

MCQOPTIONS
This section includes 51 Mcqs, each offering curated multiple-choice questions to sharpen your SRMJEEE knowledge and support exam preparation. Choose a topic below to get started.
1. |
_______ is a measure of the fraction of frame time which is used for the transmission of traffic |
A. | Preamble |
B. | Guard time |
C. | Frame efficiency |
D. | Decoding quenching |
Answer» D. Decoding quenching | |
2. |
In some phase detection systems, the phase detector must be allowed for some time to recover from one burst before the next burst is receiving by it. This waiting time is known as ____________ |
A. | Preamble |
B. | Guard time |
C. | Frame efficiency |
D. | Decoding quenching |
Answer» E. | |
3. |
__________ is necessary to prevent the bursts from overlapping. |
A. | Preamble |
B. | Guard time |
C. | Frame efficiency |
D. | Decoding quenching |
Answer» C. Frame efficiency | |
4. |
At the beginning of each burst, certain time slots are used to carry timing & synchronizing information , These time slots are collectively known as _________ |
A. | Preamble |
B. | Guard time |
C. | Frame efficiency |
D. | Decoding quenching |
Answer» B. Guard time | |
5. |
What is meant by TDMA ? |
A. | Time division modulation amplifier |
B. | Time division multiple amplifier |
C. | Time division multiple access |
D. | none of these |
Answer» D. none of these | |
6. |
What is meant by CDMA? |
A. | Code division modulation access |
B. | Code division multiple amplifier |
C. | Code division multiple access |
D. | none of these |
Answer» D. none of these | |
7. |
Which of the following comes under methods of multiple access techniques? |
A. | FDMA & TDMA |
B. | SCPC & CDMA |
C. | CDMA & GSM |
D. | none of these |
Answer» B. SCPC & CDMA | |
8. |
What is meant by OMT ? |
A. | Orthogonal mode tube |
B. | Orthogonal modulation tube |
C. | Orthogonal mode transducer |
D. | none of these |
Answer» D. none of these | |
9. |
What is meant by TWTA ? |
A. | Travelling wave travelling amplifier |
B. | Travelling wave tube amplifier |
C. | Tube wave travelling amplifier |
D. | None of these |
Answer» C. Tube wave travelling amplifier | |
10. |
__Which of the following term is used to describe the microwave radiation which is present throughout universe and appears to originate from matter in any form at a finite temperature. |
A. | Noise factor |
B. | Antenna loss |
C. | Sky noise |
D. | Noise power spectral density |
Answer» D. Noise power spectral density | |
11. |
Intermodulation distortion in high power amplifier can result in signal product which appear as noise and it is known as |
A. | Intermodulation distortion |
B. | Intermodulation noise |
C. | noise power spectral density |
D. | noise weightening |
Answer» C. noise power spectral density | |
12. |
Noise power per unit Bandwidth is known as |
A. | Noise power spectral density |
B. | Power spectral density |
C. | Auto spectral density |
D. | Energy spectral density |
Answer» B. Power spectral density | |
13. |
In which of the following, Overlap occurs between channels, but these are alternatively polarized left hand circular and right hand circular to reduce interference to acceptable levels. |
A. | S/N ratio |
B. | frequency reuse |
C. | Polarization Interleaving |
D. | none of these |
Answer» D. none of these | |
14. |
______ is the rotation of the vehicle about its vertical axis |
A. | Propellent |
B. | Transponder |
C. | Payload |
D. | Yaw |
Answer» E. | |
15. |
Which of the following refers to the equipment used to provide the service for which the satellite has been launched. |
A. | Payload |
B. | Transponder |
C. | Propellent |
D. | none of these |
Answer» B. Transponder | |
16. |
_____ system achieves and maintains the required attitudes, including main function maintaining accurate satellite position throughout the life span of the system. |
A. | Automatic control system |
