# Electrical measurements/Electrical Measurement MCQ Question Set 5 Sample Test,Sample questions

1.10 mA

2.8 mA

3.2 mA

4.Zero

## Question: ` A current of â€“ 8 + 6sqrt{2} (sin (Ï‰t + 30Â°)) A is passed through three meters. The respective readings (in ampere) will be?`

1.8, 6 and 10

2.8, 6 and 8

3.â€“ 8, 10 and 10

4.-8, 2 and 2

1.0.5 A

2.0.25 A

3. 0.707 A

4. 0.67 A

1. 4.5 kâ„¦/V

2.18 kâ„¦/V

3.10 kâ„¦/V

4.9 kâ„¦/V

## Question: ` High flux density is due to less turns.`

1. True

2.False

3.all of the above

4.None of the mentioned

## Question: ` In a moving iron meter, the deflection torque is proportional to?`

1. In a moving iron meter, the deflection torque is proportional to?

2.Current through the coil

3.Sine of measurand

4.The Square root of the measurand

## Question: ` In A.C. circuits, power consumed is ________`

1.product of voltage and current

2.it depends on the p.f. of the circuit in addition to voltage and current

3.it depends on the supply voltage

4.it depends on the magnitude of the circuit current

1.high voltages

2.low voltages

3.high currents

4. low currents

## Question: ` Potential transformers are used with ______`

1. high range voltmeter

2.low range voltmeter

3. intermediate range voltmeter

4.very high range voltmeter

## Question: ` Ratio error can be minimised by _____`

1.reducing the turns

2.reducing the current

3. increasing the voltage

4.using a good core material

## Question: ` The secondary winding of a C.T. is opened when?`

1.C.T. is magnetised

2.C.T. is demagnetised

3.C.T. is shorted

4.C.T. is opened

## Question: ` The secondary winding of a C.T. ________`

1.can be shorted

2.canâ€™t be shorted

3.can be opened

4. canâ€™t be opened

## Question: ` Two 100 Î¼A full-scale PMMC meters are employed to construct a 10 V and a 100 V full-scale voltmeter. These meters will have figure of merit (sensitivities) as?`

1.10 kâ„¦/V and 10 kâ„¦/V

2.100 kâ„¦/V and 10 kâ„¦/V

3.10 kâ„¦/V and 100 kâ„¦/V

4. 10 kâ„¦/V and 1 kâ„¦/V

## Question: ` Winding resistance of a P.T. can be reduced by ______`

1. using thick conductors

2. decreasing the length of the winding

3. shorting the primary and secondary windings

4.using thin conductors

## Question: `A current of [2 + 2â€“âˆš sin (314t + 30) + 22â€“âˆš cos (952t +45)] is measured with a thermocouple type, 5A full scale, class 1 meter. The meter reading would lie in the range?`

