : High deflection

B : Low deflection

C : Null deflection

D : Vibrates

33 : Which formula is used to calculate the value of unknown resistance (Rx) in Wheatstone bridge? *

2 points

34 : What is the condition, if zero current is flowing through the galvanometer in Wheatstone bridge? *

2 points

A : Balanced

B : Unbalanced

C : Short-circuited

D : Open circuited

35 : Calculates the value of unknown resistance(R) is connected in a wheat stone bridge at balanced conditions, if P = 350Ω , S = 200 Ω and Q = 420Ω? *

2 points

A : 480Ω

B : 320Ω

C : 280Ω

D : 240Ω

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