# A Level Control Systems Quiz 2

#### Quiz Description

This quiz consists of 15-16  questions on the control system as seen in the A level with 4 options per question and one 1 answer. Covering up all the aspects of the topic with real exam-like questions and varying difficulties. After answering these questions, students will have mastered terms such as open system, close system, control loop, etc.

Control systems as we know are systems that manage, command, and regulate other systems, they are very common and can be seen in our day-to-day lives. Some examples are street lights, robots in factories. There are 2 types of control systems open Open loop and close loop. A close-loop is open in which the output is feedback in the input, while in an open-loop the output isn’t feedback to the input, and example of both can be an error detector and an electric bulb

These quizzes are part of the set of A-level physics quizzes, Do you think you have a passing score on this quiz? Then start answering now.  Good luck

Which terminology deals with the excitation or stimulus applied to the system from an external source for the generation of an output?

Correct
• Input signal
• Output signa
• Feedback signal
• Error signal

Which among the following is not an advantage of an open loop system?

Correct
• Simplicity in construction & design
• Easy maintenance
• Rare problems of stability
• Requirement of system recalibration from time to time

Which notation represents the feedback path in closed loop system representation?

Correct
• b(t)
• r(t)
• e(t)
• c(t)

Basically, poles of transfer function are the laplace transform variable values which causes the transfer function to become ___________

Correct
• Zero
• Average value
• Infinite
• Unity

By equating the denominator of transfer function to zero, which among the following will be obtained?

Correct
• Poles
• Zeros
• Both a and b
• None of the above

The output signal is fed back at the input side from the _________point

Correct
• Summing
• Differential
• Take-off
• All of the above

In a signal flow graph, nodes are represented by small _____

Correct
• Circles
• Squares
• Arrows
• Pointers

Which type of node comprises incoming as well as outgoing branches?

Correct
• Source node.
• Sink node
• Chain node
• Main node

Where are the dummy nodes added in the branch with unity gain?

Correct
• At input & output nodes .
• Between chain nodes
• Both a and b
• None of the above

Which among the following is/are an/the illustration/s of a sinusoidal input?

Correct
• Setting the temperature of an air conditioner
• Input given to an elevator
• Checking the quality of speakers of music system
• All of the above

If a system is subjected to step input, which type of static error coefficient performs the function of controlling steady state error?

Correct
• Position
• Acceleration
• Velocity
• Retardation

If the complex conjugate poles are located at RHP, what would be the nature of corresponding impulse response?

Correct
• Exponential
• Damping oscillations
• Increasing amplifier
• Constant amplitude oscillations

Root locus specifies the movement of closed loop poles especially when the gain of system ________

Correct
• Remains constant
• Gives infinite poles
• Gives zero feedback
• Exhibit variations

If a linear system is subjected to an input r(t) = Asin(ωt), what output will be generated?

Correct
• c(t) = B sin (ωt + Φ)
• c(t) = B cos (ωt + Φ)
• c(t) = B tan (ωt + Φ)
• c(t) = B cot (ωt + Φ)

In P-I controller, what does an integral of a function compute?

Correct
• Density of curve
• Area under the curve
• Volume over the curve
• Circumference of curve