Wireman 1st year mcq
Wireman – Semester 1 Module 2: Wiring Joints and Soldering
21 : Which is called valance electron in an atom?
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
22 : How many electrons are in a copper atom?
A : 27
B : 28
C : 29
D : 30
23 : How many number of electrons will move in one second for one ampere current through the conductor?
A : 6.24 X 10¹⁵
B : 6.24 X 10¹⁶
C : 6.24 X 10¹⁷
D : 6.24 X 10¹⁸
24 : What is the property of direct current?
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
25 : Which effect is produced, if the current is passed through a conductor?
A : Thermal effect
B : Magnetic effect
C : Chemical effect
D : Electrostatic effect
26 : Which effect is produced, if the current in passed through a coil?
A : Heating effect
B : Chemical effect
C : Magnetic effect
D : Ionisation effect
27 : Which effect of electric current is used for the treatment of mental patient?
A : Shock effect
B : Chemical effect
C : Magnetic effect
D : Ionization effect
28 : What is the name of the effect, if the current is passed through the electrolyte?
A : Heating
B : Chemical
C : Magnetic
D : Thermal
29 : What is the name of the measuring tool?
A : Outside micrometer
B : Inside micrometer
C : Vernier caliper
D : Standard wire gauge
30 : What is the expansion of SWG?
A : standard wire gauge
B : stranded wire gauge
C : standard wire grade
D : standard wire group
31 : Which conductors are used for O.H distribution lines?
A : Insulated conductors
B : Insulated solid conductors
C : Bare conductors
D : Two core cable
32 : What does7 indicates in 7/20 cable?
A : Insulation grade
B : Diameter in mm
C : No of conductor
D : Size of conductor in gauge
33 : Which insulating material is used for insulation tapes?
A : Mica
B : Fibre
C : Plastic
D : Leathroid
34 : What is the reading of the micrometer?
A : 4.05 mm
B : 4.15 mm
C : 4.50 mm
D : 4.55 mm
35 : What is the purpose of additional covering over the insulation of insulated conductor?
A : To increase dielectric strength
B : To add more mechanical strength
C : To increase the current carrying capacity
D : To protect the wire
36 : What is the name of the wire joint?
A : Aerial tap joint
B : T joint
C : Knotted tap joint
D : Plain tap joint
37 : Which joint is suitable for low current circuits only?
A : Double cross tap joint
B : Western union joint
C : Scarfed joint
D : Aerial tap joint
38 : What is the name of the wire joint?
A : Brittania ´T´ joint
B : Western union joint
C : Brittania straight joint
D : Married joint
39 : Which type of tap joint is suitable for more tensile stress?
A : Plain tap joint
B : Aerial tap joint
C : Knotted tap joint
D : Duplex cross joint
40 : Which type of joint is used in overhead lines for extending the length of wire?
A : Scarfed joint
B : BritanniaT joint
C : Western union joint
D : Married joint
41 : What is the name of the soldering?
A : DIP soldering
B : Temperature controlled soldering
C : Soldering with soldering gun
D : Soldering with blow lamp
42 : Which metal is used to make soldering iron bit?
A : Iron
B : Steel
C : Brass
D : Copper
43 : Which soldering method is used to solder under ground cable joints?
A : Dip soldering
B : Soldering iron method
C : Pot and ladle method
D : Machine soldering method
44 : Which solder is used for soldering aluminium conductor?
A : Fine solder
B : Resin core solder
C : Alcap solder
D : Tinman solder
45 : Which soldering flux used for soldering electrical joints?
A : Rosin
B : Zinc chloride
C : Sal ammonia rosin
D : Diluted chloric acid
46 : Which metal is soldered by using zinc chloride flux as solder?
A : Zinc
B : Bronze
C : Gun metal
D : Galvanised iron
47 : Which is to be added to recondition the solder?
A : Tin
B : Zinc
C : Lead
D : Rosine
48 : Which colour band of resistor indicates the multiplier?
A : First band
B : Third band
C : Fourth band
D : Second band
49 : Which resistor is known as photo-Conductors?
A : Light dependent resistor
B : Voltage dependent resistors
C : PTC resistors
D : NTC resistors
50 : Which material is used for making wire wound resistors?
A : Manganin
B : Graphite
C : Tantalum
D : Carbon
51 : Which is the example for metal film resistor?
A : Carbon
B : Eureka
C : Maganin
D : Michrome
52 : What is the reading of galvanometer in whetstone bridge at balanced stage?
A : High deflection
B : Low deflection
C : Null deflection
D : Vibrates
53 : Which formula is used to calculate the value of unknown resistance (Rx) in Wheatstone bridge?
A:
B: 
C:
D:
54 : What is the condition, if zero current is flowing through the galvanometer in Wheatstone bridge?
A : Balanced
B : Unbalanced
C : Short-circuited
D : Open circuited
55 : 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?
A : 480Ω
B : 320Ω
C : 280Ω
D : 240Ω
