# ONLINE MCQ EE AND ECE-Measurements and Instrumentation Part 3

 The percentage limiting error, in the case
of an instrument reading of 8.3V with a 0 to 150V voltmeter having a
guaranteed accuracy of 1% full-scale reading is

A) 1.810%
B) 0.181%
C) 0.0018%
D) 18.10%

 The induction of  a high Q inductor can be measured by a

A) Schering Bridge
B) Hay Bridge
C) Maxwell Bridge
D) Wien Bridge

 If a DC voltmeter is made from an ammeter having a fed of 100μA then its sensitivity (in KΩ/V) will be

A) 1

B) 100
C) 10
D) 1000

Guidelines: Assertion (A) and Reason (R) type Questions 4 and 5:

(A) Both a and R are correct and R is explanation for A.
(B) Both a and R are correct and R is not explanation for A.
(C) A is true but R is false.
(D) A is false but R is true.

 A: The screen of a CRT is coated with phosphor on the inside.

R: Phosphor absorbs the KE of the bombarding electrons
and re-emits energy at a frequency in the visible region.

  A: The Weign Bridge can be used for frequency measurements.
B: The Weign Bridge uses only capacitors and resistors.

 It is desired to convert a 0-1000A
meter movement, with an internal resistance of 100 ohms, into a 0-100mA
meter. The required value of shunt resistance is about

A) 0.1 ohms

B) 1 ohms
C)  99 ohms
D) 100 ohms

 Match List I with List II:
 List I List II (a) Megger (p) Measurement of loss angle in a dielectric (b) Spectrum analyzer (q) Measurement of frequency (c) Schering bridge (r) Measurement of insulation resistance (d) Digital counter (s) Measurement of harmonics

 In moving coil meters, damping is provided by

A) damping vane in the air tight chamber.
B) the aluminium frame of the coil.
C) eddy current disk.
D) The coil spring attached to the moving mechanism.

 A 0 to 300V voltmeter has a guaranteed accuracy of 1% of full scale
reading. The voltage measured by the instrument is 83V. The percentage
limiting error is

A) 95%

B) 4.85%
C) 3.62%
D)1.81%