Questions without answers in Instrumentation and Process Control

The transfer function of a Proportional-Integral $\text{(PI)}$ controller $G_{C}(s)$ is given by\[G_{C}(s)=K_{C}\left(1+\frac{1}{\tau_{I} s}\right)\]where $K_{C}$ is the ...

In the open-loop process shown in the figure, the input $U(s)$, the transfer function $G_{p}(s)$ and the output $Y(s)$ are given in the Laplace domain in terms of the Lap...

​​​​A thermometer measuring body temperature follows a first-order response with a time constant of $40$ seconds. The instrument will reach $95 \%$ of its steady-state ou...

​​​​​The output $y(t)$ of a first-order process is governed by the following differential equation\[\tau_{p} \frac{d y}{d t}+y=K_{p} f(t)\]where $\tau_{p}$ is a non-zero ...

The transfer function of a process is $G(s)=\frac{K_{p}}{\tau_{p} s+1}$, where $K_{p}$ is the gain and $\tau_{p}$ is the time constant. This is a $\_\_\_\_\_\_$ process.f...

A proportional controller is used to control the temperature of an autoclave from $60^{\circ} \mathrm{C}$ to $130^{\circ} \mathrm{C}$. If the proportional band setting of...

Which of the following statements are $\text{CORRECT}$ for a controller?In a proportional controller, a control action is proportional to the errorIn an integral controll...

The process and instrumentation diagram for a feedback control strategy to maintain the level $(h)$ of a liquid by regulating a valve $(V)$ in a tank is shown below. $F_1...

Which one of the following statements is $CORRECT$ about proportional controllers?The initial change in control output signal is relatively slowThe initial corrective act...

Match the instruments in $Group\; I$ with their corresponding measurements in $Group\; II$.$$\begin{array}&&\textbf{Group I} & \textbf{Group II} \\ &\text{P. Manometer} ...

Match the entries in $\text{Group I}$ with the process parameters in $\text{Group II}$.$\begin{array}{|C|l|C|l|} \hline &\textbf{Group I} & {} & \text{Group II} \\\hline ...