Transmission And Distribution MCQs

Option A: primary transmission

Option B: secondary transmission

Option C: primary distribution

Option D: secondary distribution

Correct Answer: secondary distribution ✔

Option A: dry weather

Option B: winter

Option C: summer heat

Option D: humid weather

Correct Answer: humid weather ✔

Option A: Quartz

Option B: Kaolin

Option C: Felspar

Option D: Silica

Correct Answer: Silica ✔

Option A: Steel cored aluminium

Option B: Galvanised steel

Option C: Cadmium copper

Option D: Any of the above

Correct Answer: Any of the above ✔

Option A: corona losses are minimum

Option B: reactance is high

Option C: sending end voltage is more

Option D: receiving end voltage is more

Correct Answer: corona losses are minimum ✔

Option A: distributors

Option B: generating stations

Option C: service mains

Option D: all of the above

Correct Answer: distributors ✔

Option A: reduces power factor

Option B: corrodes the material

Option C: gives odour

Option D: transfer energy to the ground

Correct Answer: corrodes the material ✔

Option A: 20-30 ohms

Option B: 70—80 ohms

Option C: 100—200 ohms

Option D: 500—1000 ohms

Correct Answer: 100—200 ohms ✔

Option A: 6.6 kV

Option B: 8.8 kV

Option C: 11 kV

Option D: 13.2 kV

Correct Answer: 8.8 kV ✔

Option A: 31.25 percent of copper

Option B: 33.3 percent of copper

Option C: 66.7 percent of copper

Option D: 125 percent of copper

Correct Answer: 31.25 percent of copper ✔

Option A: one-fourth

Option B: one-third

Option C: one-half

Option D: twice

Correct Answer: one-fourth ✔

Option A: 25 percent

Option B: 50 percent

Option C: 75 percent

Option D: 100 percent

Correct Answer: 50 percent ✔

Option A: 400 V

Option B: 11 kV

Option C: 66 kV

Option D: 400 kV

Correct Answer: 11 kV ✔

Option A: 2 m

Option B: 3.5 m

Option C: 6 m

Option D: 8.5 m

Correct Answer: 6 m ✔

Option A: 4.3 m

Option B: 5.5 m

Option C: 7.0 m

Option D: 10.5 m

Correct Answer: 7.0 m ✔

Option A: lead

Option B: rubber

Option C: copper

Option D: iron

Correct Answer: lead ✔

Option A: aluminium

Option B: steel

Option C: brass

Option D: copper

Correct Answer: steel ✔

Option A: copper

Option B: wood

Option C: R.C.C.

Option D: steel

Correct Answer: steel ✔

Option A: copper conductors

Option B: all aluminium conductors

Option C: A.C.S.R. conductors

Option D: none of these

Correct Answer: A.C.S.R. conductors ✔

Option A: unity

Option B: lagging

Option C: leading

Option D: zero

Correct Answer: lagging ✔

Option A: balanced

Option B: unbalanced

Option C: either of the above

Option D: none of the above

Correct Answer: balanced ✔

Option A: lead

Option B: paper

Option C: rubber

Option D: none of the above

Correct Answer: paper ✔

Option A: square conductors

Option B: circular conductors

Option C: rectangular conductors

Option D: sector-shaped conductors

Correct Answer: sector-shaped conductors ✔

Option A: suspension insulators

Option B: pin insulators

Option C: both A. and B.

Option D: none of the above

Correct Answer: suspension insulators ✔

Option A: single phase

Option B: three-phase three wire

Option C: three-phase four wire

Option D: none of the above

Correct Answer: three-phase four wire ✔

Option A: underground

Option B: overhead

Option C: either of the above

Option D: none of the above

Correct Answer: overhead ✔

Option A: 110 V

Option B: 210 V

Option C: 230 V

Option D: 400 V

Correct Answer: 230 V ✔

Option A: Circulating current method

Option B: Thevenin’s theorem

Option C: Superposition of currents

Option D: Direct application of Kirehhoffs laws

Correct Answer: All of the above ✔

Option A: series wound generator

Option B: shunt wound generator

Option C: synchronous generator

Option D: none of the above

Correct Answer: series wound generator ✔

Option A: Radial system

Option B: Ring system

Option C: Inter-connected system

Option D: None of the above

Correct Answer: Radial system ✔

Option A: Direct laying

Option B: Draw-in-system

Option C: Solid system

Option D: All of the above

Correct Answer: All of the above ✔

Option A: 6.6 kV

Option B: 11 kV

Option C: 33 kV

Option D: 66 kV

Correct Answer: 66 kV ✔

Option A: 3.3 kV

Option B: 6.6 kV

Option C: 11 kV

Option D: 33 kV

Correct Answer: 33 kV ✔

Option A: l.lkV

Option B: 3.3kV

Option C: 6.6kV

Option D: llkV

Correct Answer: llkV ✔

Option A: Increase of short-circuit current of the system

Option B: Availability of steady voltage at all loads at the line terminals

Option C: Possibility of better protection for the line due to possible use of higher terminal reactants

