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
0 blogger:
Post a Comment