# Electrical measurements/Electrical Measurement MCQ Question Set 6 Sample Test,Sample questions

## Question: ` Braking system consists of _____`

1.bar magnet

2. temporary magnet

3.permanent magnet

4. super magnet

## Question: ` Current in a pressure coil of the Dynamometer type wattmeter ________`

1.lags the applied voltage

3. is in phase with the applied voltage

4.there is a phase difference of 90 degrees

## Question: ` Driving torque is small and is adjustable.`

1. True

2.False

3.all of the above

4.None of the mentioned

1. voltmeter

2.ammeter

3.ohmmeter

4.wattmeter

## Question: ` Low power factor wattmeters are designed to ________`

1.have a low torque

2.have a high torque

3.have a medium torque

4.have no torque

## Question: ` Magnitude of flux in an energy meter varies _______`

1. due to abnormal currents and voltages

2.due to high resistance and inductance values

3.due to changes in the transformer turns

4.due to the induced e.m.f in the windings

2.lag circuit

3.special design

4.transformer

1.inductance

2.capacitance

3.resistance

4.impedance

1.less

2.more

3.intermediate

4.very less

## Question: ` When a current carrying coil is placed in the magnetic field?`

1.no force is exerted

2.voltage is produced

3.power is generated

4.a force is exerted

## Question: `A dynamometer type wattmeter consists of ________`

1.only potential coil

2.potential and current coils

3.only current coil

4.no coils

## Question: `A wattmeter consists of a current coil and a potential coil.`

1.True

2.False

3.all of the above

4.None of the mentioned

## Question: `An energy meter produces a flux of âˆ… when connected to a supply V.`

1.True

2.False

3.all of the above

4.None of the mentioned

## Question: `As copper shading bands move up _____`

1.more flux is induced

2.less flux is induced

3.intermediate flux is induced

4.no flux is induced

## Question: `At full load, disc ______`

1. partially revolves and then stops

2.continuously revolves

3.does not revolve at all

4.revolves in an alternating fashion

## Question: `At overloads, magnetic shunt ________`

1.aids the series flux

2.diverts series flux

3. maintains zero flux

4.disables the shunt flux

## Question: `Controlling torque is provided by gold springs.`

1.True

2.False

3.all of the above

4.None of the mentioned

## Question: `Copper shading bands are _________`

1. placed as resistance

2. placed as wire

3.placed outside the central limb

4.placed around central limb

## Question: `Driving system in an induction type single phase energy meter consists of ________`

1.one magnet

2.two electromagnets

3.five electromagnets

4. ten magnets

## Question: `Dynamometer type wattmeter has ______`

1. strong magnetic field

2.intermediate magnetic field

3.weak magnetic field

4.no magnetic field

## Question: `Eddy currents are induced in solid metal parts within the thickness of the conductor.`

1. True

2.False

3.all of the above

4.None of the mentioned

## Question: `Energy meter reads correctly when the _______`

1. torque is small

2.torque is large

3. torque is medium

4.torque is zero

## Question: `Error in a pressure coil can be compensated.`

1.True

2.False

3.all of the above

4.None of the mentioned

1.capacitance

2.inductance

3.resistance

4.impedance

## Question: `Friction torque is eliminated by ________`

1.using lubricating oil

2. by suspending the components in air

3.by adjusting the position of limb

4.by using steel alloy components

## Question: `Frictional errors are dominant in an energy meter.`

1.True

2.False

3.all of the above

4.None of the mentioned

1.4

2.3

3.2

4.1

1.small

2.medium

3.large

4.very large

## Question: `Induction type instruments are used for ______`

1.A.C. measurements

2.D.C. measurements

3.Resistance measurements

4.Voltage measurements

## Question: `Moving system of the induction type single phase energy meter has _____`

1.heavy aluminium disc

2. light aluminium disc

3.medium aluminium disc

4.no aluminium disc

## Question: `Obtaining correct reading from the energy meter requires ______`

1.low resistance and iron losses

2.high resistance and iron losses

3.high resistance and low iron losses

4.low resistance and high iron losses

## Question: `Overload compensating devices is ______`

1.in the form of a magnetic shunt

2.in the form of a series magnet

3. in the form of a transformer

4.in the form of a supply

## Question: `Phase angles in an energy meter cannot be incorrect.`

1.True

2.False

3.all of the above

4.None of the mentioned

## Question: `Pressure coil has no error.`

1.True

2.False

3.all of the above

4.None of the mentioned

## Question: `Pressure coil of a wattmeter _____`

1.has capacitance and inductance

2.has inductance and resistance

3. has resistance and capacitance

4.has only inductance

1. once time

2.three times

3.hundred times

4.ten times

## Question: `Self braking action is minimised by _______`

1. maintaining high speed for disc

2.maintaining medium speed for disc

3.keeping the disc at rest

4.maintaining low speed for disc

## Question: `Self braking torque is _____`

1.proportional to cube of load current

3.proportional to square of load current

4.proportional to reciprocal of load current

## Question: `Series electromagnet consists of _________`

1.L shaped laminations

2.T shaped laminations

3.U shaped laminations

4.Y shaped laminations

## Question: `Shading coil consists of many thick turns.`

1.True

2. False

3.all of the above

4.None of the mentioned

4. transformer

## Question: `Shunt magnet consists of _______`

1. N shaped laminations

2. E shaped laminations

3.S shaped laminations

4.M shaped laminations

## Question: `Shunt magnet has _____`

1. large turns of wire

2.small turns of wire

3.medium turns of wire

4.no turns or wires

## Question: `Small torque for energy meter is provided ________`

1.by a supply

4.by a transformer

## Question: `The energy meter always measures the load energy correctly.`

1.True

2. False

3.all of the above

4.None of the mentioned

## Question: `Wattmeter reading has errors induced by _____`

1.resistance

2.self-capacitance

3.self-inductance

4.mutual inductance

## Question: `Wattmeter reading is not affected by temperature.`

1.True

2.False

3.all of the above

4.None of the mentioned

## Question: `Wattmeters are compensated for errors due to inductance by _________`

1. using a series capacitor

2.using a parallel capacitor

3. using a series resistance

4.using a parallel resistance

## Question: `What is the effect of eddy currents in the aluminium disc?`

1.varies by a factor of twice the disc length

2.independent of the disc speed

3. varies by a factor of four times the disc size

4. proportional to the disc speed

## Question: `What is the effect of frequency on the torque of a moving system?`

1.torque is half of the frequency

2.torque is twice the frequency

3. torque is thrice the frequency

4. torque is four times the frequency

## More MCQS

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