UKPSC Uttarakhand J.E. Exam Sample Question Paper 2013

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UKPSC Uttarakhand J.E. Exam Sample Question Paper 2013

Organisation : Uttarakhand Public Service Commission
Exam : J.E. Exam
Year : 2013
Document Type : Previous Year Question Papers
Subject : Electrical,Agriculture,Mechanical,Civil

J.E. Exam Sample Question Paper :

Electrical Engineering :
Paper-I :
1. The best suitable material for the heating element is
(a) Tungsten
(b) Nichrome
(c) Manganin
(d) Carbon

Related : Uttarakhand Public Service Commission UKPSC J.E. Exam General English Sample Question Paper 2013 : www.pdfquestion.in/8603.html

2. Pure silicon is
(a) a p-type semiconductor
(b) an n-type semiconductor
(c) an intrinsic semiconductor
(d) an extrinsic semiconductor

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3. Impurity atoms to be added to pure silicon in order to make a p-type semiconductor belongs to
(a) Phosphorous
(b) Boron
(c) Antimony
(d) Aluminium

4. Resistivity of a wire depends upon
(a) Material
(b) Area
(c) Length
(d) All of these

5. If a ferromagnetic material is heated upto Curie temperature, it becomes
(a) Permanent magnet
(b) Anti-ferromagnetic material
(c) Diamagnetic material
(d) Paramagnetic material

6. At absolute zero temperature, an intrinsic semiconductor behaves as
(a) a good conductor
(b) a super conductor
(c) an insulator
(d) variable resistor

7. In an intrinsic semiconductor the Fermi level is
(a) closer to valence band.
(b) closer to conduction band.
(c) within the balance band.
(d) midway between the valence and conduction bands.

8. The reluctance offered by a magnetic material is highest when it is
(a) Diamagnetic
(b) Paramagnetic
(c) Ferromagnetic
(d) None of these

9. If temperature of a pure silicon specimen is increased, then
(a) only number of free electrons increase.
(b) only number of free holes increase.
(c) number of free holes and free electrons increases.
(d) only number of free holes decrease.

10. Varnishes protect the insulating materials against
(a) dust and oil
(b) moisture, dirt and oil
(c) moisture and fire hazards
(d) None of the above

11. If a 220 V heater is used on 110 V supply, the heat produced by it will be nearly
(a) one half
(b) twice
(c) one-fourth
(d) four times

12. Two sinusoidal currents are given by following equations :
The phase difference between them is
(a) 105°
(b) 75°
(c) 15°
(d) 60°

13. The reactance offered by a capacitor to an alternating current of frequency 50 Hz is 10 ohm. If frequency is increased to 100 Hz, the reactance will be
(a) 2.5 ohm
b) 5.0 ohm
(c) 20.0 ohm
(d) 40.0 ohm

14. The r.m.s. value of a half-wave rectified alternating current is 10 A. Its value for full-wave rectification will be
(a) 20/ p A
(b) 40/p A
(c) 20 /2 A
(d) 20 A

15. In the following figure, the resistance measured across A and B will be
(a) 5 kW
(b) 10 kW
(c) 15kW
(d) 20 kW

16. In the following figure, the voltage across C1 will be
(a) 100 V
(b) 200 V
(c) 150 V
(d) 300 V

17. An alternating current given by i = 14.14 sin has an r.m.s. value of
(a) 1.96 A
(b) 7.07 A
(c) 10.0 A
(d) 14.14 A

18. In the following figure, resistor R2 becomes open circuited, the reading of voltmeter will be
(a) zero
(b) 50 V
(c) 150 V
(d) 200 V

19. The capacity of a battery is measured in
(a) Watts
(b) Watt-hours
(c) Amperes
(d) Ampere-hours

20. If both the number of turns and core length of an inductive coil are doubled, then its self inductance will be
(a) halved
(b) doubled
(c) quadrupled
(d) unaffected

21. Mutual inductance between two magnetically coupled coils depends on
(a) number of turns only
(b) permeability of the core only
(c) cross-sectional area of their common core only
(d) All of the above

22. For sinusoidal waveform, the ratio of average value to r.m.s. value is
(a) p /22
(b) 2/.02
(c) 2/00.2
(d) 2/02 p

23. For an RLC series AC circuit, the current at series resistance is
(a) maximum at lagging power factor
(b) maximum at leading power factor
(c) maximum at unity power factor
(d) minimum at unity power factor

24. If v = (a + jb) and i = (c + jd), then active power is given by
(a) ac + ad
(b) ac + bd
(c) bc – bd
(d) ad + bc

25. If a capacitance is charged by a square wave current source, then the voltage across the capacitor will be
(a) Square wave
(b) Step function
(c) Triangular wave
(d) Zero

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