As you are looking for question papers of ONGC Entrance Exam, so here I am providing sample question paper:

ONGC Sample Question Paper

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

Q. A narrow band amplifier has a band pass nearly…………of central frequency
a) 33.3% b) 10% c) 50%

Q. Phase shift oscillator consists
a) RL b) RC c) RLC

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

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

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

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

Q. Addition of indium in semiconductor crystal makes
a) PNP b) NPN

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

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

Q. Transistor that can be used in enhancement mode
a) NPN b) UJT c) JFET d) MOSFET

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

Q. High cutoff frequency
a) CB b) CC c) CE