Question 1

In pneumatic control systems the control valve used as final control element converts
A)pressure signal to electric signal
B)pressure signal to position change
C)electric signal to pressure signal
D)position change to pressure signal

Accepted Answer

The control valve in pneumatic control systems converts a pressure signal to a position change, effectively translating the pneumatic signal into mechanical action to adjust the flow of materials through the system.

Question 2

Pressure error can be measured by which of the following ?
A)differential bellows and straingauge
B)selsyn
C)strain gauge
D)strain gauge and potentiometer

Accepted Answer

A

Question 3

Which of the following devices is used for conversion of co-ordinates ?
A)microsyn
B)selsyn
C)synchro-resolver
D)synchro-transformer

Accepted Answer

Synchro-resolvers are used for the conversion of coordinates, specifically for converting angular position or motion into an electrical signal, which can be interpreted in terms of coordinate data.

Question 4

The effect of error damping is to
A)provide larger settling lime
B)delay the response
C)reduce steady state error
D)any of the above

Accepted Answer

Error damping is primarily aimed at reducing the steady state error in control systems, making the system more accurate in tracking its desired output.

Question 5

technique gives quick transient and stability response
A)root locus
B)bode
C)nyquist
D)nichols

Accepted Answer

Root locus technique provides a graphical method for examining how the roots of a system change with variation of a certain system parameter, which helps in analyzing the transient and stability response of the system.

Question 6

A phase lag lead network introduces in the output
A)lag at all frequencies
B)lag at high frequencies and lead at low frequencies
C)lag at low frequencies and lead at high frequencies
D)none of the above

Accepted Answer

A phase lag lead network introduces a phase lag at low frequencies and a phase lead at high frequencies. This is due to the frequency-dependent phase shift introduced by the network's reactive components (capacitors and inductors).

Question 7

Which of the following is the non-linearity caused by servomotor ?
A)static friction
B)backlash
C)saturation
D)none of the above

Accepted Answer

Saturation in a servomotor refers to the condition where an increase in input signal does not result in a proportional increase in output, indicating a non-linear behavior. This is due to the motor reaching its maximum capacity or limit.

Question 8

can be extended to systems which are time-varying ?
A)bode-nyquist stability methods
B)transfer functions
C)root locus design
D)state model representatives

Accepted Answer

State model representatives can be extended to time-varying systems as they can represent dynamic systems with time-dependent parameters.

Question 9

When the initial conditions of a system are specified to be zero it implies that the system is
A)at rest without any energy stored in it
B)working normally with reference input
C)working normally with zero reference input
D)at rest but stores energy

Accepted Answer

The answer of When the initial conditions of a system...

Question 10

Which of the following is an electromagnetically device ?
A)induction relay
B)thermocouple
C)lvdt
D)any of the above

Accepted Answer

The answer of Which of the following is an electromagnetically...

Question 11

A differentiator is usually not a part of a control system because it
A)reduces damping
B)reduces the gain margin
C)increases input noise
D)increases error

Accepted Answer

Differentiators amplify high-frequency noise present in the input signal, which can lead to instability and erratic behavior in control systems.

Question 12

If the gain of the critical damped system is increased it will behave as
A)oscillatory
B)critically damped
C)overdamped
D)underdamped

Accepted Answer

Increasing the gain of a critically damped system pushes it into the underdamped region, where the system starts to exhibit oscillatory behavior before eventually settling to its final value.

Question 13

In a control system integral error compensation _______ steady state error
A)increases
B)minimizes
C)does not have any effect on
D)any of the above

Accepted Answer

Integral error compensation in a control system minimizes steady-state error by integrating the error over time, which helps in reducing the error to zero.

Question 14

An amplidyne can give which of the following characteristics ?
A)constant current
B)constant voltage
C)constant current as well as constant voltage
D)constant current, constant voltage and constant power

Accepted Answer

The answer of An amplidyne can give which of the...

Question 15

Which of the following can be measured by LVDT?
A)displacement
B)velocity
C)acceleration
D)any of the above

Accepted Answer

The answer of Which of the following can be measured...

Quiz 4: Pneumatic Control Systems and Control Elements

In pneumatic control systems the control valve used as final control element converts

Pressure error can be measured by which of the following ?

Which of the following devices is used for conversion of co-ordinates ?

The effect of error damping is to

technique gives quick transient and stability response

A phase lag lead network introduces in the output

Which of the following is the non-linearity caused by servomotor ?

can be extended to systems which are time-varying ?

When the initial conditions of a system are specified to be zero it implies that the system is

Which of the following is an electromagnetically device ?

A differentiator is usually not a part of a control system because it

If the gain of the critical damped system is increased it will behave as

In a control system integral error compensation _______ steady state error

An amplidyne can give which of the following characteristics ?

Which of the following can be measured by LVDT?