The deflection in diaphragm (which is used as pressure sensor in pneumatic and electronic instruments) is dependent on the metal thickness, its diameter (d) and shape & number of corrugations. Its deflection is proportional to

Process Control and Instrumentation
The deflection in diaphragm (which is used as pressure sensor in pneumatic and electronic instruments) is dependent on the metal thickness, its diameter (d) and shape & number of corrugations. Its deflection is proportional to

D²

D

D³

D⁴

D²

D

D³

D⁴

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Process Control and Instrumentation
When the damping co-efficient (ξ) is unity, the system is

Critically damped

Overdamped

Underdamped

Highly fluctuating

Critically damped

Overdamped

Underdamped

Highly fluctuating

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Process Control and Instrumentation
A control system is unstable, if the open loop frequency response exhibits an amplitude ratio exceeding unity at the crossover frequency. This is __________ criterion.

Nyquist

Routh stability

None of these

Bode stability

Nyquist

Routh stability

None of these

Bode stability

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Process Control and Instrumentation
Find the ultimate gain and frequency for a proportional controller in the case of a process having the transfer function Gp(s) = 1/(4s + 1)(2s + 1)(s + 1).

W = 1/√14, Kc = 45/7√14

W = 1, Kc = 13

W = √(7/8), Kc = 45/4

W = √(7/6), Kc = 46/3

W = 1/√14, Kc = 45/7√14

W = 1, Kc = 13

W = √(7/8), Kc = 45/4

W = √(7/6), Kc = 46/3

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Process Control and Instrumentation
Thermal well made of __________ gives the fastest speed of response, while measuring temperature by thermocouples.

Vycor (a glass)

Steel

Nichrome

Inconel

Vycor (a glass)

Steel

Nichrome

Inconel

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Process Control and Instrumentation
Which of the following thermocouples has the least temperature measurement range?

Platinum-platinum/rhodium

Chromel-alumel

Iron-constantan

Copper-constantan

Platinum-platinum/rhodium

Chromel-alumel

Iron-constantan

Copper-constantan

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Process Control and Instrumentation

Process Control and Instrumentation The deflection in diaphragm (which is used as pressure sensor in pneumatic and electronic instruments) is dependent on the metal thickness, its diameter (d) and shape & number of corrugations. Its deflection is proportional to

Process Control and Instrumentation When the damping co-efficient (ξ) is unity, the system is

Process Control and Instrumentation A control system is unstable, if the open loop frequency response exhibits an amplitude ratio exceeding unity at the crossover frequency. This is __________ criterion.

Process Control and Instrumentation Find the ultimate gain and frequency for a proportional controller in the case of a process having the transfer function Gp(s) = 1/(4s + 1)(2s + 1)(s + 1).

Process Control and Instrumentation Thermal well made of __________ gives the fastest speed of response, while measuring temperature by thermocouples.

Process Control and Instrumentation Which of the following thermocouples has the least temperature measurement range?

Process Control and Instrumentation
The deflection in diaphragm (which is used as pressure sensor in pneumatic and electronic instruments) is dependent on the metal thickness, its diameter (d) and shape & number of corrugations. Its deflection is proportional to

Process Control and Instrumentation
When the damping co-efficient (ξ) is unity, the system is

Process Control and Instrumentation
A control system is unstable, if the open loop frequency response exhibits an amplitude ratio exceeding unity at the crossover frequency. This is __________ criterion.

Process Control and Instrumentation
Find the ultimate gain and frequency for a proportional controller in the case of a process having the transfer function Gp(s) = 1/(4s + 1)(2s + 1)(s + 1).

Process Control and Instrumentation
Thermal well made of __________ gives the fastest speed of response, while measuring temperature by thermocouples.

Process Control and Instrumentation
Which of the following thermocouples has the least temperature measurement range?