Option D: Improvement of power factor at times of moderate and heavy loads

Correct Answer: Increase of short-circuit current of the system ✔

Option A: surge impedance of the line

Option B: conductance of the line

Option C: regulation of the line

Option D: none of the above

Correct Answer: surge impedance of the line ✔

Option A: Seeback effect

Option B: Ferranti effect

Option C: Raman effect

Option D: none of the above

Correct Answer: Ferranti effect ✔

Option A: a long line

Option B: a medium line

Option C: a short line

Option D: any of the above

Correct Answer: a long line ✔

Option A: Resistance

Option B: Inductance

Option C: Capacitance

Option D: All of the above

Correct Answer: All of the above ✔

Option A: Size of the conductor

Option B: Shape of the conductor

Option C: Surface condition of the conductor

Option D: All of the above

Correct Answer: All of the above ✔

Option A: 40—50 meters

Option B: 60—100 meters

Option C: 80—100 meters

Option D: 300—500 meters

Correct Answer: 80—100 meters ✔

Option A: stay wire

Option B: earth wire

Option C: structural components

Option D: all of the above

Correct Answer: all of the above ✔

Option A: Copper

Option B: Aluminium

Option C: Steel

Option D: Tungsten

Correct Answer: Tungsten ✔

Option A: from 2 to 5 years

Option B: 10 to 15 years

Option C: 25 to 30 years

Option D: 60 to 70 years

Correct Answer: 25 to 30 years ✔

Option A: Kelvin’s law

Option B: Ohm’s law

Option C: Kirchhoffs law

Option D: Faraday’s law

Correct Answer: Kelvin’s law ✔

Option A: 11 kV

Option B: 33 kV

Option C: 66 kV

Option D: 400 kV

Correct Answer: 400 kV ✔

Option A: 440 V

Option B: 11 kV

Option C: 33 kV

Option D: 66 kV

Correct Answer: 66 kV ✔

Option A: Distributors

Option B: Service mains

Option C: Feeders

Option D: None of the above

Correct Answer: Service mains ✔

Option A: Overhead system

Option B: Underground system

Option C: Both A. and (b)

Option D: None of the above

Correct Answer: C. Both A. and (b) ✔

Option A: Current will flow to earth

Option B: Supply voltage will drop

Option C: Supply voltage will increase

Option D: No current will flow in the conductor

Correct Answer: Current will flow to earth ✔

Option A: resistivity of conductor material increases

Option B: permeability of conductor material increases

Option C: diameter increases

Option D: frequency increases

Correct Answer: resistivity of conductor material increases ✔

Option A: 1-phase 3 wire

Option B: 1-phase 4 wire

Option C: 3-phase 3 wire

Option D: 3-phase 4 wire

Correct Answer: 1-phase 3 wire ✔

Option A: permeability variation

Option B: corona

Option C: skin effect

Option D: unsymmetrical fault

Correct Answer: skin effect ✔

Option A: electromagnetic induction

Option B: varying the resistance

Option C: varying the reactance

Option D: variable transformer

Correct Answer: varying the reactance ✔

Option A: large

Option B: small

Option C: fluctuating

Option D: any of the above

Correct Answer: small ✔

Option A: reactors

Option B: generators

Option C: transformers

Option D: all of the above

Correct Answer: generators ✔

Option A: armature reactance of both alternators

Option B: reactance of the interconnector

Option C: synchronous reactance of both the alternators

Option D: all of the above

Correct Answer: armature reactance of both alternators ✔

Option A: fall

Option B: rise

Option C: remain unchanged

Option D: none of the above

Correct Answer: remain unchanged ✔

Option A: using reactors

Option B: increasing the load

Option C: adjusting the governor

Option D: reducing the terminal voltage

Correct Answer: adjusting the governor ✔

Option A: the transfer of power will take place with voltage fluctuation and noise

Option B: the transfer of power will take place with least loss

Option C: the stations will fall out of step be¬cause of large angular displacement between the stations

Option D: none of the above

Correct Answer: the stations will fall out of step be¬cause of large angular displacement between the stations ✔