B. | Manual control system |
C. | Attitude control system |
D. | none of these |
Answer» D. none of these | |
17. |
INTELSAT stands for ________ |
A. | International Telecommunications Satellite |
B. | India Telecommunications Satellite |
C. | Inter Telecommunications Satellite |
D. | None of the above |
Answer» B. India Telecommunications Satellite | |
18. |
The point where the orbit crosses the equatorial plane going from south to north is known as ________ |
A. | Ascending node |
B. | Descending node |
C. | Inclination |
D. | none of the above |
Answer» B. Descending node | |
19. |
The point farthest from the earth is defined as ______ |
A. | Apogee |
B. | perigee |
C. | line of apsides |
D. | none of the above |
Answer» B. perigee | |
20. |
___ law states that the square of the periodic time of orbit is perpendicular to the cube of the mean distance between the two bodies. A3 = 3/n2 |
A. | Newton’s 1st law |
B. | kepler’s first law |
C. | kepler’s second law |
D. | kepler’s third law |
Answer» E. | |
21. |
_____ law states that for equal time intervals, the satellite will sweep out equal areas in its orbital plane, focused at the barycenter. |
A. | Newton’s 1st law |
B. | kepler’s first law |
C. | kepler’s second law |
D. | kepler’s third law |
Answer» D. kepler’s third law | |
22. |
________ law states that the path followed by the satellite around the primary will be an ellipse. |
A. | Newton’s 1st law |
B. | kepler’s first law |
C. | kepler’s second law |
D. | kepler’s third law |
Answer» C. kepler’s second law | |
23. |
_____ is an artificial body that is projected from earth to orbit either earth (or) another body of solar systems. |
A. | Satellite |
B. | moon |
C. | sun |
D. | none of the above |
Answer» B. moon | |
24. |
An example of a discrete set of information/system is |
A. | the trajectory of the Sun |
B. | data on a CD |
C. | universe time scale |
D. | movement of water through a pipe |
Answer» C. universe time scale | |
25. |
The type of systems which are characterized by input and the output capable of taking any value in a particular set of values are called as |
A. | analog |
B. | discrete |
C. | digital |
D. | continuous |
Answer» E. | |
26. |
The type of systems which are characterized by input and the output quantized at certain levels are called as |
A. | analog |
B. | discrete |
C. | continuous |
D. | digital |
Answer» C. continuous | |
27. |
Find the Nyquist Frequency for the given signal x(t) =3 cos 50πt +10 sin 300πt – cos100πt |
A. | 50 Hz |
B. | 100 Hz |
C. | 200 Hz |
D. | 300 Hz |
Answer» E. | |
28. |
The continuous time system described by the equation y(t) = x(t2) comes under which category |
A. | causal, linear and time varying |
B. | causal, non-linear and time varying |
C. | non causal, non-linear and time-invariant |
D. | non causal, linear and time-variant |
Answer» E. | |
29. |
The Fourier transform of u(t) is B(jω) & the laplace transform of u(t ) is A(s), then which of the following equation is satisfied |
A. | B(jω) = A(s)|s=jω |
B. | A(s) = 1/s but B(jω) ≠ 1/jω |
C. | A(s) ≠ 1/s but B(jω) ≠ 1/jω |
D. | A(s) ≠ 1/s but B(jω) ≠ 1/jω |
Answer» C. A(s) ≠ 1/s but B(jω) ≠ 1/jω | |
30. |
Determine the Fourier transform of unit step x(t) = u(t) |
A. | 1/j ω |
B. | 1/2j ω |
C. | j ω |
D. | 2j ω |
Answer» B. 1/2j ω | |
31. |
A continuous-time periodic signal x(t), having a period T, is convolved with itself. Then the resulting signal is |
A. | Not Periodic |
B. | Periodic having a period 2T |
C. | Periodic having a period T |
D. | Periodic having a period T/2 |
Answer» D. Periodic having a period T/2 | |
32. |
For a band pass signal extends from 1 KHz to 2 KHz. Then the minimum sampling frequency that needed to retain all information of the sampled signal is |
A. | 1 KHz. |
