Sir I am looking for the Oil and Natural Gas Corporation Limited ONGC exam paper for the Electronics and Communication so can you please provide me the same

Hey buddy the Oil and Natural Gas Corporation Limited is an Indian multinational oil and gas company headquartered in Dehradun, Uttarakhand, India.

ONGC Electronics Paper

1 . Two coils in differential connection have self-inductance of 2 mH and 4 mH and a mutual inductance of
0.15 mH. The equivalent inductance of the combination is
A. 5.7 mH
B. 5.85 mH
C. 6 mH
D. 6.15 mH.
2. Two point charges Q and -Q are located on two opposite corners of a square as shown in figure. If the
potential at the corner A is taken as 1V, then the potential at B, the centre of the square will be
1. zero
2.
3. 1V
4.
3. Optocouplers combine
A. SITs and BJTs
B. IGBTs and MOSFETS
C. Power transformers and silicon transistor
D. Infrared light-emitting diode and a silicon phototransistor
4. The difference between the indicated value and the true value of a quantity is known as
A. Gross error
B. Absolute error
C. Dynamic error
D. Relative error
5. The principles of homogeneity and super-position are applied to :
A. linear time variant sy stems
B. non-linear time variant sy stems
C. linear time invariant sy stems
D. non-linear time invariant sy stems.
6. In a 8085 microprocessor sy stem with memory mapped I / 0,
A. I / 0 devices have 8-bit addresses
B. I / 0 devices are accessed using IN and OUT instructions
C. there can be a maximum of 256 input devices and 256 output devices.
D. arithmetic and logic operations can be directly performed with the I / 0 data.
7 . The transistor shown in figure below, is biased

