Wires, Joints - Soldering - U.G. Cables
Electrician Trade Theory, Module-3
Wires, Joints - Soldering - U.G. Cables
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Q1: What is the current carrying capacity of 32 amp rated cable, if it is protected by the rewirable fuse?
- 13 Amp
- 16 Amp
- 26 Amp
- 39 Amp
Q2: What is the possible range to measure the size of the wire in a Standard Wire Gauge (SWG)?
- 0-44
- 0-42
- 0-38
- 0-36
Q3: What is the name of the wire joint?
- Aerial tap joint
- Knotted tap joint
- Duplex cross tap joint
- Double cross tap joint
Q4: Which type of soldering flux is used for soldering galvanised iron?
- Rosin
- Zinc chloride
- Sal ammonia
- Hydrochloric acid
Q5: Which method of soldering is used for quantity production and for tinning work?
- Dip soldering
- Soldering with a flame
- Soldering with soldering iron
- Soldering with soldering gun
Q6: What is the name of the part marked as ‘X’ in the underground (UG) cable?
- Bedding
- Armouring
- Lead sheath
- Paper insulation
Q7: What is the full form of “XLPE” Cable?
- Cross Line Poly Ethylene
- X’ess Line Phase Earthing
- Cross Linked Poly Ethylene
- Excess Length Paper and Ebonite
Q8: What is the purpose of ‘serving’ layer in underground cable?
- Protect the cable from moisture
- Protect the cable from mechanical injury
- Protect metallic sheath against corrosion
- Protect armouring from atmospheric condition
Q9: Which cable laying method is used in generating station?
- In ducts
- Racks in air
- Along buildings
- Direct in ground
Q10: How many electrons are there in the valence shell of a copper atom?
- 1
- 2
- 8
- 18
Q11: What is the effect of electric current on neon lamp?
- Heating effect
- Magnetic effect
- Chemical effect
- Gas ionization effect
Q12: What is the unit of insulation resistance?
- Ohm
- Kilo ohm
- Milli ohm
- Mega ohm
Q13: Which electrical device is the coarse excess current protection?
- Cartridge fuses
- Rewirable fuses
- Miniature Circuit Breaker (MCB)
- High Rupturing Capacity (HRC) Fuses
Q14: Which type of joint is used for extending the length of conductor in overhead lines?
- Scarfed joint
- Aerial tap joint
- Britannia “T” joint
- Western Union joint
Q15: Which type of soldering flux is used for soldering aluminium conductors?
- Tallow
- Ker-al-lite
- Zinc chloride
- Sal ammonia
Q16: What is the effect on molten solder due to repeated melting?
- Tin content reduced
- Lead content reduced
- Prevent slug formation
- Uneven flowing in joints
Q17: What will happen to PVC insulation in cable if it carries excess current continuously for a long period?
- Voltage drop increases
- Voltage drop decreases
- Insulation resistance increases
- Insulation resistance decreases
Q18: Which method of cable laying is suitable for congested areas?
- Racks in air
- Duct pipes
- Along buildings
- Direct in ground
Q19: What is the name of the part marked ‘X’ in UG cables?
- Serving
- Bedding
- Armouring
- Lead sheath
Q20: What is the fault of U.G cable identified in the circuit?
- Ground fault
- Short circuit fault
- Open circuit fault
- Weak insulation fault
Q21: Which part of the underground cable is protecting the metallic sheath against corrosion?
- Serving
- Bedding
- Armouring
- Lead sheath
Q22: Why the soldering iron must be kept into a stand that not in use while soldering?
- It prevents burns and fire
- To control the excessive heat
- To save the time of soldering process
- To save the operator from electric shock
Q23: Which type of wire joint is found in the junction box?
- Aerial tap joint
- Plain tap joint
- Rat tail joint
- Married joint
Q24: What is the name of the joint?
- Married joint
- Scarfed joint
- Western union joint
- Britannia straight joint
Q25: What is the use of Britannia ‘T’ joint ?
