Question 1

Zero initial condition for a system means
A)input reference signal is zero
B)zero stored energy
C)ne initial movement of moving parts
D)system is at rest and no energy is stored in any of its components

Accepted Answer

Zero initial condition for a system means the system is at rest and no energy is stored in any of its components.

Question 2

Transfer function of a system is used to calculate which of the following ?
A)the order of the system
B)the time constant
C)the output for any given input
D)the steady state gain

Accepted Answer

The transfer function of a system is a mathematical representation that relates the output of a system to its input in the frequency domain, allowing calculation of the output for any given input.

Question 3

The band width, in a feedback amplifier.
A)remains unaffected
B)decreases by the same amount as the gain increase
C)increases by the sane saaaajajt as the gain decrease
D)decreases by the same amount as the gain decrease

Accepted Answer

Feedback in amplifiers tends to stabilize the gain and extend the bandwidth. This means that as the gain decreases due to feedback, the bandwidth increases, compensating for the loss in gain. This is a fundamental principle in feedback amplifier design, aiming to achieve a wider frequency response while controlling the gain.

Question 4

load disturbances depend ?
A)frequency
B)loop gain
C)forward gain
D)all of the above

Accepted Answer

Load disturbances in a control system can depend on various factors including the frequency of the disturbance, the loop gain, and the forward gain of the system. These elements influence how the system responds to changes or disturbances in the load, affecting stability and performance.

Question 5

The transient response, with feedback system,
A)rises slowly
B)rises quickly
C)decays slowly
D)decays quickly

Accepted Answer

The answer of The transient response, with feedback system,
A)rises slowly
B)rises...

Question 6

The second derivative input signals modify which of the following ?
A)the time constant of the system
B)damping of the system
C)the gain of the system
D)the time constant and suppress the oscillations

Accepted Answer

The second derivative input signals modify the time constant and suppress the oscillations.

Question 7

Which of the following statements is correct for a system with gain margin close to unity or a phase margin close to zero ?
A)the system is relatively stable
B)the system is highly stable
C)the system is highly oscillatory
D)none of the above

Accepted Answer

A system with a gain margin close to unity or a phase margin close to zero is highly oscillatory, indicating it is on the verge of instability rather than being stable.

Question 8

Due to which of the following reasons excessive bond width in control systems should be avoided ?
A)it leads to slow speed of response
B)it leads to low relative stability
C)noise is proportional to band width
D)none of the above

Accepted Answer

Excessive bandwidth in control systems should be avoided because noise is proportional to bandwidth, meaning that a wider bandwidth allows more noise to enter the system, potentially degrading performance.

Question 9

In a stable control system backlash can cause which of the following ?
A)underdamping
B)overdamping
C)poor stability at reduced values of open loop gain
D)low-level oscillations

Accepted Answer

The answer of In a stable control system backlash can...

Question 10

In an automatic control system which of the following elements is not used ?
A)error detector
B)final control element
C)sensor
D)oscillator

Accepted Answer

Oscillators are not typically used in automatic control systems. Their main function is to generate repetitive signals, which doesn't align with the primary functions of control systems such as error detection, measurement, and control action execution. Control systems usually consist of sensors to measure the process variable, error detectors to compare the measured value with a set point, and final control elements to adjust the process.

Question 11

In a control system the output of the controller is given to
A)final control element
B)amplifier
C)comparator
D)sensor

Accepted Answer

The output of the controller in a control system is typically given to the final control element, which directly manipulates the process being controlled.

Question 12

A controller, essentially, is a
A)sensor
B)clipper
C)comparator
D)amplifier

Accepted Answer

A controller functions as a comparator by comparing the actual value of a system's output to the desired value and making decisions to adjust the system's behavior to meet the desired output.

Question 13

The capacitance, in force-current analogy, is analogous to
A)momentum
B)velocity
C)displacement
D)mass

Accepted Answer

In the force-current analogy, capacitance is analogous to mass. This is because the relationship between charge and voltage in a capacitor (Q = CV) is analogous to the relationship between momentum (or mass times velocity) and force in a mechanical system. Just as mass resists changes in velocity, capacitance resists changes in voltage.

Question 14

The temperature, under thermal and electrical system analogy, is considered analogous to
A)voltage
B)current
C)capacitance
D)charge

Accepted Answer

In thermal and electrical system analogies, temperature is considered analogous to voltage. This is because just as voltage (potential difference) drives the flow of electrical charge in an electrical circuit, temperature difference drives the flow of heat in a thermal system.

Question 15

In electrical-pneumatic system analogy the current is considered analogous to
A)velocity
B)pressure
C)air flow
D)air flow rate

Accepted Answer

The answer of In electrical-pneumatic system analogy the current is...

Question 16

In liquid level and electrical system analogy, voltage is considered analogous to
A)head
B)liquid flow
C)liquid flow rate
D)none of the above

Accepted Answer

In liquid level and electrical system analogy, voltage is analogous to head. This is because both represent potential energy in their respective systems - voltage as electrical potential energy and head as hydraulic potential energy.

Question 17

The viscous friction co-efficient, in force-voltage analogy, is analogous to
A)charge
B)resistance
C)reciprocal of inductance
D)reciprocal of conductance

Accepted Answer

In the force-voltage analogy, viscous friction coefficient is analogous to electrical resistance. This is because both represent opposition to motion or flow (mechanical motion in the case of viscous friction and electrical current in the case of resistance), and both dissipate energy in the form of heat.

Question 18

In force-voltage analogy, velocity is analogous to
A)current
B)charge
C)inductance
D)capacitance

Accepted Answer

In the force-voltage analogy, velocity is analogous to current, as both represent a rate of change (velocity is the rate of change of position, and current is the rate of change of charge).

Question 19

In thermal-electrical analogy charge is considered analogous to
A)heat flow
B)reciprocal of heat flow
C)reciprocal of temperature
D)temperature

Accepted Answer

The answer of In thermal-electrical analogy charge is considered analogous...

Question 20

Mass, in force-voltage analogy, is analogous to
A)charge
B)current
C)inductance
D)resistance

Accepted Answer

In the force-voltage analogy, mass is analogous to inductance. This is because both mass and inductance resist changes in their respective systems: mass resists changes in velocity (Newton's second law), and inductance resists changes in current (defined by V = L(di/dt)).

Quiz 2: Control Systems and Analogies

Zero initial condition for a system means

Transfer function of a system is used to calculate which of the following ?

The band width, in a feedback amplifier.

load disturbances depend ?

The transient response, with feedback system,

The second derivative input signals modify which of the following ?

Which of the following statements is correct for a system with gain margin close to unity or a phase margin close to zero ?

Due to which of the following reasons excessive bond width in control systems should be avoided ?

In a stable control system backlash can cause which of the following ?

In an automatic control system which of the following elements is not used ?

In a control system the output of the controller is given to

A controller, essentially, is a

The capacitance, in force-current analogy, is analogous to

The temperature, under thermal and electrical system analogy, is considered analogous to

In electrical-pneumatic system analogy the current is considered analogous to

In liquid level and electrical system analogy, voltage is considered analogous to

The viscous friction co-efficient, in force-voltage analogy, is analogous to

In force-voltage analogy, velocity is analogous to

In thermal-electrical analogy charge is considered analogous to

Mass, in force-voltage analogy, is analogous to