Tiêu đề wEEM April 2023.pdf ✅

vii. The force responsible for reduction of oscillations of pointer in an ammeter is (a) controlling force viii. (ftaf a) iX. (a) Power transfomer (nft vfunfta) (6) Current transfomer(uT qfunfta) The curent range of a DC ammeter can be extended by () damping force (a) Secondary winding current (u FUS{ YRI ) (b) VA rating of the transformer (rtunfa (a) AC Power (yTi fa) The burden of Current transformer is expressed in terms of: (b) DC Power(ftzun Iftt) xii. (c) Voltage, current and power factor of secondary winding circuit (aus qvgt vfyy * atr, YKT y4 t yof ") (d) None of these (0) xiii. Dynamometer type wattmeter can be used to measure: (c) deflecting force (aarH a) VA f~T ) xi. In an electrodynamometer type wattmeter (asAnta var * Test ;) (a) The current coil is made fixed (T FUSef fr q 6T ) (a) Highly resistive (rfu sfit) ZIKI) (c) Shunt(te) (b) The pressure coil is made fixed (GaTA FUg fRr AT RA ) (b) Highly inductive(rfrE Nfre) (c) Any of the two coil may be fixed (arit ~ Æ Nf qVSt r ai BaT ) () Both the coil should be movable (a-i gusct yum afer) (d) Potential transformer (fra vtunfra) The pressure coil of an induction type energy meter is (a) Over compensation for friction (uém tg afr afrgaa) (b) Over voltage(refrs arrr) (a) Average Power (ttea fr) (c) AC & DC power both (ruati va feeurr fs d) (d) None of these ( t Æ T) (b) Maximum Power(3fu44 fn) Creeping in a single phase induction type energy meter may be due to (d) none of these (c) Purely resistive (fNz sfrti) (d) Purely inductive (ryz trfirr) (c) Vibrations(ry=) xiv. A dynamometer type wattmeter gives reading (y SIYAa yAR ÍZfter YJT }AT :) (d) All of the above (3tm m) Page 2 of5 c) R.M.S. Power (3K.4.H. VUtH) (d) None of these (s à ) 215CC33B6C74596AD7FODID4F8535000 2020303-P sbte.way2poly.in
XV. For the measurement of medium resistånce, the best method is (a) Ammeter - voltmeter method (tz -ateta (b) Substitution method (yftrwrya faft) kc) Wheat -stone bridge method (tz Rr fAM faft) (d) Ohm - meter method (sÌH -tr faft) xvi. (á) Induction type energy meter (r HK Ga0tE) Which of the following measuring instrument has no controlling device? (b) Moving iron type meter (ar hE JAR 0ZT) (c) Dynamometer type wattmeter (340T YESR ÍZÍT) (d) Electrodynamometer power factor meter (stazstzt fs Tys fe) Ivii. Meggar is used for the measurement of (E 1 34UT (a) Low resistance (Ar sfaàu) (b) Medium resistance(144 frre) xvii. For measurement of capacitance, the best bridge (a) Ammeter - voltmeter method (T0ZI -treta faft) (b) Maxwell's bridge method(tràr frr af) (b) A Square wave signal(y af atr fRrTeT) c) High resistance (3 sftu) (d) All of the above (3v# ) XX, xix. The time base signal in a CRO is ( CRO HHY 3TUK fETet glar:) method is (urfa HIT fer HAH 3UYH A) (b) Schering bridge(ftr fav) (c) Wien's bridge method (fara fa A) (d) Schering bridge method (ftr far fafr) (c) A Sawtooth signal (y# i ferr) Frequency can be measured by using (rpft YI4 fZI ATaT (a) Wien's bridge (aa fa) () A triangular wave signal (y* firivta aër Rr) (c) Hay's bridge (ta aa) (d) Anderson's bridge (ysr ) Group (B) (g Q.2 Define unit. Explain fundamental and derived units with example. OR (rrr) Write a short note on Classification of measuring instruments. (a) A Simusoidal signal (y tAEST fRIT) sbte.way2poly.in
Q.3 What is the importance of static characteristics of measurement system? OR (U) Explain the different types of errors that may occur in measurement. 0.4 Derive the expression for torque equation for a moving iron instrument and Comment upon the nature of scale. OR (rUar) How would you extend the range of electrostatic voltmeters? Explain. Q.5 Explain the Construction and working of an electrodynamometer typeof wattmeter. I AU0T ) OR (4a) How is the energó in dc circuits measured? Explain. Q.6 -Describe the method of measurement of medium resistances using Wheatstone bridge. OR (reer) Explain Maxwell's bridge for measurement of unknown inductance. Group (C) (gT -) Q.7 Explain the construction and working of pemanent magnet moving coil instrument. Describe why it is used only in DC. OR (rUeT) Why the performance characteristics of measurement systems are classified into static and dynamic characteristics? Explain the types of test signals used for determination of dynamic characteristics. Cot Page 4 of 5 c and 2020303-P 4 4 4 4 6 6 sbte.way2poly.in