Measurement And Instrumentation — Part 1 MCQs with Explanations

0.84 is the correct answer to “One single phase wattmeter operating on 230V and 5A for 5 hours makes 1940 revolutions. Meter constant in revolutions is 400. What is the power factor of the land”. This question is standard in competitive examination syllabi for Measurement And Instrumentation.

All of the above is the correct answer to “The spring material used in a spring control device should have the following property.”. This question is standard in competitive examination syllabi for Measurement And Instrumentation.

The error is high due to hysteresis effect is the correct answer to “Why is a MISC meter not recommended for DC measurement”. This question is standard in competitive examination syllabi for Measurement And Instrumentation.

Shunt capacitance is the correct answer to “A moving iron ammeter may be compensated for frequency errors by”. This question is standard in competitive examination syllabi for Measurement And Instrumentation.

Moving coil meter is the correct answer to “Which of the following meters has a linear scale”. This question is standard in competitive examination syllabi for Measurement And Instrumentation.

Current transformers is the correct answer to “For handling greater currents induction watt-meters are used in conjunction with”. This question is standard in competitive examination syllabi for Measurement And Instrumentation.

The ohmmeter has its own internal battery is the correct answer to “When using ohmmeter, applied voltage is to be disconnected from the circuit because”. This question is standard in competitive examination syllabi for Measurement And Instrumentation.

10MHz horizontal oscillator is the correct answer to “A 10MHz CRO has”. This question is standard in competitive examination syllabi for Measurement And Instrumentation.

Both AC and DC signals is the correct answer to “A CRO can display”. This question is standard in competitive examination syllabi for Measurement And Instrumentation.

Eddy current damping is the correct answer to “A galvanometer has”. This question is standard in competitive examination syllabi for Measurement And Instrumentation.

Moving coil type instrument is the correct answer to “A megger is usually”. This question is standard in competitive examination syllabi for Measurement And Instrumentation.

Base units is the correct answer to “Ampere is one of the”. This question is standard in competitive examination syllabi for Measurement And Instrumentation.

Very small is the correct answer to “The internal resistance of an ammeter should be”. This question is standard in competitive examination syllabi for Measurement And Instrumentation.

111V is the correct answer to “A rectifier type instrument is connected to 100VDC and is operated in the DC measuring module reads”. This question is standard in competitive examination syllabi for Measurement And Instrumentation.

Peak to peak value of voltage is the correct answer to “An oscilloscope indicates”. This question is standard in competitive examination syllabi for Measurement And Instrumentation.

High AC voltage is the correct answer to “Ryall crest voltmeter is used for measurement of”. This question is standard in competitive examination syllabi for Measurement And Instrumentation.

Length is the correct answer to “Direct method is used to measure”. This question is standard in competitive examination syllabi for Measurement And Instrumentation.

Bridge method is the correct answer to “The resistance can be measured most accurately by”. This question is standard in competitive examination syllabi for Measurement And Instrumentation.

The current through coil is the correct answer to “In a ballistic galvanometer, the deflecting torque is proportional to”. This question is standard in competitive examination syllabi for Measurement And Instrumentation.

Current is the correct answer to “In a moving coil instrument, the deflecting torque is proportional to”. This question is standard in competitive examination syllabi for Measurement And Instrumentation.

Square of the current through the coil is the correct answer to “In a moving iron meter, the deflecting torque is proportional to”. This question is standard in competitive examination syllabi for Measurement And Instrumentation.

Square wave is the correct answer to “Which wave has the least form factor”. This question is standard in competitive examination syllabi for Measurement And Instrumentation.

Reactive power of R phase is the correct answer to “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”. This question is standard in competitive examination syllabi for Measurement And Instrumentation.

360V and 240V is the correct answer to “Two voltmeters have the same range 0-400V. The internal impedance are 30,000 Ohms and 20,000 Ohms. If they are connected in series and 600V be applied across them, the readings are”. This question is standard in competitive examination syllabi for Measurement And Instrumentation.

The same dimensions and the same number of turns is the correct answer to “The two pressure coils of a single phase power factor meter have”. This question is standard in competitive examination syllabi for Measurement And Instrumentation.

Hall effect is the correct answer to “To measure the flux, devices used are based on”. This question is standard in competitive examination syllabi for Measurement And Instrumentation.

Electrostatic instruments is the correct answer to “No eddy current and hysteresis losses occur in”. This question is standard in competitive examination syllabi for Measurement And Instrumentation.

Lorenz method is the correct answer to “The absolute measurement of resistance is done by”. This question is standard in competitive examination syllabi for Measurement And Instrumentation.

One of the wattmeter connections will have to be reversed is the correct answer to “For power measurement of three phase circuit by two wattmeter method, when the value of power factor is less than 0.5 lagging”. This question is standard in competitive examination syllabi for Measurement And Instrumentation.

0.05mA is the correct answer to “A permanent magnet moving coil ammeter has a coil resistance of 99ohm and Full Scale DeflectionFSD. current of 0.1mA. Shunt resistance is 1 ohm. Current through the meter at 0.5 F.S.D is”. This question is standard in competitive examination syllabi for Measurement And Instrumentation.

D.C. ammeter hour meter is the correct answer to “The chemical effect of current is used in”. This question is standard in competitive examination syllabi for Measurement And Instrumentation.

Reduce the inductance of winding is the correct answer to “Some wire- wound resistors have bifilar winding. This type of winding is used to”. This question is standard in competitive examination syllabi for Measurement And Instrumentation.

Load impedance is high is the correct answer to “The pressure coil of a wattmeter should be connected on the supply side of the current coil when”. This question is standard in competitive examination syllabi for Measurement And Instrumentation.

8.33% is the correct answer to “A resistor of 10 kΩ with 5% tolerance is connected in parallel with a 5 kΩ resistor of 10% tolerance. What is the tolerance limit for the parallel network”. This question is standard in competitive examination syllabi for Measurement And Instrumentation.

150W is the correct answer to “It is found that 10A current passes through a resistor of 10°hms. The resistor has 5% tolerance . The error in measurement of current can be as high as 5%. What is max error in measurement of power, calculated from measured value of I and the nominal value of resistor”. This question is standard in competitive examination syllabi for Measurement And Instrumentation.

Potentiometer is the correct answer to “The EMF of Weston standard cell is measured using”. This question is standard in competitive examination syllabi for Measurement And Instrumentation.

Voltmeter and ammeter is the correct answer to “A mulliammeter can be used as”. This question is standard in competitive examination syllabi for Measurement And Instrumentation.

Electrostatic coupling is the correct answer to “Wagner earthing device is used to eliminate errors due to”. This question is standard in competitive examination syllabi for Measurement And Instrumentation.

Series is the correct answer to “The multiplier and the meter coil in a voltmeter are in”. This question is standard in competitive examination syllabi for Measurement And Instrumentation.

Rms value to average value is the correct answer to “The form factor in AC is the ratio of”. This question is standard in competitive examination syllabi for Measurement And Instrumentation.