Instrumentation Quiz | 100 MCQ |1000 Student live Instrumentation quiz for Competition exam like-bpcl, iocl, railway je, sail etc. Welcome to TheInstrumentGuru.com Thanks for choosing self assessment Quiz. Check Your Ability in given 100 Questions. Result will show after submission of quiz. DATE:-March 27, 2026 1. Garampani sanctuary is located at Diphu, Assam Kohima, Nagaland Junagarh, Gujarat Gangtok, Sikkim 2. Which of the following national parks is not listed in a UNESCO World Heritage site? Kanha Sundarbans Keoladeo Kaziranga 3. A semiconductor has………… temperature coefficient of resistance. None of the above Zero Positive Negative 4. A trivalent impurity has…..valence electrons 6 3 4 5 5. A system is said to be dened as non causal, when the output at the present does not depend on the factor of time at all the output at the present depends on the input at a time instant in the future the output at the present depends on the input at the current time the output at the present depends on the input at an earlier time 6. The resistivity of a pure silicon is about…………… 3x105Om 6x10-8Ocm 100Ocm 6000Ocm 7. Under which conditions does an initially relaxed system become unstable ? only if unbounded input generates unbounded output only if bounded input generates bounded output only if unbounded input generates bounded output only if bounded input generates unbounded output 8. Reactance bipolar transistor the radiation at right angles is zero the radiation is zero in all directions the radiation at right angles is zero the radiation is maximum in all directions 9. Unilateral Laplace Transform is applicable for the determination of linear constant coecient dierential equations with ________ Zero nal condition Non-zero initial condition Zero initial condition Non-zero nal condition 10. If output power of a radio receiver is doubled, its volume is increased by __________ dB. -3 3 1 2 11. A signal g(t) = A then g(t) is a neither energy nor power signal power signal energy signal insucient data 12. The random motion of holes and free electrons due to thermal agitation is called ………. Diffusion Pressure Ionisation None of the above 13. Which of the following personalities gave ‘The Laws of Heredity’? William Harvey G.J. Mendel Charles Darwin Robert Hook 14. Themost commonlyused semiconductoris……….. Silicon Carbon Sulphur Germanium 15. A time invariant system is a system whose output remains same with a delay in input increases with a delay in input decreases with a delay in input vanishes with a delay in input 16. By which of the following the control action is determined when a man walks along a path ? Brain Legs Eyes Hands 17. For a low level AM system, the amplifiers modulated stage must be harmonic devices non-linear devices class C amplifiers linear devices 18. Commercial Frequency deviation of FM is 70 kHz 80 kHz 65 kHz 75 kHz 19. Which of the following should be done to make an unstable system stable ? The gain of the system should be decreased The gain of the system should be increased The number of poles to the loop transfer function should be increased The number of zeros to the loop transfer function should be increased 20. Which of the following devices are commonly used as error detectors in instruments ? Microsyns Vernistats Any of the above Resolvers 21. The frequency range of 300 kHz to 3000 kHz is known as low frequency high frequency very high frequency medium frequency 22. A hole and electron in close proximity would tend to ………. Repel each other Have no effect on each other None of the above Attract each other 23. Any externally introduced signal affecting the controlled output is called a feedback gain control stimulus signal 24. Which of the following statements is not necessarily correct for open control system ? Presence of non-linearities causes malfunctioning Less expensive Input command is the sole factor responsible for providing the control action Generally free from problems of non-linearities 25. A pentavalent impurity has……….Valence electrons 5 3 4 6 26. The sine function is defined as ratio of side lengths, Opposite divided by adjacent Hypotenuse divided by adjacent Opposite divided by hypotenuse Adjacent divided by hypotenuse 27. Which property of fourier transform gives rise to an additional phase shift of -2? ftd for the generated time delay in the communication Time Scaling Time Shifting Duality Linearity 28. To eliminate ghosts in the picture connect a booster twist the transmission line use a longer transmission line change the antenna orientation of location 29. When a pentavalent impurity is added to a pure semiconductor,it becomes…… n-type semiconductor An insulator An intrinsic semiconductor p-type semiconductor 30. A control system in which the control action is somehow dependent on the output is known as Open system Semi closed loop system Closed loop system None of the above 31. Which of the following statements is correct? Convex lens has negative focal power and concave lens have positive focal power Convex lens has positive focal power and concave lens have negative focal power All lens have positive focal power All lens have negative focal power 32. As the doping to a pure semiconductor increases,the bulk resistance of the semiconductor……….. Increases Remains the same Decreases None of theabove 33. In an open loop control system None of the above Only system parameters have effect on the control output Output is independent of control input Output is dependent on control input 34. The impurity level in an extrinsic semiconductor is about…..of pure semiconductor. 