Electrical Measurement and Instrumentation Objective Questions - Set 05 - ObjectiveBooks

Practice Test: Question Set - 05

1. The gravity controlled instrument has crowded scale because current is proportional to
(A) Balancing weight
(B) Deflection angle
(C) Sine of deflection angle
(D) None of these

2. Systematic errors are
(A) Instrumental errors
(B) Environmental errors
(C) Observational errors
(D) All of the above

3. In a dynamometer 3-phase power factor meter, the planes of the two moving coils are at
(A) 0°
(B) 60°
(C) 90°
(D) 120°

4. A universal RLC bridge uses
(A) Maxwell bridge configuration for measurement of inductance and De Santa’s Bridge for measurement of capacitance
(B) Maxwell Wien Bridge for measurement of inductance and modified De Santy's bridge for measurement of capacitance
(C) Maxwell Wien Bridge for measurement of inductance and Wien Bridge for measurement of capacitance
(D) Any of the above

5. A voltage of about 200 V can be measured
(A) Directly by a D.C. potentiometer
(B) A D.C. potentiometer in conjunction with a volt ratio box
(C) A D.C. potentiometer in conjunction with a known resistance
(D) None of the above

6. In a 3-phase power measurement by two wattmeter method the reading of one of the wattmeter was zero. The power factor of the load must be
(A) Unity
(B) 0.5
(C) 0.3
(D) Zero

7. The scale of a rectifier instrument is
(A) Linear
(B) Nonlinear
(C) Either (A) or (B)
(D) Neither (A) nor (B)

8. The household energy meter is
(A) An indicating instrument
(B) A recording instrument
(C) An integrating instrument
(D) None of the above

9. Most common form of A.C. meters met with in every day domestic and industrial installations are
(A) Mercury motor meters
(B) Commutator motor meters
(C) Induction type single phase energy meters
(D) All of the above

10. Resistances can be measured with the help of
(A) Watt-meters
(B) Voltmeters
(C) Ammeters
(D) Ohmmeters and resistance bridges

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