The root locus plot of the roots of the characteristics equation of a closed loop system having the open loop transfer function K(s + 1)/2(2s + 1)(3s + 1) will have a definite number of loci for variation of K from 0 to ∞. The number of loci is

Process Control and Instrumentation
The root locus plot of the roots of the characteristics equation of a closed loop system having the open loop transfer function K(s + 1)/2(2s + 1)(3s + 1) will have a definite number of loci for variation of K from 0 to ∞. The number of loci is

2

4

1

3

2

4

1

3

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Process Control and Instrumentation
A first order system with a time constant of 1 min is subjected to frequency response analysis. At an input frequency of 1 radian/min, the phase shift is

-90°

-180°

45°

-45°

-90°

-180°

45°

-45°

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Process Control and Instrumentation
A negative gain margin expressed in decibels means a/an __________ system.

None of these

Unstable

Critically damped

Stable

None of these

Unstable

Critically damped

Stable

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Process Control and Instrumentation
Suppose that the gain, time constant and dead time of a process with the following transfer function:Gc(s) = 10 exp( - 0.1s)/(0.5s + 1) are known with a possible error of ± 20% of their values. The largest permissible gain Kc of a proportional controller needs to be calculated below taking the values of process gain, time constant and dead time as

12, 0.6, 0.12

12, 0.4, 0.08

8, 0.6, 0.12

8, 0.6, 0.08

12, 0.6, 0.12

12, 0.4, 0.08

8, 0.6, 0.12

8, 0.6, 0.08

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Process Control and Instrumentation
Temperature measurement range of iron-constantan thermocouple is 0 to 870°C. It can be used to measure sub zero temperature, because at lower temperature

Both B and C Here

Embrittlement of iron occurs

Rusting of iron takes place

Emf produced is very low of the order of microvolt

Both B and C Here

Embrittlement of iron occurs

Rusting of iron takes place

Emf produced is very low of the order of microvolt

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Process Control and Instrumentation
In Bode plot, Φ vs ω is plotted on a/an __________ graph paper.

Semi-log

Triangular

Log-log

Ordinary

Semi-log

Triangular

Log-log

Ordinary

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Process Control and Instrumentation

Process Control and Instrumentation The root locus plot of the roots of the characteristics equation of a closed loop system having the open loop transfer function K(s + 1)/2(2s + 1)(3s + 1) will have a definite number of loci for variation of K from 0 to ∞. The number of loci is

Process Control and Instrumentation A first order system with a time constant of 1 min is subjected to frequency response analysis. At an input frequency of 1 radian/min, the phase shift is

Process Control and Instrumentation A negative gain margin expressed in decibels means a/an __________ system.

Process Control and Instrumentation Temperature measurement range of iron-constantan thermocouple is 0 to 870°C. It can be used to measure sub zero temperature, because at lower temperature

Process Control and Instrumentation In Bode plot, Φ vs ω is plotted on a/an __________ graph paper.

Process Control and Instrumentation
The root locus plot of the roots of the characteristics equation of a closed loop system having the open loop transfer function K(s + 1)/2(2s + 1)(3s + 1) will have a definite number of loci for variation of K from 0 to ∞. The number of loci is

Process Control and Instrumentation
A first order system with a time constant of 1 min is subjected to frequency response analysis. At an input frequency of 1 radian/min, the phase shift is

Process Control and Instrumentation
A negative gain margin expressed in decibels means a/an __________ system.

Process Control and Instrumentation
Temperature measurement range of iron-constantan thermocouple is 0 to 870°C. It can be used to measure sub zero temperature, because at lower temperature

Process Control and Instrumentation
In Bode plot, Φ vs ω is plotted on a/an __________ graph paper.