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MCQOPTIONS
This section includes 9294 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 6251. |
Magnitude Plot of a Composite signal x(t) = e2jt + e3jt is |
| A. | half wave rectified sinusoidal |
| B. | full wave rectified sinusoidal |
| C. | exponentially increasing sinusoidal |
| D. | exponentially decreasing sinusoidal |
| Answer» C. exponentially increasing sinusoidal | |
| 6252. |
Transport lag usually exists in |
| A. | thermal systems |
| B. | hydraulic systems and thermal systems |
| C. | pneumatic systems |
| D. | thermal, hydraulic and pneumatic systems |
| Answer» E. | |
| 6253. |
If , the closed loop pole will be located at s = -12 when K = |
| A. | 4355 |
| B. | 5760 |
| C. | 9600 |
| D. | 9862 |
| Answer» C. 9600 | |
| 6254. |
The sensor generally used in incremental optical encoder is |
| A. | LED |
| B. | LCD |
| C. | photodiode |
| D. | either (a) or (b) |
| Answer» D. either (a) or (b) | |
| 6255. |
Robotic manipulator arms mostly use |
| A. | hydraulic actuator |
| B. | pneumatic actuator |
| C. | electric motor actuator |
| D. | none of the above |
| Answer» D. none of the above | |
| 6256. |
In terms of and n the settling time of a second order systems for 2% criterion and step input is equal to |
| A. | <img src="/_files/images/electronics-and-communication-engineering/automatic-control-systems/22-190-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/automatic-control-systems/22-190-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/automatic-control-systems/22-190-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/automatic-control-systems/22-190-4.png"> |
| Answer» E. | |
| 6257. |
The loop transfer function of a feedback system is . The number of asymptotes of its root loci are |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» E. | |
| 6258. |
Assertion (A): If minimum phase system has a gain margin of 8 dB and phase margin of 21 , the system is stable.Reason (R): For a minimum phase system both GM and PM must be positive for the system to be stable. |
| A. | Both A and R are correct and R is correct explanation of A |
| B. | Both A and R are correct but R is not correct explanation of A |
| C. | A is correct but R is wrong |
| D. | R is correct but A is wrong |
| Answer» B. Both A and R are correct but R is not correct explanation of A | |
| 6259. |
For type 1 system the velocity lag error is |
| A. | inversely proportional to bandwidth of system |
| B. | directly proportional to gain constant |
| C. | inversely proportional to gain constant |
| D. | independent of gain constant |
| Answer» D. independent of gain constant | |
| 6260. |
For as approaches infinity, the magnitude approaches zero and phase angle approaches - 90 . |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6261. |
In the given figure, the combinations of two non touching loops is |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 6262. |
For any test point s on the real axis, the sum of angular contributions of the complex conjugate poles is |
| A. | 90 |
| B. | 180 |
| C. | 270 |
| D. | 360 |
| Answer» E. | |
| 6263. |
For 0 < M < 1, the centres of M circle lie to the right of origin. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6264. |
The sampling of a function f(l) = sin 2pf0t starts from a zero crossing. The signal can be detected if sampling time T is |
| A. | <img src="/_files/images/electronics-and-communication-engineering/signals-and-systems/16-234-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/signals-and-systems/16-234-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/signals-and-systems/16-234-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/signals-and-systems/16-234-4.png"> |
| Answer» D. <img src="/_files/images/electronics-and-communication-engineering/signals-and-systems/16-234-4.png"> | |
| 6265. |
A receiver having an RF amplifier and an IF of 450 kHz, has Q of the coils 65 and an incoming frequency of 1200 kHz. The image rejection of the receiver is |
| A. | 5870 |
| B. | 3655 |
| C. | 236 |
| D. | 13.3 |
| Answer» D. 13.3 | |
| 6266. |
A phase lead network with where a < 1, gives maximum phase lead at a frequency equal to |
| A. | <img src="/_files/images/electronics-and-communication-engineering/automatic-control-systems/28-263-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/automatic-control-systems/28-263-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/automatic-control-systems/28-263-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/automatic-control-systems/28-263-4.png"> |
| Answer» D. <img src="/_files/images/electronics-and-communication-engineering/automatic-control-systems/28-263-4.png"> | |
| 6267. |
Consider the following systemsSystem I, System II, where C(s) is the output and R(s) is the input of these systems |
| A. | System I has larger bandwidth and faster speed of response than System II |
| B. | System II has larger bandwidth and faster speed of response than System I |
