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MCQOPTIONS
This section includes 646 Mcqs, each offering curated multiple-choice questions to sharpen your ENGINEERING SERVICES EXAMINATION (ESE) knowledge and support exam preparation. Choose a topic below to get started.
| 401. |
For the system with T(s) = 4/(s²+2s+4), the maximum resonance peak is |
| A. | 4 |
| B. | 4/3 |
| C. | 2 |
| D. | 2/3 |
| Answer» E. | |
| 402. |
The phase angle curve of G(jω) H(jω) can be drawn |
| A. | by adding the phase angle curves of individual factors |
| B. | by subtracting the phase angle curves of individual factors |
| C. | by multiplying the phase angle curves of individual factors |
| D. | by dividing the phase angle curves of individual factors |
| Answer» B. by subtracting the phase angle curves of individual factors | |
| 403. |
For the unity feed back system of the given figure, the closed loop transfer function is |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» B. B | |
| 404. |
Assertion (A): Inverse Laplace transform can be found from P(s) by inversion integral.Reason (R): The function f(t) is assumed to be zero for t < 0. |
| 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 | |
| 405. |
Nichol's chart is symmetric about - 180° axis. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | can't say |
| Answer» B. False | |
| 406. |
In a second order undamped system, the poles are on |
| A. | positive real axis |
| B. | imaginary axis |
| C. | negative real axis |
| D. | either (a) or (c) |
| Answer» C. negative real axis | |
| 407. |
The system in the given figure is |
| A. | type 0 system |
| B. | type 1 system |
| C. | type 2 system |
| D. | type 3 system |
| Answer» E. | |
| 408. |
A lag compensator provides attenuation in |
| A. | very low frequency range |
| B. | low frequency range |
| C. | high frequency range |
| D. | none of the above |
| Answer» D. none of the above | |
| 409. |
Consider the following statements1. The effect of feedback is to reduce system error2. Feedback increases the system gain at one frequency but reduces the system gain as another frequency3. Feedback can cause an originally stable system to become unstable Which of the above statements are correct? |
| A. | 1, 2, 3 |
| B. | 1, 2 |
| C. | 2, 3 |
| D. | 1, 3 |
| Answer» E. | |
| 410. |
The open loop transfer function of a unity feedback system is G(s) = 1/(s+2)². The poles of closed loop system are at |
| A. | -2, -2 |
| B. | -2, -1 |
| C. | - 2, ± j 1 |
| D. | - 2, 2 |
| Answer» D. - 2, 2 | |
| 411. |
For the transport lag G(jω) = e^(-jωT), the magnitude is always equal to |
| A. | 0 |
| B. | 1 |
| C. | 10 |
| D. | 0.5 |
| Answer» C. 10 | |
| 412. |
The system in the given figure |
| A. | will be unstable due to the presence of positive feedback in the inner loop |
| B. | may be stabilized by the negative feedback outer loop |
| C. | can never be stable |
| D. | will always be stable |
| Answer» C. can never be stable | |
| 413. |
The phase angle curve of G(jω) H(jω) is drawn by adding the phase angles of individual factors. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | can't say |
| Answer» B. False | |
| 414. |
For the given figure C(s)/R(s) |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» B. B | |
| 415. |
The resistance R of a liquid flow system is defined as |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» C. C | |
| 416. |
For op-amp circuit of the given figure, Eo(s)/Ei(s) = |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» E. | |
| 417. |
For quadratic factor given below, In Bode log magnitude plot the high frequency asymptote is a straight line having the slope |
| A. | -20 dB per decade |
| B. | +20 dB per decade |
| C. | -40 dB per decade |
| D. | +40 dB per decade |
| Answer» D. +40 dB per decade | |
| 418. |
For a first order system having transfer function 1/(1+sT), the unit ramp response is |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» C. C | |
| 419. |
In liquid flow system the capacitance of a water tank is defined as |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» B. B | |
| 420. |
For the system in the given figure, the characteristic equation is |
| A. | s² + s(3 + 6a) + 6 = 0 |
| B. | s² + s(3 + 12a) + 12 = 0 |
| C. | s² + 3s = 0 |
| D. | s² + 6s = 0 |
| Answer» B. s² + s(3 + 12a) + 12 = 0 | |
| 421. |
For the system in the given figure, the transfer function C(s)/R(s) is |
| A. | G1 + G2 + G3 |
| B. | G1 G2 + G3 |
| C. | G1 G2 G3 |
| D. | (G1 + G2) G3 |
| Answer» C. G1 G2 G3 | |
| 422. |
In the given figure the transfer function C(s)/N(s) = |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» E. | |
| 423. |
The transient response of a second order system is given by following equation. For 5% criterion the settling time is |
| A. | 0.25 sec |
| B. | 0.75 sec |
| C. | 1.25 sec |
| D. | 4 sec |
| Answer» C. 1.25 sec | |
| 424. |
For G(jω) = |
| A. | magnitude is 1 at all frequencies and phase angle varies from 0 to - 180° as ω varies from 0 to ∞ |