1 atom for 108 atoms 1 atom for 104 atoms 10 atoms for 108 atoms 1 atom for 100 atoms 35. The initial response when tne output is not equal to input is called Either of the above Error response Dynamic response Transient response 36. A good control system has all the following features except good stability good accuracy good stability sufficient power handling capacity 37. In Modulation, “carrier” is voltage for which frequency, phase or amplitude is varied voltage with constant frequency, phase or amplitude resultant wave speech voltage to be transmitted 38. In closed loop control system, with positive value of feedback gain the overall gain of the system will decrease any of the above increase be unaffected 39. Which among the following operations is/are not involved /associated with the computation process of linear convolution? Integration Operation Shifting Operation Folding Operation Multiplication Operation 40. A semiconductor has generally……………… valence electrons. 3 2 4 6 41. Which property of periodic signal in DTFS gets completely claried /identied by the equation x (n – n0 )? Frequency Shifting Conjugation Time Shifting Time Reversal 42. Circular polarization is useful in discrimination between reception of adjacent beams is useful in reducing depolarization effect on received wave none of the above involves critical alignment of transmitting and receiving antenna 43. In Pulse Code Modulation system large bandwidth is required quantising noise can be overcome by companding quantising noise can be reduced by decreasing the number of standard levels suffers from the disadvantage of its incompatibly with TDM 44. What is the nature of Fourier representation of a discrete & aperiodic signal? Continuous & aperiodic Continuous & periodic Discrete & periodic Continuous & periodic 45. Who is known as “The Saint of Gutters”? Mother Teresa Anna Hazare None of these Baba Amte 46. A woofer should be fed from the input through a high pass filter band stop filter band pass filter low pass filter 47. Complex numbers are used in AC circuit analysis primarily to represent: Amplitude and phase shift Frequency Power Bandwidth and harmonic content 48. FFC stands for None of the above forest film company Foreign Finance Corporation Film Finance Corporation 49. Which crop is sown on the largest area in India? Rice Wheat Maize Sugarcane 50. Which of the following is an open loop control system ? Stroboscope Field controlled D.C. motor Ward leonard control Metadyne 51. .... is a part of the human temperature control system. Perspiration system Digestive system Leg movement Ear 52. When a pure semiconductor is heated,its resistance ………….. Remains the same Goes down Can’t say Goes up 53. A control system working under unknown random actions is called computer control system digital data system stochastic control system adaptive control system 54. For open control system which of the following statements is incorrect ? Less expensive Construction is simple and maintenance easy Errors are caused by disturbances Recalibration is not required for maintaining the required quality of the output 55. A closed loop system is distinguished from open loop system by which of the following ? Servo mechanism Feedback Input pattern Output pattern 56. Addition of trivalent impurity to a semiconductor creates many…….. Bound electrons Valence electrons Free electrons Holes 57. Has tendency to oscillate. Open loop system Both (a) and (b) Neither (a) nor (b) Closed loop system 58. Eritrea, which became the 182nd member of the United Nations in 1993, is on the continent of Asia Africa Europe Australia 59. Solve for both x and y in this simultaneous system of equations: x + 3y = −1, 4x−y = 9 x = 1 ; y = 2 x = 2 ; y = -1 x = 2 ; y = 1 x = -2 ; y = 1 60. Double integration of a unit step function would lead to a doublet a parabola an impulse a ramp 61. For attenuation of high frequencies we should use resistance shunt capacitance inductance series capacitance 62. .... is a closed loop system. Direct current generator Auto-pilot for an aircraft Electric switch Car starter 63. Grand Central Terminal, Park Avenue, New York is the world’s largest railway station None of the above longest railway station highest railway station 64. Name the person who was also known as Deshbandhu. Chittaranjan Das S. Radhakrishnan Madan Mohan Malviya G.K. Gokhale 65. The strength of a semiconductor crystal comes from …….. Forces between protons Forces between nuclei None of the above Electron-pair bonds 66. For telegraphy the most commonly used modulation system is two tone modulation PCM FSK single tone modulation 67. A system which is linear is said to obey the rules of homogeneity both scaling and