Electrical and Electronics Measurements and Instrumentation Online Test 1 – Randomized MCQs

Q-1.The standardization of a.c potentiometer is done by

Q-2.In an induction type energy meter, compensation for static friction is provided by

Q-3.The resolution of a 12-bit analog to digital converter in per cent is

Q-4.In order that photoelectric emission to be possible over whole of the visible spectrum of 370 nm – 770 nm, the work function of the photoemission surface should be approximately :

Q-5.Turns compensation is used in current transformer primarily for reduction of :

Q-6.A meggar is used for measurement of

Q-7.The power limit of useful working range of a transducer is determined by

Q-8.Pulses of frequency 1 MHz are applied to the time base selector of a digital frequency meter which consists of 6 frequency dividers, each dividing the incoming frequency by a factor of 10. What is the time base setting at the output of 4^th frequency divisor?

Q-9.Absolute encoders are used for

Q-10.In series type ohmmeters, zero adjustment should be done by

Q-11.The burden of current transformer is express in terms of :

Q-12.The luminous sensitivity of gas filled photoelectric cells varies between :

Q-13.One of the following can act as an inverse transducer

Q-14.The power consumption of a dc voltmeter using a direct coupled amplifier when measuring a voltage of 0.5 volt and having an input impedance of 10 MΩ is

Q-15.Ratio error in a CT can be reduced by

Q-16.If the distance of screen from a CRT to centre of deflection plates is 15 cm, the length of deflection plates is 2 cm, the distance between plates is 1 cm and accelerating voltage is 500 V. the deflection sensitivity is :

Q-17.The sensitivity factor of strain gauge is normally of the order of

Q-18.The resistance coil of a winding has a distributed capacitance of 9 pF. When wound in a single section. The same winding is sectionalized and is wound in three sections connected in series.The distributed capacitance of the winding with new arrangement is :

Q-19.Cascade connection of transformer is normally used when a single transformer cannot be used because the minimum testing voltage:

Q-20.The shunt resistance in an ammeter is usually

Q-21.Transformation ratio of a PT is defined as

Q-22.Purely mechanical instruments cannot be used for dynamic measurement because they have:

Q-23.The pulse rise time is defined as the time taken by the pulse

Q-24.The power requirement of LED is

Q-25.The output of an OPAMP is 2 V peak. The slew rate is 5 V / µ. The input sinusoidal which can be reproduced with no distortion has the maximum frequency of :

Q-26.The side of air cored transducers as compared ith their iron cored counterparts is

Q-27.The visible spectrum has wavelengths ranging from :

Q-28.The decrease in the value of emf of an unsaturated Weston Cell is :

Q-29.The reason for using ring type specimens for ballistic tests is :

Q-30.A unknown resistance is measured by substitution method. First a standard known resistance of 100 Ω is connected in series with a circuit having a rheostat and a galvanometer. The battery voltage is 10V and the setting of rheostat is 500 Ω and the galvanometer shows a deflection of 60°. After this test. The battery voltage goes down to 9 V and when the unknown resistance is substituted for the known resistance, the galvanometer again shows a deflection of 60° with the same setting of the rheostat. The value of unknown resistance is :