MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 233 Mcqs, each offering curated multiple-choice questions to sharpen your Control Systems knowledge and support exam preparation. Choose a topic below to get started.
| 201. |
Creep of rails can be checked by using |
| A. | Chairs |
| B. | Bearing plates |
| C. | Spikes |
| D. | Anchors |
| Answer» E. | |
| 202. |
For a Broad Gauge route with N+7 sleeper density, the number of sleepers per rail length is: |
| A. | 18 |
| B. | 19 |
| C. | 20 |
| D. | 21 |
| Answer» D. 21 | |
| 203. |
Consider the following statements concerning railways:1. A level stretch equal to the maximum train length is to be provided between the gradient reaches where a rising gradient is followed by a falling gradient.2. Vertical curves in railway tracks are not set out as parabolas.3. Diamond crossings can be laid on curves also.4. Curves should be avoided at the top level segment of bridges.Which of the above statements are correct? |
| A. | 1 and 3 only |
| B. | 2 and 3 only |
| C. | 1 and 4 only |
| D. | 2 and 4 only |
| Answer» B. 2 and 3 only | |
| 204. |
Number of fish bolts per fish plate is |
| A. | 2 |
| B. | 4 |
| C. | 5 |
| D. | 6 |
| Answer» C. 5 | |
| 205. |
Maximum allowable grades are lower for railways than for highways. The reason is: |
| A. | Steel wheel on steel rails have greater frictional co-efficient than rubber tyres on pavements |
| B. | Steel wheel on steel rails have lower frictional co-efficient than rubber tyres on pavements |
| C. | High grade causes discomfort to passengers |
| D. | Trains are longer than vehicles on highways |
| Answer» C. High grade causes discomfort to passengers | |
| 206. |
Match section - I with section II and select the correct answer using the codes given below:Section I (Alignment)Section II (Topography)A. Zig – zag alignmentI. Sags and summits in successionB. Cross country alignmentII. One slope of valleyC. Switch back developmentIII. A slope with deep valleysD.Valley alignmentIV. One steep regular slope |
| A. | (A) - (III), (B) - (I), (C) - (IV), (D) - (II) |
| B. | (A) - (I), (B) - (II), (C) - (III), (D) - (IV) |
| C. | (A) - (III), (B) - (I), (C) - (II), (D) - (IV) |
| D. | (A) - (I), (B) - (II), (C) - (IV), (D) - (III) |
| Answer» B. (A) - (I), (B) - (II), (C) - (III), (D) - (IV) | |
| 207. |
The open loop transfer function of a plant is given as, G(s) =1/s^2-1. If the plant is operated in unity feedback configuration, then the lead compensator that can stabilize the control system is: |
| A. | 10(s-1)/(s+2) |
| B. | 10(s+4)/(s+2) |
| C. | 10(s+2)/(s+10) |
| D. | 10(s+2)/(s+10) |
| Answer» B. 10(s+4)/(s+2) | |
| 208. |
Rate compensation : |
| A. | Increases bandwidth |
| B. | Attenuation |
| C. | Increases damping factor |
| D. | Second order |
| Answer» D. Second order | |
| 209. |
Lag compensator reduces__________ |
| A. | Position constant |
| B. | Velocity constant |
| C. | Position variable |
| D. | Acceleration constant |
| Answer» C. Position variable | |
| 210. |
Consider the following systems:System 1: G(s) =1/ (2s+1) and System 2: G(s) =1/ (5s+1)The true statement regarding the system is: |
| A. | Bandwidth of the system 1 is greater than the bandwidth of the system 2 |
| B. | Bandwidth of the system 1 is lower than the bandwidth of the system 2 |
| C. | Bandwidth of both the systems are same |
| D. | Bandwidth of both the systems are infinite |
| Answer» B. Bandwidth of the system 1 is lower than the bandwidth of the system 2 | |
| 211. |
The compensator for the system can be: |
| A. | Electrical |
| B. | Mechanical |
| C. | Hydraulic |
| D. | All of the mentioned |
| Answer» E. | |
| 212. |
Operations performed by hydraulic controllers: |
| A. | Flexible operations |
| B. | High torque high speed operations |
| C. | Fire and explosion proof operation |
| D. | All of the mentioned |
| Answer» C. Fire and explosion proof operation | |
| 213. |
Which terminology deals with the excitation or stimulus applied to the system from an external source for the generation of an output? |
| A. | Input signal |
| B. | Output signal |
| C. | Error signal |
| D. | Feedback signal |
| Answer» B. Output signal | |
| 214. |
Operations performed by electronic controllers: |
| A. | Flexible operations |
| B. | High torque high speed operations |
| C. | Fire and explosion proof operation |
| D. | All of the mentioned |
| Answer» B. High torque high speed operations | |
| 215. |
Lead compensator speeds up the transient response and increases the margin of stability of a system. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 216. |
