Inst ToolsInst ToolsInst Tools
  • Courses
  • Automation
    • PLC
    • Control System
    • Safety System
    • Communication
    • Fire & Gas System
  • Instrumentation
    • Design
    • Pressure
    • Temperature
    • Flow
    • Level
    • Vibration
    • Analyzer
    • Control Valve
    • Switch
    • Calibration
    • Erection & Commissioning
  • Interview
    • Instrumentation
    • Electrical
    • Electronics
    • Practical
  • Q&A
    • Instrumentation
    • Control System
    • Electrical
    • Electronics
    • Analog Electronics
    • Digital Electronics
    • Power Electronics
    • Microprocessor
  • Request
Search
  • Books
  • Software
  • Projects
  • Process
  • Tools
  • Basics
  • Formula
  • Power Plant
  • Root Cause Analysis
  • Electrical Basics
  • Animation
  • Standards
  • 4-20 mA Course
  • Siemens PLC Course
Reading: Construction of Phase -Trajectories
Share
Notification Show More
Font ResizerAa
Inst ToolsInst Tools
Font ResizerAa
  • Courses
  • Design
  • PLC
  • Interview
  • Control System
Search
  • Courses
  • Automation
    • PLC
    • Control System
    • Safety System
    • Communication
    • Fire & Gas System
  • Instrumentation
    • Design
    • Pressure
    • Temperature
    • Flow
    • Level
    • Vibration
    • Analyzer
    • Control Valve
    • Switch
    • Calibration
    • Erection & Commissioning
  • Interview
    • Instrumentation
    • Electrical
    • Electronics
    • Practical
  • Q&A
    • Instrumentation
    • Control System
    • Electrical
    • Electronics
    • Analog Electronics
    • Digital Electronics
    • Power Electronics
    • Microprocessor
  • Request
Follow US
All rights reserved. Reproduction in whole or in part without written permission is prohibited.
Inst Tools > Blog > Multiple Choice Questions > Construction of Phase -Trajectories

Construction of Phase -Trajectories

Last updated: November 27, 2021 5:40 pm
Editorial Staff
Multiple Choice Questions
No Comments
Share
5 Min Read
SHARE

Construction of Phase -Trajectories

1. Electrical time-constant of an armature-controlled dc servomotor is :

a) Equal to mechanical time-constant
b) Smaller than mechanical time-constant
c) Larger than mechanical time-constant
d) Not related to mechanical time-constant

Answer: b

Explanation: Electrical time constant is smaller than the mechanical time constant and hence the delay in the mechanical systems is more than the electrical systems.

2. The open-loop transfer function of a unity feedback system is K/(s^2 (s+5))The system is unstable for

a) K>5
b) K<5
c) K>0
d) All of the mentioned

Answer: d

Explanation: The open loop transfer function of a unity feedback system is used to calculate the conditional stability by using the Routh Hurwitz criteria or the Root locus technique.

3. Peak overshoot of step-input response of an underdamped second-order system is explicitly indicative of

a) Settling time
b) Rise time
c) Natural frequency
d) Damping ratio

Answer: d

Explanation: Peak overshoot refers to the damping of the system as if the damping id less than the peak will be more.

4. A unity feedback system with open-loop transfer function G (s) = 4/[s(s+p)] is critically damped. The value of the parameter p is

a) 4
b) 3
c) 2
d) 1

Answer: a

Explanation: The value of the p can be calculated by comparing the equation with the standard characteristic equation.

5. Polar plot of G (jw) = 1/jw(jw+t) is

a) Crosses the negative real axis
b) Crosses the negative imaginary axis
c) Crosses the positive imaginary axis
d) None of the mentioned

Answer: d

Explanation: Polar plot can be made of the following function by following appropriate steps and thus the plot neither crosses the real axis nor imaginary axis.

6. In optimum time switching curve the system takes :

a) Minimum time in reaching desired location
b) Maximum time in reaching desired location
c) Never reaches
d) No desired location is present

Answer: a

Explanation: If switching is made to occur the crossing of the starting trajectory with the thick line trajectory the system follows the trajectory and reaches the desired output at the minimum time.

