Electrical Engg. By Ashish sir

27. The governing principle of steam turbines are ________________. a. Nozzle control governing b. Throttle governing c. Bypass governing d. All of these

26. The pipes carrying the steam are made of _________. a. Steel b. Cast iron c. Aluminium d. Cobalt

25. A steam turbine with no nozzle is ________________. a. Reaction turbine b. Impulse turbine c. Both (a) and (b) d. None of these

24. Turbo alternators run at speeds a. Constant speed of 3000 rpm. b. Constant speed of 1000 rpm. c. A variable speed of above 1000 rpm. d. None of the above

23.The state of discharge of a lead-acid cell is determined by A. e.m.f. of the cell B. specific gravity of the electrolyte C. colour of plates of the cell D. none of these E. all of these

22.The reluctance of a magnetic circuit depends upon A. current in the coil B. number of turns of the coil C. flux density in the circuit D. none of these E. voltage in the coil

21..The capacitance of a parallel-plate capacitor does not depend upon ? A. area of plates B. medium between plates C. separation between plates D. metal of plates E. none of these

20 .Kirchhoff’s voltage law deals with A. conservation of energy B. conservation of charge C. conservation of momentum D. conservation of angular momentum E. none of these

19.Two equal resistances are connected in series across a certain supply. If the resistances are now connected in parallel, the power produced will become A. two times B. four times C. one-half D. three times E. six times

18.When the relative permeability of a material is slightly less than 1, it is called a A. diamagnetic material B. paramagnetic material C. ferromagnetic material D. magnetic material E. electromagnetic material

17.Ampere hour is the unit of A. Quantity of electricity B. Strength of current C. Power D. Energy E. Inductance

17.What quantity of charge must be delivered by a battery with a potential difference of 100 V to do 500 J of work? A. 5 C B. 15 C C. 50 C D. 500 C E. 250 C

16.Conductivity is the reciprocal of? A. current density B. resistance C. resistivity D. superconductivity E. capacitance

15. In the case of wave wound generators, the average pitch is

14.The commutator segments are connected to the armature conductor by means of

The armature of the DC generator is laminated to