ONLINE MCQ EE AND ECE-Measurements and Instrumentation Part 9


[1] A CRO can display
(a) AC signals
(b) DC signals
(c) Both AC and DC signals
(d) Time invariant signals

Answer
[2] The internal resistance of an ammeter should be
(a) Very small
(b) medium
(c) High
(d) Infinity

Answer
[3] A galvanometer has
(a) air friction damping
(b) fluid friction damping
(c) Spring coil damping
(d) Eddy current damping

Answer
[4] Electrostatic instruments are normally used for
(a) Low current measurements
(b) High current measurements
(c) Low voltage measurements
(d) High voltage measurements

Answer
[5] In a moving coil instrument, the deflecting torque is proportional to
(a) Current
(b) Square of the current
(c) Squareroot of the current
(d)  sine of the measurand

Answer
[6] The absolute measurement of resistance is done by
(a) Ohm’s law method
(b) Bridge Method
(c) Rayleigh method
(d) Lorenz method


Answer
[7] To measure the flux, devices used are based on
(a) Voltaic effect
(b) Piezo-electric effect
(c) Hall effect
(d) Photo-voltaic effect

Answer
[8] The form factor in AC is the ratio of
(a) peak value to average value
(b) peak value to rms value
(c) rms value to average value
(d) rms value to peak value

Answer
[9] PMMC type instruments normally use
(a) Air friction damping
(b) Fluid friction damping
(c) Eddy current damping
(d) None of the above

Answer
[10] In a moving iron meter, the deflecting torque is proportional to
(a) Current through the coil
(b) Square of the current through the coil
(c) Sine of the measurand
(d) Squareroot of the measurand

Answer
[11] In a gravity controlled instrument, the deflection angle is proportional
(a) Measurand
(b) Square of the measurand
(c) sine inverse of measurand
(d) sine of the measurand

Answer
[12] Ampere is one of the
(a) Supplementary units
(b) Derived units
(c) Base units
(d) Units used to measure charge

Answer
[13] Direct method is used to measure
(a) Length
(b) Temperature
(c) Pressure
(d) Voltage

Answer

IMPORTANT ELECTRICAL ENGINEERING UNITS
ONLINE MCQ EE AND ECE-Measurements and Instrumentation Part 8

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