Derivative error compensation: |
| A. | Improvement in transient response |
| B. | Reduction in steady state error |
| C. | Reduction is settling time |
| D. | Increase in damping constant |
| Answer» E. | |
| 217. |
Response to error is very fast for integral controller. |
| A. | True |
| B. | False |
| Answer» C. | |
| 218. |
Lag-lead compensation is a: |
| A. | Increases bandwidth |
| B. | Attenuation |
| C. | Increases damping factor |
| D. | Second order |
| Answer» E. | |
| 219. |
The most important consideration for designing of control system are: |
| A. | Transient response measures |
| B. | Steady state error |
| C. | Temporary response |
| D. | Final response |
| Answer» D. Final response | |
| 220. |
PID controller: |
| A. | Decreases steady state error and improves stability |
| B. | Rise time decreases |
| C. | Transient response becomes poorer |
| D. | Increases steady state error |
| Answer» B. Rise time decreases | |
| 221. |
A composite R-C network yielded the following transfer function when calculated from its components:T(s) = 1+21s+20s2/1+11s+10s2. This network can be used as which one of the following? |
| A. | Phase lead compensator |
| B. | Phase lag compensator |
| C. | Lag lead compensator |
| D. | None of the mentioned |
| Answer» B. Phase lag compensator | |
| 222. |
A phase lead compensation leads to: |
| A. | Increase in overshoot |
| B. | Reduction in bandwidth of closed loop system |
| C. | Reduction in rise time of closed loop system |
| D. | Reduction in gain margin |
| Answer» D. Reduction in gain margin | |
| 223. |
PI controller: |
| A. | Decreases steady state error and improves stability |
| B. | Rise time decreases |
| C. | Transient response becomes poorer |
| D. | Increases steady state error |
| Answer» D. Increases steady state error | |
| 224. |
PD controller is used to compensate a system, Compared to the uncompensated system, the compensated system has: |
| A. | A higher type number |
| B. | Reduced damping |
| C. | Higher noise amplification |
| D. | Large transient overshoot |
| Answer» D. Large transient overshoot | |
| 225. |
Which of the statement is correct with regard to the bandwidth of the control loop system: |
| A. | In systems where the low frequency magnitude in 0 dB on the bode diagram, the bandwidth is measured at the -3 dB frequency |
| B. | The bandwidth is the measurement of the accuracy of the closed loop system |
| C. | The stability is proportional to the bandwidth |
| D. | The system with larger bandwidth provides slower step response and lower fidelity ramp response |
| Answer» B. The bandwidth is the measurement of the accuracy of the closed loop system | |
| 226. |
Insertion of negative feedback in control system affects: |
| A. | The transient response to vanish uniformly |
| B. | The transient response to decay very fast |
| C. | No change in transient response |
| D. | The transient response decays at slow rate |
| Answer» C. No change in transient response | |
| 227. |
The compensator transfer function can be placed in: |
| A. | Cascade or series compensation |
| B. | Feedback or parallel compensation |
| C. | Positive |
| D. | Negative |
| Answer» D. Negative | |
| 228. |
Rate mode controller is also known as ______________ controller mode. |
| A. | Anticpatory |
| B. | Delay |
| C. | Integral |
| D. | Derivative |
| Answer» B. Delay | |
| 229. |
Lead compensation leads to: |
| A. | Increases bandwidth |
| B. | Attenuation |
| C. | Increases damping factor |
| D. | Second order |
| Answer» B. Attenuation | |
| 230. |
Consider the following statements:1. Integral controller improves steady state response2. By use of proportional controller, maximum peak overshoot decreases3. Type and order of system reduces by one for derivative controller4. Integral controller makes the system less stable in transient state due to oscillationsSelect the correct answer using the codes given below: |
| A. | 1,3 and 4 |
| B. | 1,2 and 3 |
| C. | 2.3 and 4 |
| D. | 1,2 and 4 |
| Answer» B. 1,2 and 3 | |
| 231. |
Open loop system is ___________ stable than closed loop system |
| A. | More |
| B. | Less |
| C. | Inclined |
| D. | Exponential |
| Answer» B. Less | |
| 232. |
Negative exponential term in the equation of the transfer function causes the transportation lag. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 233. |
Lead compensator increases bandwidth |
| A. | True |
| B. | False |
| Answer» B. False | |