Q.1. Operating torques in analogue instruments are

(a) deflecting and control (b) deflecting and damping (c)deflecting, control and damping (d) vibration and balancing

Q.2. An instrument transformer is used to extend the rangeof

(a) induction instrument (b) electrostatic instrument (c) movingcoil instrument (d) any of the above

Q.3. A power factor meter is based on the principle of

(a) electrostatic instrument (b) Electrodynamometer instrument(c) Electro thermo type instrument (d) Rectifier typeinstrument.

Q.4.When using the terms "accuracy" and "precision" formeasurements

a. "precision" implies less measurement error than "accuracy" b."accuracy" implies less measurement error than "precision" c."precision" measures the repeatability of a measurement d. bothterms mean the same thing

Q.5. The bridge method commonly used for finding mutualinductance is

(A) Heaviside Campbell bridge (B) Schering bridge (C) De Sautybridge (D) Wien bridge

Q.6. The Q-meter works on the principle of

(A) mutual inductance (B) self inductance (C) series resonance(D) parallel resonance

Q.7. A digital-to-analog converter with a full-scale outputvoltage of 3.5 V has a resolution close to 14 mV. Its bit sizeis

(A) 4 (B) 8 (C) 16 (D) 32

Q.8.Which of the following has the best accuracy

(A).MI meter (B).Moving coil meter (C).Rectifier type meter(D).Thermocouple meter

Q.9.A 0-10 A ammeter has a guaranteed accuracy of 1% of FSD.Thelimiting error while reading 2.5A

(A).1% (B).2% (C).4% (D).none of the above

Q.10.In a transducer the observed output deviates from thecorrect value by constant factor the resulting error is called

(A).Zero Error (B).Sensitivity Error (C).Non-confirmity Error(D).Hysteresis error

Q.11. If the current in a capacitor leads the voltage by 80°,the loss angle of the capacitor is

(a) 10° (b) 80° (c) 120° (d) 170°

Q.12. To avoid the effect of stray magnetic field in A.C.bridges we can use

(a) magnetic screening (b) Wagner earthing device (c) wavefilters (d) any of the above

Q.13. The disc of an instrument using eddy current dampingshould be of

(a) conducting and magnetic material (b) non-conducting andmagnetic material (c) conducting and non-magnetic material (d) noneof the above

Q.14. An induction meter can handle current upto

(a) 10 A (b) 30 A (c) 60 A (d) 100 A

Q.15. Which of the following devices may be used for extendingthe range of instruments ?

(a) Shunts (b) Multipliers (c) Current transformers (d)Potential transformers (e) All of the above

Answer rating: 100% (QA)

Q1 c deflecting control and damping Q2 d any of the above Q3 b Electrodynamometer instrument Q4 b accuracy implies less measurement error than precision Q5 C De Sauty bridge Q6 B self inductance Q7 B ... View the full answer