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Control Systems Mcqs

Q:

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 & Explanation Answer: A) 10(s-1)/(s+2)

Explanation: G(s) =1/(s-1)(s+1)
The lead compensator C(s) should stabilize the plant as it is similar to the differentiator and the tendency of it is to stablize the system by increasing the damping hence remove the first term so only option (a) satisfies.

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1200
Q:

Oscillations in output response is due to :

A) Positive feedback B) Negative feedback
C) No feedback D) None of the mentioned
 
Answer & Explanation Answer: A) Positive feedback

Explanation: Oscillations are the unwanted sinuoidal signals with high gain in positive feedback and s the damping factor is absent in the positive feedback system entirely oscillations are present.

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1077
Q:

Vector images are __________

A) Composed of pixels B) Composed of thousands of dots
C) Slightly more difficult to manipulate than other images D) Composed of objects such as lines, rectangles, and ovals
 
Answer & Explanation Answer: D) Composed of objects such as lines, rectangles, and ovals

Explanation: Vector images use geometric shapes or objects.

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998
Q:

Characteristics of non-servo robot are:

A) Relatively inexpensive compared to servo robots B) Simple, understand and operate
C) Precise and reliable D) Closed loop system.
 
Answer & Explanation Answer: D) Closed loop system.

Explanation: Non-servo robots are open loop system and less costly and they are less complex and can be used once or twice for some work and they are less reliable.

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876
Q:

A collection of graphics programs and supporting data files is called a __________

A) Groupware application B) Freehand package
C) Graphics suite D) Shared program collection
 
Answer & Explanation Answer: C) Graphics suite

Explanation: A graphics suite is a combination or bundle of separate graphics packaged in groups.

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681
Q:

Programs used to create or modify bitmap images are called __________

A) Illustration programs B) Paint programs
C) Graphical modifiers D) Bit publishing packages
 
Answer & Explanation Answer: B) Paint programs

Explanation: Image editors (also known as paint programs) are programs for creating and editing bitmap images.

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615
Q:

Valves can be classified according to their use as:

A) Directional flow B) Pressure control
C) Flow control D) All of the mentioned
 
Answer & Explanation Answer: D) All of the mentioned

Explanation: Valve is a device that is used to control the flow of liquid by obstructing the flow and they can be classified based on their structure and their requirement.

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404
Q:

The most common hydraulic fluid is:

A) Mineral oil B) Synthetic fluid
C) Water D) Gel
 
Answer & Explanation Answer: C) Water

Explanation: Hydraulic fluid is the fluid that is causing conversion process and used in control action which is chemically inert and readily available.

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