Option A: Short transmission lines

Option B: Medium transmission lines

Option C: Long transmission lines

Option D: Medium as well as long transmission lines

Correct Answer: Short transmission lines ✔

Option A: 150 to 220 kV

Option B: 100 to 120 kV

Option C: 60 to 100 kV

Option D: 20 to 50 kV

Correct Answer: 150 to 220 kV ✔

Option A: presence of ozone detected by odour

Option B: hissing sound

Option C: faint luminous glow of bluish colour

Option D: all of the above

Correct Answer: all of the above ✔

Option A: Frequency of the current

Option B: Size of the conductor

Option C: Resistivity of the conductor material

Option D: All of the above

Correct Answer: All of the above ✔

Option A: large conductor area is required for same power transmission

Option B: short-circuit current of the system is increased

Option C: either of the above

Option D: none of the above

Correct Answer: short-circuit current of the system is increased ✔

Option A: primary winding

Option B: secondary winding

Option C: high voltage winding

Option D: any of the above

Correct Answer: high voltage winding ✔

Option A: Static condenser

Option B: Synchronous condenser

Option C: Tap changing transformer

Option D: Booster transformer

Correct Answer: Booster transformer ✔

Option A: specific volume

Option B: electrical conductivity

Option C: co-efficient of linear expansion

Option D: resistance per unit length for same cross-section

Correct Answer: electrical conductivity ✔

Option A: 132 kV

Option B: 66 kV

Option C: 33 kV

Option D: 11 kV

Correct Answer: 132 kV ✔

Option A: 1.5

Option B: 2.7

Option C: 4.2

Option D: 7.8

Correct Answer: 2.7 ✔

Option A: 1 kV

Option B: 11 kV

Option C: 22 kV

Option D: 33 kV

Correct Answer: 33 kV ✔

Option A: non-sinusoidal

Option B: sinusoidal

Option C: triangular

Option D: square

Correct Answer: non-sinusoidal ✔

Option A: dead ended

Option B: at intermediate anchor towers

Option C: any of the above

Option D: none of the above

Correct Answer: any of the above ✔

Option A: inductors

Option B: capacitors

Option C: synchronous motors

Option D: all of above

Correct Answer: synchronous motors ✔

Option A: 6.6 kV (r.m.s. value)/cm

Option B: 11 kV (r.m.s. value)/cm

Option C: 22 kV (maximum value)/cm

Option D: 30 kV (maximum value)/cm

Correct Answer: 30 kV (maximum value)/cm ✔

Option A: exciters

Option B: series capacitors

Option C: shunt reactors

Option D: voltatre transformers

Correct Answer: exciters ✔

Option A: Circuit breakers

Option B: Isolators

Option C: Load break switch

Option D: Circuit breakers and load break switches

Correct Answer: Isolators ✔

Option A: line is energized

Option B: there is no current in the line

Option C: line is on full load

Option D: circuit breaker is not open

Correct Answer: there is no current in the line ✔

Option A: Current only

Option B: Current and voltage

Option C: Current, voltage and frequency

Option D: Current, voltage, frequency and short time current

Correct Answer: Current, voltage, frequency and short time current ✔

Option A: compensate for skin effect

Option B: neutralise proximity effect

Option C: reduce line inductance

Option D: increase the tensile strength

Correct Answer: increase the tensile strength ✔

Option A: Using a guard ring

Option B: Grading the insulator

Option C: Using long cross arm

Option D: Any of the above

Correct Answer: Any of the above ✔

Option A: current flows through the half cross-section of the conductor

Option B: portion of the conductor near the surface carries more current and core of the conductor carries less current

Option C: portion of the conductor near the surface carries less current and core of the conductor carries more cur¬rent

Option D: any of the above

Correct Answer: portion of the conductor near the surface carries more current and core of the conductor carries less current ✔

Option A: Ring bus-bar scheme

Option B: Single bus-bar scheme

Option C: Breaker and a half scheme

Option D: Main and transfer scheme

Correct Answer: Single bus-bar scheme ✔

Option A: insulin

Option B: bitumen

Option C: varnish

Option D: no insulation is required

Correct Answer: no insulation is required ✔

Option A: semi-circle

Option B: triangle

Option C: ellipse

Option D: catenary

Correct Answer: catenary ✔

Option A: 20—25 km

Option B: 40—50 km

Option C: 60—70 km

Option D: 80—100 km

Correct Answer: 20—25 km ✔

Option A: Low cost

Option B: High mechanical strength

Option C: Longer life

Option D: All of the above

Correct Answer: All of the above ✔

Option A: Radial system

Option B: Tree system

Option C: Ring main system

Option D: All are equally reliable

Correct Answer: Ring main system ✔

Option A: alloy steel

Option B: stainless steel

Option C: mild steel

Option D: high speed steel

Correct Answer: mild steel ✔

Option A: Impedance relay

Option B: Mho’s relay

Option C: Reactance relay

Option D: None of the above

Correct Answer: Mho’s relay ✔