| B. | magnitude is T at all frequencies and phase angle 0 |
| C. | magnitude is (1 + ω²T²)^0.5 and phase angle varies from 0 to 0 - 180° as ω varies from 0 to ∞ |
| D. | none of the above |
| Answer» B. magnitude is T at all frequencies and phase angle 0 | |
| 425. |
For the given figure C(s)/R(s) = |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» D. D | |
| 426. |
The network of the given figure is a |
| A. | lag network |
| B. | lead network |
| C. | lag-lead network |
| D. | any of the above |
| Answer» C. lag-lead network | |
| 427. |
For the second order system having following differential equation (When θ0 and θi are output and input), the natural frequency is |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» B. B | |
| 428. |
For a second order system, the position of poles is in the shaded region shown in the given figure. The variation in damping factor is |
| A. | from 0 to 1 |
| B. | from about 0.3 to 0.7 |
| C. | from 1 to 5 |
| D. | from 0 to 3 |
| Answer» C. from 1 to 5 | |
| 429. |
The maximum shift which can be provided by a lead compensator with transfer function given below is |
| A. | 15° |
| B. | 30° |
| C. | 45° |
| D. | 60° |
| Answer» C. 45° | |
| 430. |
Assertion (A): In root locus the breakaway and break in points either lie on real axis or occur in complex conjugate pairs.Reason (R): All root locus asymptotes intersect on real axis. |
| 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 | |
| 431. |
In the given figure, the input frequency is such that R = XC. Then |
| A. | v0 lags vi by 45° |
| B. | v0 lags vi by 90° |
| C. | v0 leads vi by 45° |
| D. | v0 leads vi by 90° |
| Answer» B. v0 lags vi by 90° | |
| 432. |
For the given figure C(s)/R(s) |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» B. B | |
| 433. |
For the circuit in the given figure, V₀/Vi = |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» D. D | |
| 434. |
For a first order system having transfer function 1/(1+sT) , the unit impulse response is |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» D. D | |
| 435. |
For the given figure, C(s)/R(s) = |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» C. C | |
| 436. |
In the given figure x6 = |
| A. | de(ax1 + bx2 + cx3) |
| B. | (a + b + c) (x1 + x2 + x3) (d + e) |
| C. | (ax1 + bx2 + cx3) (d + e) |
| D. | a b c d e (x1 + x2 + x3) |
| Answer» B. (a + b + c) (x1 + x2 + x3) (d + e) | |
| 437. |
In the given figure the input is x(t) = A sin ωt. The steady state output y(t) = |
| A. | A sin (ωt + φ) where φ = tan¯¹ |G(jω)| |
| B. | |G(jω)| A sin [ωt + ∠G(jω)] |
| C. | |G(jω)| A sin [2ωt + ∠G(jω)] |
| D. | A G(jω) sin [ωt + ∠G(jω)] |
| Answer» C. |G(jω)| A sin [2ωt + ∠G(jω)] | |
| 438. |
For the control system in the given figure, the value of K for critical damping is |
| A. | 1 |
| B. | 5.125 |
| C. | 6.831 |
| D. | 10 |
| Answer» C. 6.831 | |
| 439. |
In the given figure, of potentiometer V0 = Vi (R0/Ri) only when |
| A. | RL = 0 |
| B. | RL = ∞ |
| C. | RL is neither low nor high |
| D. | RL is low but not zero |
| Answer» C. RL is neither low nor high | |
| 440. |
In the given figure the input frequency is such that R |
| A. | v0 lags vi by 90° |
| B. | v0 leads vi by 90° |
| C. | v0 and vi are in phase |
| D. | either (b) or (c) |
| Answer» B. v0 leads vi by 90° | |
| 441. |
If error voltage is e(t), integral square error = |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» C. C | |
| 442. |
The compensator of the given figure is a |
| A. | lag compensator |
| B. | lead compensator |
| C. | lag-lead compensator |
| D. | none of the above |
| Answer» C. lag-lead compensator | |
| 443. |
Consider the systems with following open loop transfer functions. If unity feedback is used, the increasing order of time taken for unit step response to settle is |
| A. | 1, 2, 3 |
| B. | 3, 1, 2 |
| C. | 2, 3, 1 |
| D. | 3, 2, 1 |
| Answer» D. 3, 2, 1 | |
| 444. |
A unity feedback system has open loop transfer function (2s+1)/s² . The closed loop transfer function is |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» C. C | |
| 445. |
In the given figure, C(s) = |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» C. C | |
| 446. |
For the given figure, time constant RC = t. Then Vo(s)/Vi(s) = |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» C. C | |
| 447. |
For very low frequencies, v0/vi in the given figure equals |
| A. | 1 |
| B. | 0 |
| C. | ∞ |
| D. | 0.5 |
| Answer» B. 0 | |
| 448. |
For the system of the given figure the transfer function is |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» E. | |
| 449. |
The first column of a Routh array is given below. How many roots of the corresponding characteristic equation are in left half s-plane? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» C. 4 | |
| 450. |
In the given figure, if R = XC, voltage gain is |
| A. | 0 dB |
| B. | 3 dB |
| C. | -3 dB |
| D. | 20 dB |
| Answer» D. 20 dB | |