- Extending the length of the lines
- Inside and outside wiring installation
- Mechanical stress not required on conductor
- Tapping the service connection from overhead lines
Q26: Which type of soldering method is used for servicing and repairing work?
- Dip soldering
- Soldering with a flame
- Soldering with soldering gun
- Soldering with a soldering iron
Q27: What is the use of dip soldering method?
- Soft soldering
- Piping and cable soldering work
- Soldering miniature components on PCB
- Soldering sensitive electric components
Q28: Name the part marked ‘X’ of belted U.G cable.
- Jute filling
- Armouring
- Lead sheath
- Paper insulation
Q29: Which insulating material is used as hot pouring compound for making joints in underground cable?
- Polyamine hardener
- Cast resin compound
- Bituminous compound
- Epoxy cast resin compound
Q30: What is the purpose of bedding insulation of U.G. cable?
- Protect the cable from mechanical injury
- Protect the cable from moisture and gases
- Protect armouring from atmospheric condition
- Protect the metallic sheath against corrosion
Q31: Which test is conducted to locate the faults in U.G. cables?
- Loop test
- External growler test
- Break down voltage test
- Insulation resistance test
Q32: What does the number 1.40 represent if a stranded conductor is designated as 7/1.40?
- Area of cross section
- Radius of one conductor
- Diameter of all conductor
- Diameter of each conductor
Q33: What is the value of electrical conductivity of aluminium conductor?
- 61 mho/m
- 56 mho/m
- 35 mho/m
- 28 mho/m
Q34: What is the rating factor of cable provided with coarse excess current protection?
- 1.11
- 1.23
- 0.81
- 0.707
Q35: What is the size of neutral conductor compared to phase conductor in U.G cable?
- Same size of phase conductor
- Half size of phase conductor
- 1/4 size of phase conductor
- 1/3 size of phase conductor
Q36: What is the name of the tool?
- Cutting plier
- Wire stripper
- Crimping tool
- Side cutting plier
Q37: Which type of joint is used in over head lines for high tensile strength?
- Scarfed joint
- Britannia ‘T’ joint
- Western union joint
- Britannia straight joint
Q38: What is the reading of the micrometer?
- 5.05 mm
- 5.00 mm
- 4.55 mm
- 4.05 mm
Q39: Which method of soldering is used for repairing the vehicle body?
- Dip soldering
- Soldering with flame
- Soldering with soldering iron
- Soldering with soldering gun
Q40: What is the advantage of stranded conductor over solid conductor?
- Cost is less
- More flexible
- Less voltage drop
- More insulation resistance
Q41: What is the current capacity of the 16 Amp. Cable, if it is protected by coarse excess current protection?
- 11 A
- 13 A
- 15 A
- 18 A
Q42: What is the unit for Quantity of electricity?
- Mho
- Coulomb
- Volt /second
- Ampere/second
Q43: What is the name of the soldering method?
- Dip soldering
- Soldering iron
- Soldering gun
- Soldering with flame
Q44: What formula is used to find Electro Motive Force (EMF)?
- EMF = Potential difference – voltage drop
- EMF = Potential difference + voltage drop
- EMF = Potential difference + voltage drop/2
- EMF = Potential difference + 2 x voltage drop
Q45: What is the current rating factor for close excess current protection of cable?
- 0.81
- 0.92
- 1.23
- 1.5
Q46: What is the disadvantage of solid conductor compared to stranded conductor?
- Less rigidity
- Less flexibility
- Low melting point
- Low mechanical strength
Q47: What is the name of the soldering method?
- Dip soldering
- Soldering with blow lamp
- Soldering with soldering gun
- Temperature controlled soldering
Q48: What is the cause for cold solder defect in soldering?
- Excessive heating
- Insufficient heating
- Incorrect use of solder
- High wattage soldering iron
Q49: What happens to the voltmeter if it is connected as an ammeter?
- Low reading
- No deflection
- Meter burns out
- Overshoot deflection
Q50: Which conductors are used for distribution lines?
- Insulated conductors
- Insulated solid conductors
- Bare conductors
- Two core cable
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