HAL Placement Paper

Company: Hindustan Aeronautics Limited

HAL Written Test paper Interview
Pattern is General Knowledge :
30 Questions
Electronics :
70 Questions

I. General Knowledge :
1. Governor of uttar Pradesh

2. Lucknow is popular for which fruit:
a) Mango
b) Orange
c) Water fruit

3. The chemical Formula of salt

4. President of India

5. In which district of UP a oil refinery is found

6. Pigeon is the indication of

7. Republic day in India is celebrated on

8. The “Beating the retreat” hasn’t celebrated on republic day, what is its resion…

9. Lucknow city is located near which river

10. Renukot is popular for

11. Firozabad is popular for

12. The first prime minister of India

13. The first President of India

14. The birth day of Pandit Jawahar Lal Nehru is celebrated as:-

15. The writer of ‘Godan’

16. Word ‘Agfa’ is related to

II. Electronics Questions :
1. When the temperature of the room increased then the energy of semiconductor…

2. Power diode is generally made from: – Silicon/Germanium/Both/None of these

3. Thermionic Emission of electron is due to………….

4. When the both junction of NPN diode is reverse biased, then the diode is in which mode:
a) Active
b) Cutoff
c) Saturation
d) inverted

5. Which transistor mode gives the inverted output:
a) Common Emitter
b) Common Base
c) Common Collector
d) None of these

6. Which coupling gives the higher gain in case of amplifier:
a) Capacitor coupling
b) Impedance coupling
c) Transformer coupling

7. Which distortion is least objectionable in audio amplification:
a) Phase
b) Frequency
c) Harmonic
d) Intermediation

8. A narrowband amplifier has a band pass nearly…………of central frequency:
a) 33.3%
b) 10%
c) 50%

9. Frequency of wein bridge oscillator
10. Phase shift oscillator consists:
a) RL
b) RC
c) RLC

11. Crystal oscillator frequency is very stable due to:

12. Multivibrater Produces:
a) Sine wave
b) Square wave
c) Smooth wave
d) sawtooth

13. Convert the 101101 Binary number into octal no:
a) 65
b) 55
c) 51
d) 45

14. 10 in BCD:
a) 10100
b) 1100
c) 010111
d) None of these

15. Which PNP device has a terminal for synchronizing purpose:
a) SCS
b) Triac
c) Diac
d) SUS

16. In 3-Phase full converter, the output during overlap is equal to……………..
17. Addition of indium in semiconductor crystal makes:
a) PNP
b) NPN

18. Free electron exists in which band:
a) 1
b) 2
c) 3
d) Conduction band

19. Ripple factor of half wave rectifier:
a) 1.21
b) 0.48
c) 0.5

20. Efficiency of half wave rectifier:

21. Transistor that can be used in enhancement mode:
a) NPN
b) UJT

21. Following contributes to harmonic distortion in Amplifier:
a) +Ve feedback
b) –Ve feedback
c) Defective active device

22. High cutoff frequency:
a) CB
b) CC
c) CE

23. Which is used as data selector?
a) Encoder
b) Decoder
c) modulator
d) Demodulator

24. Read write capable memory:
a) RAM
b) ROM
c) Both
d) None of these

25. When modulation frequency is doubled, modulation index also doubled in case of:
a) FM
b) PM
c) AM
d) PM & FM

26. Term ’Noise temperature’ is used for

27. Video detector used in TV receiver is a….
a) Diode detector
b) Ratio detector
c) Phase detector

28. Which isn’t directly operated from mains:
a) Half wave rectifier
b) Centre tap rectifier
c) Bridge rectifier
d) Voltage doubler

29. In 3-Phase half wave rectifier each diode conducts for duration of:
a) 30 Degree
b) 45 Degree
c) 60 Degree
d) 180 Degree

30. Transistor is a following operated device:
a) Low voltage & low current device
b) Low voltage & high current device
c) Low current & high voltage device
d) High current & high voltage device

31. If number of phase in a multiphase rectifier increased then:
a) Output increased
b) Output decreased
c) Output smooth
d) No change

32. Which output requires minimum filtration:
a) Half wave rectifier
b) full wave
c) SCR half wave rectifier
d) Voltage doubler

33. Identify the under circuit
a) Low pass filter
b) High pass filter
c) Band pass filter

HAL Placement Paper

About HAL

Hindustan Aeronautics Limited is an Indian state-owned aerospace and defence company, headquartered in Bangalore, India. Established on 23 December 1940, HAL is one of the oldest and largest aerospace and defence manufacturers in the world today..visit offical website of HAL for more details.

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