| C. | System I has larger bandwidth but System II has faster speed of response |
| D. | System II has larger bandwidth but System I has faster speed of response |
| Answer» B. System II has larger bandwidth and faster speed of response than System I | |
| 6268. |
Generally a servomotor operates at |
| A. | high torque and high speed |
| B. | low torque and low speed |
| C. | low torque and high speed |
| D. | high torque and low speed |
| Answer» D. high torque and low speed | |
| 6269. |
Which control action is also called rate control? |
| A. | Proportional |
| B. | Derivative |
| C. | Integral |
| D. | Proportional plus integral |
| Answer» C. Integral | |
| 6270. |
Examine the following statements Air and gases are compressible.Air, gases and some liquids are compressible.Oil can function as hydraulic fluid as well as lubricator. Which of the above statements are correct? |
| A. | 3 only |
| B. | 2 and 3 only |
| C. | 1 and 3 only |
| D. | 2 only |
| Answer» D. 2 only | |
| 6271. |
Lag compensation increases bandwidth of the system. |
| A. | True |
| B. | False |
| Answer» C. | |
| 6272. |
If the characteristic equation is ( + 1) ( + 2) ( + 3) = 0, the eigen values are |
| A. | -1, -2, -3 |
| B. | 1, 2, 3 |
| C. | 0, 1, 2 |
| D. | 0, 2, 3 |
| Answer» B. 1, 2, 3 | |
| 6273. |
If the poles lie in second quadrant, damping ratio is |
| A. | 1 |
| B. | less than 1 |
| C. | zero |
| D. | more than 1 |
| Answer» C. zero | |
| 6274. |
Lag compensation permits a high gain at low frequencies. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6275. |
Assertion (A): When performance specifications are given in term of transient response characteristics, root locus method is a suitable method.Reason (R): When performance specifications in terms of state variables are given, modern control methods can be used. |
| A. | Both A and R are correct and R is correct explanation of A |
| B. | Both A and R are correct but R is not correct explanation of A |
| C. | A is correct but R is wrong |
| D. | R is correct but A is wrong |
| Answer» C. A is correct but R is wrong | |
| 6276. |
Assertion (A): When the forward gain of a system is increased, the transient response becomes oscillatory.Reason (R): Increasing the forward gain reduces steady state error. |
| A. | Both A and R are correct and R is correct explanation of A |
| B. | Both A and R are correct but R is not correct explanation of A |
| C. | A is correct but R is wrong |
| D. | R is correct but A is wrong |
| Answer» B. Both A and R are correct but R is not correct explanation of A | |
| 6277. |
The given figure shows dB magnitude plots for type 0, type 1 and type 2 systems. Out of these |
| A. | curves 1, 2, 3 are for type 0, 1, 2 systems respectively |
| B. | curves 1, 2, 3 are for type 2, 1, 0 systems respectively |
| C. | curves 1, 2, 3 are for type 1, 0, 2 systems respectively |
| D. | curves 1, 2, 3 are for type 1, 2, 0 systems respectively |
| Answer» B. curves 1, 2, 3 are for type 2, 1, 0 systems respectively | |
| 6278. |
Assertion (A): A. For a unity feedback system, with , the settling time of step response is constant for all values of K 1Reason (R): The real part of the roots for all values of K 1 are negative. |
| A. | Both A and R are correct and R is correct explanation of A |
| B. | Both A and R are correct but R is not correct explanation of A |
| C. | A is correct but R is wrong |
| D. | R is correct but A is wrong |
| Answer» B. Both A and R are correct but R is not correct explanation of A | |
| 6279. |
Assertion (A): F(s) is valid throughout s plane except at poles of F(s).Reason (R): [f1(t) + f2(t)] = [f1(t)] + [f2(t)] |
| A. | Both A and R are correct and R is correct explanation of A |
| B. | Both A and R are correct but R is not correct explanation of A |
| C. | A is correct but R is wrong |
| D. | R is correct but A is wrong |
| Answer» C. A is correct but R is wrong | |
| 6280. |
Polar plot of a lag-lead compensator is a circle. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6281. |
For a type 0 system and unit ramp input, the steady state error is |
| A. | 0 |
| B. | |
| C. | 1 |
| D. | 1/K |
| E. | <i><sub>V</sub></i> |
| Answer» C. 1 | |
| 6282. |
For the mechanical system in the given figure the transfer function = |
| A. | <img src="/_files/images/electronics-and-communication-engineering/automatic-control-systems/24-208-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/automatic-control-systems/24-208-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/automatic-control-systems/24-208-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/automatic-control-systems/24-208-4.png"> |
| Answer» B. <img src="/_files/images/electronics-and-communication-engineering/automatic-control-systems/24-208-2.png"> | |
| 6283. |
The polar plot of the given figure can be for G(j ) = |
