Measurement and Instrumentation Objective Questions and Answers - ObjectiveBooks

Measurement and Instrumentation Objective Questions and Answers

Practice Test: Question Set - 10

1. According to application, instruments are classified as
    (A) Switch board
    (B) Portable
    (C) Both (A) and (B)
    (D) None of these

2. The switch board instruments
    (A) Should be mounted in vertical position
    (B) Should be mounted in horizontal position
    (C) Either (A) or (B)
    (D) Neither (A) nor (B)

3. In a Schering bridge the potential of the detector above earth potential is
    (A) A few volts only
    (B) 1 kV
    (C) 5 kV
    (D) 10 kV

4. A multi-range instrument has
    (A) Multiple shunt or series resistances inside the meter
    (B) Multi-coil arrangement
    (C) Variable turns of coil
    (D) Multi range meters inside the measurement system

5. In a low power factor wattmeter the compensating coil is connected
    (A) In series with current coil
    (B) In parallel with current coil
    (C) In series with pressure coil
    (D) In parallel with pressure coil

6. A moving-coil permanent-magnet instrument can be used as flux-meter
    (A) By using a low resistance shunt
    (B) By using a high series resistance
    (C) By eliminating the control springs
    (D) By making control springs of large moment of inertia

7. Which of the following are integrating instruments?
    (A) Ammeters
    (B) Voltmeters
    (C) Watt-meters
    (D) Ampere-hour and watt-hour meters

8. A Weston synchronoscope is a
    (A) Moving coil instrument
    (B) Moving iron instrument
    (C) Dynamometer instrument
    (D) None of the above

9. Wattmeter cannot be designed on the principle of
    (A) Electrostatic instrument
    (B) Thermocouple instrument
    (C) Moving iron instrument
    (D) Electrodynamic instrument

10. Which of the following meters are not used on D.C. circuits?
    (A) Mercury motor meters
    (B) Commutator motor meters
    (C) Induction meters
    (D) None of the above

11. If an inductance is connected in one arm of bridge and resistances in the remaining three arms
    (A) The bridge can always be balanced
    (B) The bridge cannot be balanced
    (C) The bridge can be balanced if the resistances have some specific values
    (D) None of the above

12. Which of the following properties a damping oil must possess?
    (A) Must be a good insulator
    (B) Should be non-evaporating
    (C) Should not have corrosive action upon the metal of the vane
    (D) All of the above

13. In a portable instrument, the controlling torque is provided by
    (A) Spring
    (B) Gravity
    (C) Eddy currents
    (D) All of the above

14. The adjustment of position of shading bands, in an energy meter is done to provide
    (A) Friction compensation
    (B) Creep compensation
    (C) Braking torque
    (D) None of the above

15. For measurement of inductance having high value, we should use
    (A) Maxwell's bridge
    (B) Maxwell Wien bridge
    (C) Hay's bridge
    (D) Any of the above

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