additivity additivity scaling 68. Duality Theorem / Property of Fourier Transform states that _________ Shape of signal in time domain & shape of spectrum can never be interchangeable Shape of signal in time domain & shape of spectrum can be interchangeable Shape of signal in frequency domain & shape of spectrum can be interchangeable 69. Convert an angle of 75 degrees into radians: 1.571 radians 1.178 radians 1.309 radians 0.7854 radians 70. VSB modulation is preferred in TV because it reduces the bandwidth requirement to half it results in better reception none of the above it avoids phase distortion at low frequencies 71. Two rectangular waveforms of duration t1 and t2 seconds are convolved. What is the shape of the resulting waveform? Triangular Rectangular Semi-circular Trapezoidal 72. A hole in a semiconductor is defined as……………. A free electron free neutron The incomplete part of an electron pair bond A free proton 73. An automatic toaster is a ______ loop control system. any of the above closed open partially closed 74. A cordless telephone using separate frequencies for transmission in base and portable units is known as either (a) or (b) half duplex arrangement duplex arrangement neither (a) nor (b) 75. Manipulate the following equation to solve for x: x = aby x = y/ab x = a/by x = ay/b 76. Which of the following is an indirect way of generating FM? Reactance bipolar transistor Varactor diode modulator Armstrong modulator Reactance FET modulator 77. An FM radio receiver which is tuned to a 91.6 MHz broadcast station may receive an image frequency of __________ MHz. 80.9 70.2 102.3 113 78. An n-type semiconductor is……… Electrically neutral None of the above Negatively charged Positively charged 79. Addition of pentavalent impurity to a semiconductor creates many…….. Holes Free electrons Valence electrons Bound electrons 80. As per time displacement theorem in Laplace transformation, displacement in the time domain by T becomes division by s in the s domain division by e-sT in the s domain multiplication by s in the s domain multiplication by e-sT in the s domain 81. Which of the following ratios is equivalent to the ratio 25:300 ? 17:5 15:4 15:1 1:12 82. Positive logic in a logic circuit is one in which logic 0 voltage level is higher than logic 1 voltage level logic0 and,-1 are represented by negative and positive voltages respectively logic0 and 1 are represented by 0and positive voltage respectively logicvoltage level is lower than logic1 voltage level 83. If the cosine of angle θ is equal to 0.5, and the length of the opposite side is 20 meters, calculate the length of the hypotenuse. 40 meters 20.01 meters 17.32 meters 23.09 meters 84. The Fourier series of an odd periodic function contains even harmonics only sine harmonics only odd harmonics only cosine harmonics only 85. The colour of an object is decided by the reflected colour reflected colour for opaque object and wavelength transmitted through it for transparent objects the wavelength transmitted through it none of the above 86. Which among the following belongs to the category of non-recursive systems? Non-causal IIR Systems Causal FIR Systems Non-causal FIR Systems Causal IIR Systems 87. Factor the following polynomial expression: x2 −x−12 (x + 4)(x−3) (x + 1)(x−12) (x + 3)(x−4) (x + 2)(x−6) 88. A car is running at a constant speed of 50 km/h, which of the following is the feedback element for the driver ? Steering wheel Clutch Eyes Needle of the speedometer 89. Manipulate the following equation to solve for x: a = √bx2 x =(a/b) 2 x = √ab x = a/√b x = a2/b 90. Damped sinusoids are _____ sinusoid signals divided by decaying exponentials sinusoid signals divided by growing exponentials sinusoid signals multiplied by decaying exponentials sinusoid signals multiplied by growing exponentials 91. Which of the following does not cause losses in optical fiber cables? Stepped index operation Micro bending Attenuation in glass Impurities 92. In a semiconductor,current conduction is due to …….. Only holes Holes and free electrons Only free electrons None of the above 93. A modem is classified as low speed if data rate handled is upto 600 bps upto 400 bps upto 250 bps upto 100 bps 94. Which type of system response to its input represents the zero value of its initial condition? Zero input response Zero state response Total response Natural response 95. The resistivity of pure germanium under standard conditionsis about………. 6x10-4 Ocm 60 Ocm 3x106 Ocm 6x104 Ocm 96. A semiconductor is formed by……… bonds. Covalent None of the above Co-ordinate Electrovalent 97. Calculate 27% of 340. 91.8 81.0 12.6 88.8 98. All causal systems must have the component of time invariance memory stability linearity 99. The signal dened by the equations f(t) = 0 for t < 0, f(t) = E for 0 ? t ? a and f(t) = 0 for t > a is a shifted step function originating at t = a unit step function a pulse function a step function 100. In open loop system the control action is independent of the output the control action depends on the size of the system the control action depends on system variables the control action depends on the input signal Time's up