7. System with logic switching are :

a) Hang on
b) Bang on
c) Bang-bang
d) Hang out

Answer: c

Explanation: Suitable logic circuitry has to be added to the controller structure for the kind of the switching and such systems are known as the bang-bang control system.

8. Zeroes are defined as:

a) Roots of the denominator of the closed loop transfer function
b) Roots of the numerator of the closed loop transfer function
c) Both of the mentioned
d) None of the mentioned

Answer: b

Explanation: Zeroes are defined as the roots of the numerator of the closed loop system.

9. As zero moves sufficiently left from the origin the effect of zero becomes less pronounced.

a) True
b) False

Answer: a

Explanation: The effect of zero on transient response will be negligible if the zero moves left from the origin due to dominant pole mechanism.

10. Assertion (A): The zeroes on the real axis near the origin are generally avoided in design.
Reason (R): In a sluggish system introduction of zeroes can improve the transient response

a) Both A and R are true and R is correct explanation of A
b) Both A and R are true but R is not correct explanation of A
c) A is true but R is false
d) A is false but R is true

Answer: b

Explanation: The zeroes on the real axis near the origin are generally avoided in design as they cause system instability.

Don't Miss Our Updates
Be the first to get exclusive content straight to your email.
We promise not to spam you. You can unsubscribe at any time.
Invalid email address
You've successfully subscribed !

Continue Reading

Concept of Stability in Control Systems
Z & S Domain Relationship
Hydraulic Systems Objective Questions
Infrared Spectrometers Questions & Answers
Robotic Control System – Part I
Gas Solid Chromatography Questions & Answers
Share This Article
Facebook Whatsapp Whatsapp LinkedIn Copy Link
Share
Leave a Comment

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Stay Connected

128.3kFollowersLike
69.1kFollowersFollow
210kSubscribersSubscribe
38kFollowersFollow

Categories

Explore More

Amino-Acid Analyzers Questions & Answers
Z-transform Analysis of Sampled-Data Control Systems
Top 100 Power Plant Engineering Objective Questions & Answers
Hydrocarbons Questions & Answers
Operation of Chromatography Questions & Answers
Logic Families Questions and Answers
Encoder Multiple Choice Questions
Parameter Optimization

Keep Learning

Level Measurement Objective Questions

Level and Density Measurement Objective Questions

Pumps Quiz

Pumps Quiz

Analyzers Questions and Answers

Electrochemical Methods for Oxygen Analysis Questions & Answers

State Variable Analysis and Design

Controllability & Observability

Analyzers Questions and Answers

Pulse Height Analyzer Questions & Answers

Frequency Response MCQ

Bode Plots MCQ

Time Response Analysis

State Variable Analysis – Part II

Nuclear Magnetic Resonance Spectrometer Questions and Answers

Sensivity Enhancement for NMR Spectroscopy Questions & Answers

Learn More

Electronic Devices & Circuits Objective Questions

Electronic Devices & Circuits Quiz – Set 7

Electrical Switchgear & Protection Interview Questions

Electrical Switchgear & Protection Interview Questions

Control Valves Classification

Classification of Control Valves

PLC Boxes Sorting Based on Height

PLC Programming: Sorting and Distribution of Boxes by Height

Types of Scan Time in a PLC

#16 PLC Best Practices – Create Trend for Cycle Time on HMI

Scaling Sensor Output to Engineering Units

Scaling Sensor Output to Engineering Units

Siemens Tia Portal Function Block

Function Blocks in PLC (FBs) – What You Need To Know?

Electrical Machines Questions and Answers

Synchronous Machines EMF Questions

Menu

  • About
  • Privacy Policy
  • Copyright

Quick Links

  • Learn PLC
  • Helping Hand
  • Part Time Job

YouTube Subscribe

Follow US
All rights reserved. Reproduction in whole or in part without written permission is prohibited.
Welcome Back!

Sign in to your account

Username or Email Address
Password

Lost your password?