Sample Paper Junior Engineer Electrical [Part-1] – HPSSC Hamirpur

Sample Paper Junior Engineer [Electrical] – HPSSC Hamirpur

1. Load  factor of a power plant is

1. Always less than unity
2. Always greater than unity
3. Equal to unity
4. Equal to zero

2. Which one of the following is a rectangular wave form generator?

1. Monostable
2. Astable
3. Bistable multivibrator
4. None of these

3. Which logic family consumers least power?

1. CMOS
2. ECL
3. TTL
4. None of these

4. An inverter converts

1. AC into DC
2. DC into AC
3. Fixed AC to variable AC
4. None of these

5. Which one is more efficient?

1. Series regulator
2. Shunt regulator
3. Compound regulator
4. None of these

6. In D.C. machine, constant loss is composed of

1. Iron loss and mechanical loss
2. FW and stray load losses
3. Friction, windage (FW) and iron loss and field circuit loss.
4. Iron loss and field circuit loss

7. In the bridge given in the figure, the reading of the high impedance voltmeter is

1. 6.66 V
2. 4.20 V
3. Zero
4. -3.33 V

8. The commutator segments of d.c. machines are made up of

1. Brass
2. Aluminium
3. Copper
4. Hard-drawn copper

9. Which of the following can act as a shield for electromagnetic waves?

1. An iron grid or net
2. A plastic sheet
3. A concentrate wall
4. None of these

10. The direction of rotation of d.c. shunt motor can be reserved by interchanging:

1. Field terminals
2. Armature terminals
3. Either field or armature terminals
4. Supply terminals

11. Ward Leonard method of controlling the speed of dc shunt motor is used

1. Where wide range from zero to normal is required
2. Where speed is both directives is required
3. Where the accuracy of speed control is required
4. All the above

12. The major disadvantage of magnetic tapes id

1. Cost
2. The unreliability of stored data
3. Slow data recording
4. Data is to be accessed sequentially

13. What is the prefix tera equivalent to

1. 10³
2. 10⁶
3. 10⁹
4. 10¹²

14. What is the reciprocal of reactance?

1. Susceptance
2. Inductance
3. Resistance
4. None of these

15. For heating and lighting purpose

1. ac is better than dc
2. dc is better than ac
3. both are equally good for the same RMS value
4. none of these

16. Which network theorem gives a current source equivalent circuit?

1. Norton’s theorem
2. Thevenin’s theorem
3. Reciprocity theorem
4. None of these

17. Which network has its own source or generator?

1. Linear network
2. Active network
3. Passive network
4. Non-linear network

18. What is the unit of susceptance

1. Siemens (2) mho
2. Mho
3. Watts/m²
4. None of these

19. Which one is unipolar transistor?

1. BJT
2. MOSFET
3. FET
4. None of these

20. Power gain of a CE amplifier can be

1. Always positive
2. Always negative
3. Can be positive or negative
4. None of these

21. Doping concentration is highest in

1. Collector
2. Base
3. Emitter
4. Gain

22. A polarized electrolytic capacitor can be used

1. Only is sinusoidal circuits
2. Only in dc circuits
3. In dc and sinusoidal ac circuits
4. In circuits having any arbitrary waveform of current

23. Current gain for a CE amplifier is

1. Positive
2. Negative
3. Both positive and negative
4. None of these

24. The phase sequence of the system shown in the figure is        

1. RYB
2. RBY
3. BRY
4. YBR

25. Superposition theorem is not applicable for

1. Voltage calculations
2. Bilateral elements
3. Power calculations
4. Passive elements

26. Kirchoff’s current law is applicable to only

1. Closed loops in a network
2. Electronic circuits
3. Junctions in a network
4. Electric circuit

27. Electrostatic type instruments are primarily used as

1. Wattmeters
2. Ohmmeters
3. Ammeters
4. Voltmeters

28. The nature of current following in the armature of a dc machine is

1. DC
2. AC
3. DC superimposed over AC
4. Pulsating

29. The primary reason why open-circuit lest is performed on the low-voltage winding of the transformer is that it

1. draws sufficiently large on – load current for convenient reading
2. Requires least voltage to perform the test
3. Needs minimum power input
4. Involve less core loss.

30. The temperature coefficient of an intrinsic semiconductor is

1. Positive
2. Zero
3. Negative
4. Like that of metals

Junior Engineer [Electrical] – Test Series 2018 – Buy Now

31. In DC motor, the laminated yoke can reduce

1. Sparking on load
2. Sped regulation
3. Iron loss
4. Temperature rise

32. A bistable multivibrator has

1. One stable state
2. Two stable state
3. Three stable state
4. Four stable state

33. What are the charge carries in semiconductors?

1. Electrons
2. Ions and electrons
3. Electrons and holes
4. None of these

34. What is β of a transistor having α= 0.95?

1. 15
2. 17
3. 19
4. 21

35. The potential difference between the cathode and grid of picture tube adjusts

1. Contrast control
2. Vertical hold
3. Brightness control
4. None of these

36. In a DC generator, residual magnetism gives zero induced emf then speed will be

1. Very small
2. Rated speed
3. Zero
4. Unpredictable

37. Load factor is the ratio

1. Average load/maximum load
2. Peak load/maximum load
3. Average load/peak load
4. None of these

38. Two transformers connected in parallel will share load according to

1. Efficiency
2. Current
3. Per unit impedance
4. None of these

39. Which of the following is a unipolar device?

1. FET
2. P-N diode
3. Zener diode
4. Ordinary diode

40. Which oscillator has best frequency stability?

1. RC oscillators
2. LC oscillators
3. Crystal oscillators
4. None of these

41. Power factor can be improved by using?

1. Phase advancers
2. Static capacitors
3. Synchronous condensers
4. All of these

42. Which one of the following is an irreversible effect?

1. Joule’s effect
2. Peltier effect
3. Seebeck effect
4. None of these

43. The resistivity of semiconductor decreases within

1. Decreasing temperature
2. Increasing temperature
3. Zero temperature
4. None of these

44. Magnetic keepers are made of

1. Steel
2. Soft iron
3. Nickel
4. Copper

45. The function of interpoles in a dc machine is to

1. Improve communication
2. Reduce losses
3. Compensate for air gap variation
4. Reduce field winding heating

46. For harnessing low variable water heads, the suitable hydraulic turbine with high percentage of reaction and runner adjustable vanes is

1. Kaplan
2. Francis
3. Pelton
4. Impeller

47. Transformer cores are laminated to reduce

1. Eddy current loss
2. Hysteresis loss
3. Ohmic loss
4. Both (a) and (b)

48. The open circuit test on a transformer is conducted to obtain

1. Eddy current loss
2. Ohmic loss
3. Hysteresis loss
4. Core loss

49. The short circuit test on a transformer is conducted to obtain

1. Ohmic losses
2. Core losses
3. Hysteresis loss
4. Both (a) and (b)

50. Transformer maximum efficiency, for a constant load current, occurs at

1. Unity power factor
2. Zero p.f lagging
3. Zero p.f leading
4. 8 p.f

Junior Engineer [Electrical] – Test Series 2018 – Buy Now

Read more: ॥ Part-2 ॥ Part-3 ॥ 

If you want us to post answer key of this paper, do let us know in the comment section.