Measurement and Instrumentation Online Quiz Questions - Set 03 - ObjectiveBooks

# Practice Test: Question Set - 03

1. It is required to measure the true open circuit e.m.f. of a battery. The best device is
(A) D.C. voltmeter
(B) Ammeter and a known resistance
(C) D.C. potentiometer
(D) None of the above

2. In order to achieve high accuracy, the slide wire of a potentiometer should be
(A) As long as possible
(B) As short as possible
(C) Neither too small not too large
(D) Very thick

3. For measurement of mutual inductance we can use
(A) Anderson bridge
(B) Maxwell's bridge
(C) Heaviside bridge
(D) Any of the above

4. A power factor meter has
(A) One current circuit and two pressure circuits
(B) One current circuit and one pressure circuit
(C) Two current circuits and one pressure circuit
(D) None of the above

5. In Weston synchronoscope the moving coil is connected across
(A) Bus-bars
(B) Incoming alternator
(C) Fixed coils
(D) Any of the above

6. Operating torques in analogue instruments are
(A) Deflecting and control
(B) Deflecting and damping
(C) Deflecting, control and damping
(D) Vibration and balancing

7. A sensitive galvanometer produces large deflection for a
(A) Small value of current
(B) Large value of current
(C) Large value of power
(D) Large value of voltage

8. In an energy meter braking torque is produced to
(A) Safe guard it against creep
(B) Brake the instrument
(C) Bring energy meter to stand still
(D) Maintain steady speed and equal to driving torque

9. The principle on which vector voltmeter is based is
(A) That it works on the principle of complex variation
(B) That it measures the response of linear ramp voltage
(C) Same as digital meter
(D) That it measures the amplitude of a single at two points and at the same time measures their phase difference

10. Commonly used instruments in power system measurement are
(A) Induction
(B) Moving coil or iron
(C) Rectifier
(D) Electrostatic

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