mcqelectrical4u

Q.311 To find the most accurate values for resistance and inductance of the transmission line A. End condenser configuration is used B. Pi configuration is used C. T configuration is used D. Distributed parameters configuration is used Ans.: D Q.312 Read More …

Q.296 Fast excitation system of the generator will… A. improve the voltage control B. improve the power factor C. improve the reactive power control D. improve the dynamic stability Ans.: D Q.297 The z matrix of 2 port network is Read More …

Q.281 Two heaters, rated at 500W 250 V each are connected in series across a 250v, 50 Hz mains. The total power drawn from the supply wound be_____watt. A. 500 B. 250 C. 1000 D. 125 Ans.: B Q.282 The Read More …

Q.266 IF the voltage is increased by n times, the size of the conductor would A. increase by n times B. reduce by 1/n times C. increase by n^2 times D. reduce by 1/n^2 times Ans.: D Q.267 The semiconductors Read More …

Q.251 The operating time of a fuse is about A. 0.002 sec. B. 1 sec. C. 0.8 sec D. 1.5 sec. Ans.: A Q.252 A 5° C rise in temperature is observed in a conductor by passing a current. When Read More …

Q.236 The most commonly used material for insulators of overhead lines is A. porcelain B. Glass C. Steatite D. none of the above Ans.: A Q.237 Sag is provided in overhead lines so that A. Safe tension is not exceed Read More …

Q.221 The distribution transformer is rated in A. KW B. KVAR C. KVA D. none of the above Ans.: C Q.222 A circuit breaker, under normal conditions, should be inspected A. every day B. every week C. every month D. Read More …

Q.206 Air blast circuit breaker is used for A. Short duty B. Over currents C. Repeated duty D. Intermittent duty Ans.: C Q.207 _______ has zero temperature co-efficient of resistance A. Carbon B. Aluminium C. Porcelain D. Manganin Ans.: D Read More …