ONGC Electronics paper
7 . The transistor shown in figure below, is biased
1. at cut-off
2. at saturation
3. well into saturation
4. well into cut-off
8. In any transmitting antenna sy stem, efficiency primarily depends upon
A. ohmic losses of v arious conductors
B. radiation resistance
C. ground conductiv ity
D. atmospheric conditions.
9. An instruction used to set the carry Flag in a computer can be classified as
A. data transfer
B. arithmetic
C. logical
D. program control
1 0. The binary representation of 5.37 5 is
A. 1 1 1 .1 01 1
B. 1 01 .1 1 01
C. 1 01 .01 1
D. 1 1 1 .001
1 1 . Dislocations in materials are
A. point defect
B. line defect
C. planer defect
D. surface defects.
1 2. In TV sy stem, v ertical pulses are separated out from horizontal pulses by the use of
A. integrator
B. differentiator
C. sweep credit
D. sy nc separator.
1 3. Frequency in the UHF range propagate by means of
A. Ground wav es
B. Sky wav es
C. Surface wav es
D. Space wav es.
1 4. 200 MHz may be classified as
A. VHF
B. SHF
C. UHF
D. EHF
1 5. A communication satellite is a repeater between
A. a transmitting station and a receiv ing station
B. a transmitting station and many receiv ing stations
C. many transmitting stations and many receiv ing stations
D. none of the abov e
1 6. The power in a series R-L-C circuit will be half of that at resonance when the magnitude of the current is
equal to
A. V / 2R
B. V /
C. V /
D.
1 7 . A point charge Q is located on the surface of a sphere of radius R as shown in the figure. The av erage
electric field on the surface of the sphere will be
1. infinite
2.
3.
4. Zero
1 8. The efficiency of a chopper can be ex pected in the range
A. 50 to 55 percent
B. 65 to 7 2 percent
C. 82 to 87 percent
D. 92 to 99 percent
1 9. Which one out of the following instruments should be used to measure 600 kV a.c. v oltages?
A. Hot wire instrument
B. Electrostatic v oltmeter
C. Mov ing coil v oltmeter
D. Mov ing iron v oltmeter.
20.
Which one of the following transfer functions represents the Bode plot shown in the abov e figure :
1.
2.
3.
4.
21 . The following programme is run on an 8085 microprocessor,
Memory address in Hex Instruction
2000 LXI SP, 1 000
2003 PUSH H
2004 PUSH D
2005 CALL 2050
2008 POP 2050
2009 HIT
As the completion of ex ecution of the program, the program the program counter of the 8085 contains ………,
and the stack pointer contains ……..
1. 2050, OFFC
2. 2251 , OFFC
3. 1 025, OCCF
4. 1 025, OCCF
22. With reference to figure, v alue of VCE is
1. 0 V
2. 5 V
3. -5V
4. none of the abov e
23. The smallest change in sound intensity that can be detected
A. 1 dB
B. 3 dB
C. 1 0 dB
D. 20 dB.
24. In a generic microprocessor, instruction cy cle time is
A. shorter than machine cy cle time
B. larger than machine cy cle time
C. ex actly double the machine cy cle time
D. ex actly the same as the machine cy cle time
25. The v alue of M in the end will be
Do 1 00 I = 1 , 2
DO 200 J = 1 , 2
M = M + I + J
200 CONTINUE
1 00 CONTINUE
STOP
END
1. 1 0
2. 1 1
3. 1 2
4. 1 4
26. Resistiv ity of electrical conductors is most affected by
A. temperature
B. pressure
C. composition
D. all of the abov e.
27 . In CCIR B-sy stem of TV, blanking pulse is placed during
A. equalizing pulse
B. retrace interv al between each line
C. retrace period of v ertical line
D. none of the abov e.
28. The polarization required in ground wav e propagation is
A. Horizontal (linear)
B. v ertical (linear)
C. Circular
D. Elliptical
29. Multicav ity Kly stron
A. is not a microwav e dev ice
B. is not a good low lev el amplifier because of noise
C. is not suitable to pulse operation
D. has a high repeller v oltage to insure small transit time
30. Transponder comprises of
A. Transmitter
B. Receiv er
C. Antenna
D. a, b, c combined
31 . Consider the following statements regarding the circuit shown in the giv en figure :
1 . If the switch K is closed at a proper instant there will be no transient
2. The instant at which K is closed such that the transient is zero depends on the frequency of the supply
3. The instant at which K is closed such that the transient is zero depends on the circuit elements
4. There will alway s be a non-zero transient after the switch K is colosed.
Of these statements :
1. 1 alone is correct.
2. 1 and 2 are correct.
3. 1 and 3 are correct
4. 4 alone is correct.
32. A circular ring carry ing a uniformly distributed charge Q and a point charges -Q on the ax is of the ring
are shown in the fig. The magnitude of the dipole moment of the charge sy stem is
1. Qd
2. Q R2 / d
3. Q
4. QR.
33. Which of the following regulator prov ides output v oltage polarity rev ersal without a transformer
A. Buck regulator
B. Boost regulator
C. Buck-boost regulator
D. Cuk regulator
34. The deflection of hot wire instrument depends on
A. RMS v alue of alternating current
B. v oltage
C. av erage v alue of a.c. current
D. instantaneous v alue of a.c. current.
35. Match List-I with List-II and select the correct answer using the codes giv en below the Lists :
List-I List-II
(Response to a unit step input) (Location of poles in the s-plane)
1. 1 .One at the origin
B. 2.Two identical roots on the negativ e real ax is.
C. 3.Two on the imaginary ax is
D. 4.One on the position real ax is.
Codes:
A B C D
A. 4 3 2 1
B. 3 4 1 2
C. 3 4 2 1
D. 4 3 2 1
36. Dual slope integration ty pe Analog-to-Digital conv erters prov ide
A. higher speeds compared to all other ty pes of A / D conv erters
B. v ery good accuracy without putting ex treme requirements on component stability
C. poor rejection of power supply hums
D. better resolution compared to all other ty pes of A / D conv erters for the same number
of bits.
37 . In the figure giv en below, the collector current is
2 mA
200 mA
Almost zero
0.02 mA
38. The frequency modulated (FM) radio frequency range is nearly
A. 250 - 300 MHz
B. 1 50 - 200 MHz
C. 90 - 1 05 MHz
D. 30 - 7 0 MHz
39. A 32 bit microprocessor has the word length equal to
A. 2 by tes
B. 1 by te
C. 4 by tes
D. 8 by tes
40. In electronic microcircuits, a resistor may be fabricated from constant-thickness lay er of
semiconductor material with conductor connections at the edges as shown below. If the resistor shown has
resistance R, then a similar resistor 0.2 millimeter has a resistance of
4 R
2 R
R
R / 2
41 . Line imperfection in a cry stal is called
A. Schottky defect
B. Frenkel defect
C. edge dislocation
D. Miller defect.
42. The function of diplex er bridge in a TV transmitter is
A. to prev ent the loading of sev eral transmitters by v ideo transmitter
B. to increase the bandwidth
C. to increase the power output
D. to increase the efficiency of transmission.
43. Sometimes microwav e signals follow the earth’s curv ature. This due to
A. Ionospheric reflection
B. Faraday rotation
C. Ducting
D. Ionospheric scatter.
44. The modes in a reflex Kly stron
A. giv e the same frequency but different transit time
B. result from ex cessiv e transit time across the resonator gap
C. are caused by spurious frequency modulation
D. are just for theoretical considerations.
45. The capacity of a channel is
A. number of digits used in coding
B. v olume of information it can take
C. max imum rate of information transmission
D. bandwidth required for information

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