HAL Exam Pattern For Electronics

Would you please give here exam paper pattern for Hindustan Aeronautics Limited (HAL) placement exam ?

[shikha]

As per your request here I am giving you exam paper pattern for Hindustan Aeronautics Limited (HAL) placement exam.

HAL placement exam paper pattern :
Total time allotted
60 minutes.

No negative marking in the paper.

Sections:
General awareness :20 questions,
Reasoning :40 Questions
Technical questions :100

Sample questions :
Q.1 The two windings of a transformer is
(A) conductively linked.
(B) inductively linked.
(C) not linked at all.
(D) electrically linked.
Ans : B


Q.2 A salient pole synchronous motor is running at no load. Its field current is switched off. The motor will
(A) come to stop.
(B) continue to run at synchronous speed.
(C) continue to run at a speed slightly more than the synchronous speed.
(D) continue to run at a speed slightly less than the synchronous speed.
Ans: B

Q.3 The d.c. series motor should always be started with load because
(A) at no load, it will rotate at dangerously high speed.
(B) it will fail to start.
(C) it will not develop high starting torque.
(D) all are true.
Ans: A

Q.4 The frequency of the rotor current in a 3 phase 50 Hz, 4 pole induction motor at full
load speed is about
(A) 50 Hz.
(B) 20 Hz.
(C) 2 Hz.
(D) Zero.
Ans: C

Q.5 In a stepper motor the angular displacement
(A) can be precisely controlled.
(B) it cannot be readily interfaced with micro computer based controller.
(C) the angular displacement cannot be precisely controlled.
(D) it cannot be used for positioning of work tables and tools in NC machines.
Ans: A

Q.6 The power factor of a squirrel cage induction motor is
(A) low at light load only.
(B) low at heavy load only.
(C) low at light and heavy load both.
(D) low at rated load only.
Ans:

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