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ELECTRICAL ENGINEERING QUESTION AND ANSWERS   From Question No. 3526 to3530 Electrical Questions with Answers published here. The Solved Electrical Engineering Question answers are very much useful for preparing the upcoming Recruitment Examinations   3526. In D.C. machines the usual limit of slot pitch is (a) between 5 to 10 mm (b) between 10 to 15 mm (c) between 15 to 20 mm (d) between 25 to 35 mm Answer: (d) between 25 to 35 mm ELECTRICAL ENGINEERING QUESTION AND ANSWERS -2019 3527. The lines of force due to charged particles are (a) always straight (b) sometimes curved (c) always curved (d) none of the above Answer: (c) always curved 3528. A controller, essentially, is a (a) sensor (b) clipper (c) amplifier (d) comparator Answer: (d) comparator ELECTRICAL ENGINEERING QUESTION AND ANSWERS-2021 3529. A Weston frequency meter is (a) moving iron instrument (b) moving coil instrument (c) dynamometer instrument (d) none of the above Answer: (a) moving iron in

3516. The household energy meter is (a) an integrating instrument (b) a recording instrument (c) an indicating instrument (d) none of the above Answer: (a) an integrating instrument 3517. Which of the following devices is used for conversion of co-ordinates ? (a) Microsyn (b) Synchro-resolver (c) Selsyn (d) Synchro-transformer Answer: (b) Synchro-resolver 3518. Induction type single phase energy meters measure electric energy in (a) kW (b) Wh (c) VAR (d) kWh

Question No. 3521.  For power factor correction, synchronous motors operate at (a) normal load with zero excitation (b) no-load and under-excited fields (c) normal load with minimum excitation (d) no-load and greatly over-excited fields Answer: (d) no-load and greatly over-excited fields Question No. 3522.  The field coils of D.C. generator are usually made of (a)  copper (b) mica (c) cast iron (d) carbon Answer: (a)  copper Question No. 3523. An amplidyne can give which of the following characteristics ? (a) Constant current (b) Constant current, constant voltage and constant power (c) Constant current as well as constant voltage

35 11. The electric field at a point situated at a distance d from straight charged conductor is (a) proportional to d (b) inversely proportional to d (c) inversely proportional to d (d) none of the above Answer: (c) inversely proportional to d 35 12 __________ is the common method of applying brushes to the commntator. (a) Radial (b) Reaction (c) Trailing (d) All of the above Answer: (d) All of the above 35 13. An open coil has (a) zero resistance and inductance (b) zero resistance and high inductance (c) infinite resistance and normal inductance

3506 . The electric field intensity at a point situated 4 metres from a point charge is 200 N/C. If the distance is reduced to 2 metres, the field intensity will be (a) 400 N/C (b) 600 N/C (c) 800 N/C (d) 1100 N/C Answer: (c) 800 N/C 3507 . A 500 turns solenoid develops an average induced voltage of 60 V. Over what time interval must a flux change of 0.06 Wb occur to produce such a voltage ? (a) 0.5 s (b) 0.1 s (c) 0.01 s (d) 55 s Answer: (a) 0.5 s 3508 . Which ofthe following materials is used in the manufacture of resistance grids to be used in the starters of large motors ? (a) Copper (b) Cast-iron

3501. When a magnet is in motion relative to a coil the induced e.m.f. does not depend upon (a) pole strength of the magnet (b) motion of the magnet (c) number of turns of the coil (d) resistance of the coil Answer: (d) resistance of the coil 3502. The weight of copper of both armature and field windings decreases with _____ in number of poles. (a) decrease (b) increase (c) either of the above (d) none of the above Answer: (b) increase 3503. Which of the following is the unit of magnetic flux density ? (a) tesla (b) lumens (c) weber (d) none of the above Answer: (a) tesla 3504.  Substances which have permeability less than the permeability of free space are known as (a) ferromagnetic (b) paramagnetic

1. For a D.C. generator when the number of poles and the number of armature conductors is fixed, then which winding will give the higher e.m.f. ? a) Lap winding b) Wave winding c) Either of (a) and (b) above d) Depends on other features of design Answer: b) Wave winding 2. The operation of a D.C. machine with large air gap lengths is comparatively a) quiet b) noisy c) either of the above d) none of the above Answer: a) quiet 3. For which of the following applications a D.C. motor is preferred over an A.C. motor ? a) Variable speed operation b) High speed operation c) Low speed operation d) Fixed speed operation Answer: a) Variable speed operation 4. The stator of a D.C. machine comprises of a) main poles 6) interpoles