| A. | <img src="/_files/images/electronics-and-communication-engineering/automatic-control-systems/34-369-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/automatic-control-systems/34-369-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/automatic-control-systems/34-369-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/automatic-control-systems/34-369-4.png"> |
| Answer» C. <img src="/_files/images/electronics-and-communication-engineering/automatic-control-systems/34-369-3.png"> | |
| 6284. |
The distance of poles from origin depends on |
| A. | undamped natural frequency |
| B. | damping ratio |
| C. | both (a) and (b) |
| D. | neither (a) nor (b) |
| Answer» B. damping ratio | |
| 6285. |
In the field controlled motor the entire damping comes from |
| A. | armature resistance |
| B. | back emf |
| C. | motor friction and load |
| D. | field resistance |
| Answer» D. field resistance | |
| 6286. |
The complicated shapes in the polar plots are only due to time constants in the numerator of transfer functions. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6287. |
The overall transfer function for a unity feedback system is . Which of the following statements about this system are correct? Position error constant Kp is 4System is type 1Velocity error constant is finite Select the answer as per following code: |
| A. | 1, 2, 3 |
| B. | 1, 2 |
| C. | 2, 3 |
| D. | 1, 3 |
| Answer» E. | |
| 6288. |
Bandwidth is proportional to speed of response. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6289. |
For a quadratic factor in denominator of transfer function the phase angle at corner frequency (in Bode phase angle plot) |
| A. | is -90 |
| B. | is +90 |
| C. | depends on the damping factor |
| D. | none of the above |
| Answer» B. is +90 | |
| 6290. |
Consider the following statements about polar plots Addition of a non-zero pole to a transfer function results in further rotation of polar plot through an angle of - 90 as Addition of a pole at the origin to a transfer function rotates the polar plot at zero and infinite frequencies by a further angle of - 90 Of the above statements: |
| A. | Both are correct |
| B. | Both are wrong |
| C. | 1 is correct and 2 is wrong |
| D. | 2 is correct and 1 is wrong |
| Answer» B. Both are wrong | |
| 6291. |
Assertion (A): Nyquist stability criterion uses the number of encirclements around (-1 + j0) point in GH plane to determine stabilityReason (R): The (-1 + j0) point in the s plane lies in the Nyquist path. |
| A. | Both A and R are correct and R is correct explanation of A |
| B. | Both A and R are correct but R is not correct explanation of A |
| C. | A is correct but R is wrong |
| D. | R is correct but A is wrong |
| Answer» D. R is correct but A is wrong | |
| 6292. |
The relative stability of a system is given by |
| A. | gain margin alone |
| B. | phase margin alone |
| C. | both phase and gain margins |
| D. | either (a) or (b) |
| Answer» D. either (a) or (b) | |
| 6293. |
In a two phase servomotor the voltages applied to the two stator windings |
| A. | are equal in magnitude and are in phase |
| B. | are unequal in magnitude but are in phase |
| C. | are equal in magnitude but have a phase difference of 90 |
| D. | are unequal in magnitude and have a phase difference of 90 |
| Answer» E. | |
| 6294. |
The pole zero plot in the given figure is for |
| A. | non-minimum phase function |
| B. | minimum phase function |
| C. | all pass function |
| D. | either (a) or (b) |
| Answer» D. either (a) or (b) | |
| 6295. |
The phase angle characteristic in the given figure is for |
| A. | all pass function |
| B. | transport lag |
| C. | minimum phase function |
| D. | none of the above |
| Answer» C. minimum phase function | |
| 6296. |
Assertion (A): Industrial robots improve productivity.Reason (R): Robots can handle monotonous and complex jobs without error in operation. |
| A. | Both A and R are correct and R is correct explanation of A |
| B. | Both A and R are correct but R is not correct explanation of A |
| C. | A is correct but R is wrong |
| D. | R is correct but A is wrong |
| Answer» B. Both A and R are correct but R is not correct explanation of A | |
| 6297. |
The phase angle curve of G(j ) H(j ) is drawn by adding the phase angles of individual factors. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6298. |
Assertion (A): In simplifying block diagram the product of transfer functions in feed forward direction must remain the same.Reason (R): In simplifying block diagram the product of transfer functions around a closed loop must remain the same. |
| A. | Both A and R are correct and R is correct explanation of A |
| B. | Both A and R are correct but R is not correct explanation of A |
| C. | A is correct but R is wrong |
| D. | R is correct but A is wrong |
| Answer» C. A is correct but R is wrong | |
| 6299. |
Temperature is analogous to |
| A. | voltage |
| B. | flux |
| C. | charge |
| D. | none of the above |
| Answer» B. flux | |
| 6300. |
If the Nyquist plot encircles the (-1 + j0) point clockwise once or more number of times, the system is unstable. |
| A. | True |
| B. | False |
| Answer» B. False | |