B. | 2 KHz. |
C. | 3 KHz. |
D. | 4 KHz. |
Answer» C. 3 KHz. | |
33. |
The given system is characterized by the differential equation d2y(t)/dt2-dy(t)/dt-2y(t)= x(t). Then the system is: |
A. | Linear and stable |
B. | Linear and unstable |
C. | Nonlinear and unstable |
D. | Nonlinear and stable |
Answer» C. Nonlinear and unstable | |
34. |
The Parseval’s theorem states that the energy in the time-domain representation of a signal is equal to the energy in the frequency domain representation normalized by |
A. | 2π |
B. | π |
C. | π/2 |
D. | π/4 |
Answer» B. π | |
35. |
Which of the following is the one of the property of unit impulse δ(t) is |
A. | δ(at) = a δ(t) |
B. | δ(at) = δ(t) |
C. | δ(at) = 1/a δ(t) |
D. | δ(at) = [δ(t)]a |
Answer» D. δ(at) = [δ(t)]a | |
36. |
The equation y(t) = a x(t)+b comes under which system |
A. | Linear for any value of b |
B. | Linear if b > 0 |
C. | Linear if b < 0 |
D. | Non-linear |
Answer» E. | |
37. |
The difference between the highest and the lowest frequencies of a signal is known as |
A. | Frequency |
B. | Period |
C. | Bandwidth |
D. | Amplitude |
Answer» D. Amplitude | |
38. |
Nyquist bit rate formula defines the theoretical maximum bit rate for which channel |
A. | Noisy |
B. | Noiseless |
C. | Bandpass |
D. | Low-pass |
Answer» C. Bandpass | |
39. |
A system is defined as |
A. | Any combination of components or elements that has a useful function. |
B. | Any combination of elements that has a single input and a single output. |
C. | Any closed volume for which all the inputs and outputs are known. |
D. | Any physical quantity that varies with time,space or any other independent variable |
Answer» D. Any physical quantity that varies with time,space or any other independent variable | |
40. |
Which of the following can weaken a signal |
A. | Attenuation |
B. | Distortion |
C. | Noise |
D. | All of the above |
Answer» E. | |
41. |
Frequency and Time period are ______ |
A. | Proportional to each other |
B. | Inverse of each other |
C. | Same |
D. | None of the above |
Answer» C. Same | |
42. |
A system is said to be casual if the output of the system depends on the |
A. | Past & Present Inputs |
B. | Present Input |
C. | Future Input |
D. | Past & Future Inputs |
Answer» B. Present Input | |
43. |
A system is said to be stable if the bounded input to the system produces |
A. | Bounded output |
B. | Non bounded output |
C. | Inbound output |
D. | Outbound output |
Answer» B. Non bounded output | |
44. |
A system is said to be dynamic if the output of the system depends on the |
A. | Past Input |
B. | Future Input |
C. | Present Input |
D. | Present & Future Inputs |
Answer» B. Future Input | |
45. |
A discrete signal is said to be odd or asymmetric if x(-n) is equal to |
A. | X(n) |
B. | 0 |
C. | –x(-n) |
D. | ∞ |
Answer» D. ∞ | |
46. |
A signal is an energy signal when the signal has |
A. | Infinite energy |
B. | Finite energy |
C. | zero energy |
D. | None of the above |
Answer» C. zero energy | |
47. |
The function which relates output of a system to the input(signal) of a system is |
A. | Periodic function |
B. | Non-periodic function |
C. | Transfer function |
D. | None of the above |
Answer» D. None of the above | |
48. |
Which of the following time system operates with a continuous time signal & produces a continuous time output signal |
A. | Continuous time system |
B. | Discrete time system |
C. | Time invariant system |
D. | Time variant system |
Answer» B. Discrete time system | |
49. |
A signal is a power signal when the signal has |
A. | Infinite average power |
B. | finite average power |
C. | Zero average power |
D. | None Of The Above |
Answer» C. Zero average power | |
50. |
A discrete signal is said to be even or symmetric if x(-n) is equal to |
A. | X(n) |
B. | 0 |
C. | –x(n) |
D. | –x(-n) |
Answer» B. 0 | |