ONLINE MCQ EE AND ECE-Measurements and Instrumentation Part 7

[1] A mulliammeter can be used as
(a) Voltmeter and ammeter
(b) Wattmeter
(c) Ohmmeter
(d) Frequency meter

Answer

[2] Which instrument has identical calibration for ac as well as dc values?
(a) Hot wire type
(b) Moving coil type
(c) Induction type
(d) Moving iron type

Answer

[3] An instrument to be used for measurement and control should preferably have
(a) Dead zone and dead time
(b) Linear output and fast response
(c) Non-linear output
(d) A highly damped response

Answer

[4] The current coil of a wattmeter is connected to the CT of R-phase. The potential coil is connected across Y and B phases. The wattmeter measures
(a) Active power in R phase
(b) Active power of Y phase
(c) Reactive power of R phase
(d) Power proportional to 3 phase power if the load is balanced

Answer

[5] The problem of Electro-static coupling in a transformer is acute at
(a) Low frequencies
(b) Power frequencies
(c) High frequencies
(d) High load on the transformer

Answer

[6] Which meter is suitable for the measurement of 10mV at 50MHz?
(a) Moving iron voltmeter
(b) VTVM
(c) Moving coil voltmeter
(d) CRO

Answer

[7] It can be stated that
(a) CT operates at almost the same flux density as a PT
(b) CT operates with a higher flux density than PT
(c) CT operates with considerably lower flux density than a PT
(d) no generalisation can be made with regard to the flux densities in CT and PT

Answer

[8] The thermocouple instruments do not have
(a) High sensitivity
(b) Absence of frequency error
(c) Independence of ambient temperature
(d) High degree of measuring accuracy

Answer

[9] Some wire- wound resistors have bifilar winding. This type of winding is used to
(a) Increase the thermal stability
(b) Reduce the tolerance
(c) Reduce the inductance of winding
(d) Double the power rating of the resistor

Answer

[10] Wien bridge is useful for measuring
(a) Very high frequency
(b) Low frequency
(c) Medium frequency
(d) High frequency

Answer

[11] A megger is usually

(a) Moving iron type instrument
(b) Electro-static type instrument
(c) Hot-wire type instrument
(d) Moving coil type instrument

Answer

[12] A moving iron ammeter may be compensated for frequency errors by
(a) a shunt resistance
(b) a series inductance
(c) shunt capacitance
(d) series resistance

Answer

[13] Ryall crest voltmeter is used for measurement of
(a) AC voltage of any form
(b) Low frequency voltage
(c) High DC voltage
(d) High AC voltage

Answer

[14] Jewels are used in instruments for the purpose of
(a) Damping
(b) Torque control
(c) Suppressing noise
(d) Bearing

Answer

[15] The thermocouple instrument will measure
(a) Current
(b) Voltage
(c) Flux
(d) None of the above

Answer

ONLINE MCQ EE AND ECE-Measurements and Instrumentation Part 8
ONLINE MCQ EE AND ECE-Measurements and Instrumentation Part 6

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