1.5 A Â± 1 %

2. (2 + 32â€“âˆš) A Â± 1%

3.3 A Â± 1.7 %

4.2 A Â± 2.5 %

1.0.0216 N-m

2.0.0456 N-m

3. 0.1448 N-m

4.1 N-m

1.63.56 â„¦

2.89.83 â„¦

3.89.83 kâ„¦

4.141.3 kâ„¦

## Question: `Another method of eliminating the ratio error is _____`

1.by reducing secondary turns

2. by increasing the primary turns

3.by increasing secondary turns

4. by reducing the primary turns

## Question: `For a given Vp the Vs ___`

1. increases

2.decreases

3.remains constant

4.depends on the supply

## Question: `High flux density leads to _____`

1. a decreased voltage in the secondary

2.a decreased voltage in the primary

3.a increased voltage in the secondary

4.a decreased voltage in the primary

## Question: `High magnetizing forces in the core when removed suddenly lead to _____`

1.no residue

2.partial residual magnetism

3.rupture of the device

4. residual magnetism

## Question: `How is the transformation ratio dependent on the secondary burden?`

1.decreases

2. increases

3.remains constant

4.depends on the supply

## Question: `In a P.T. values of components of currents are negligible.`

1.True

2.False

3.all of the above

4.None of the mentioned

## Question: `In D.C. circuits, power is measured using ________`

1. ohmmeter and galvanometer

2.ohmmeter and voltmeter

3.ammeter and voltmeter

4.ammeter and galvanometer

## Question: `Increasing secondary burden _______`

1. increases Is

2.decreases Is

3. keeps Is constant

4.decreases Ip

## Question: `Leakage reactance is minimised by _____`

1.using thin conductors

2.reducing leakage flux

3.increasing flux density

4.shorting the windings

## Question: `Moving Iron Instrument can be used as _______`

1.An ammeter for measuring DC as well as AC

2.For measuring DC current and voltages only

3.For measuring DC current and voltages only

4.For measuring AC current and voltages only

## Question: `Potential transformer is similar in design to a _____`

1.C.T.

2.Step up transformer

3.Power transformer

4. Step down transformer

## Question: `Power is ______`

1.rate of doing work

2. rate of producing voltage

3.rate of generating current

4. rate of overcoming friction

## Question: `Ratio error in a P.T. depends on _____`

1.secondary current

2.primary voltage

3.secondary current

4. turns ratio

## Question: `Secondary of a P.T. can be open circuited.`

1.True

2.False

3.all of the above

4.None of the mentioned

1.0.0568

2.0.0887

3. 0.0357

4. 0.0441

1.0.225

2.0.565

3.0.484

4.0.7887

## Question: `The excitation current of a C.T. ______`

1.varies over a fixed range of operation

2.varies over a wide range of normal operation

3. is fixed over a range of operation

4.is fixed always

1.99.90 kâ„¦

2.100 kâ„¦

3. 99.60 kâ„¦

4.100 â„¦

1.49.99 â„¦

2.0.16 â„¦

3. 1.5 â„¦

4.2.6 â„¦

1. 2.4

2.2.0

3.1.2

4.1.0

## Question: `The primary current in a C.T. is _____`

1.independent of secondary circuit

2.dependent on the secondary circuit

3.depends on the transformation ratio

4.depends on the nominal ratio

## Question: `The rectangular type of C.T. is built of ______`

1. L shaped windings

2.T shaped windings

3.A shaped windings

4.Z shaped windings

## Question: `The scale of a dynamometer type instrument marked in terms of RMS value would be_____`

1.Uniform throughout

2.Non-uniform and crowded near the full scale

3.Non-uniform and crowded near the full scale

4.Non-uniform and crowded around mid-scale

## Question: `The secondary circuit of a C.T. is open when?`

1.a very high flux density is produced

2.a very low flux density is produced

3.a moderate flux density is produced

4. no flux density is produced

1.220 V

2.2.2 kV

3.1.1 kV

4. 110 V

## Question: `The standardization of AC potentiometer is done by _____`

1.Using a DC standard source and dâ€™ Arsonval galvanometer

2.Using AC standard sources and transfer instruments

3. Using a standard AC voltage source

4.Using a DC standard source and transfer instruments

1.1 mA

2.10 mA

3.11 mA

4.5 mA

## Question: `Vp is leading in phase, while Vs is lagging in phase.`

1.True

2.False

3.all of the above

4.None of the mentioned

## Question: `What is effect of the secondary burden on the ratio error?`

1. ratio error is constant with secondary burden

2.ratio error decreases with secondary burden

3.ratio error increases with secondary burden

4.depends on the supply voltage

## Question: `What is the effect of p.f. on secondary burden?`

1. Ip shifts towards Io

2.Ip deviates from Io

3. Ip is independent of Io

4.Ip and Io cancel eachother

## Question: `When C.T. is connected in series with a line, a large voltage exists across the primary.`

1. True

2.False

3.all of the above

4.None of the mentioned

## Question: `When primary current flows, secondary circuit should be open.`

1.True

2.False

3.all of the above

4.None of the mentioned

## More MCQS

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