Process Control And Instrumentation — Part 2 MCQs with Explanations

960.5 is the correct answer to “Silver point temperature is __________ °C.”. This question is standard in competitive examination syllabi for Process Control And Instrumentation.

> 100 is the correct answer to “Nitrogen gas constant volume thermometer is suitable for measuring a temperature of __________ °C.”. This question is standard in competitive examination syllabi for Process Control And Instrumentation.

< 0 is the correct answer to “Helium gas constant volume thermometer is suitable for the measurement of a temperature of __________ °C.”. This question is standard in competitive examination syllabi for Process Control And Instrumentation.

$$\frac{{5\pi }}{{12}}$$ is the correct answer to “The time constant of a unity gain, first order plus time delay process is 5 min. If the phase lag at a frequency of 0.2 rad/min is 60°, then the dead time (in minutes) is”. This question is standard in competitive examination syllabi for Process Control And Instrumentation.

P-D controller is the correct answer to “Which of the following controllers has the least maximum deviation”. This question is standard in competitive examination syllabi for Process Control And Instrumentation.

PI is the correct answer to “__________ controller has the maximum stabilising time.”. This question is standard in competitive examination syllabi for Process Control And Instrumentation.

Bode stability is the correct answer to “A control system is unstable, if the open loop frequency response exhibits an amplitude ratio exceeding unity at the crossover frequency. This is __________ criterion.”. This question is standard in competitive examination syllabi for Process Control And Instrumentation.

Outlet flow rate is the correct answer to “In a single tank system, the transfer function of __________ to inlet flow rate is $$\frac{1}{{{\text{TS}} + 1}}.$$”. This question is standard in competitive examination syllabi for Process Control And Instrumentation.

$$\frac{1}{{{{\text{s}}^2} + 2{\text{s}} + 2}}$$ is the correct answer to “Which of the systems having following transfer functions is stable”. This question is standard in competitive examination syllabi for Process Control And Instrumentation.

$$\frac{4}{{{{\text{s}}^3}}}$$ is the correct answer to “For an input forcing function, X(t) = 2t 2 , the Laplace transform of this function is”. This question is standard in competitive examination syllabi for Process Control And Instrumentation.

CO2 percentage in the flue gas is the correct answer to “Thermal conductivity measurement is used for the determination of”. This question is standard in competitive examination syllabi for Process Control And Instrumentation.

Sinusoidal is the correct answer to “Bode diagram are generated from output response of the system subjected to which of the following input”. This question is standard in competitive examination syllabi for Process Control And Instrumentation.

Volumetric expansion is the correct answer to “Working principle of mercury in glass thermometer is based on the __________ of mercury with increase in temperature.”. This question is standard in competitive examination syllabi for Process Control And Instrumentation.

$${\text{w}} = \sqrt {\frac{7}{6}} ,\,{{\text{K}}_{\text{c}}} = \frac{{46}}{3}$$ is the correct answer to “Find the ultimate gain and frequency for a proportional controller in the case of a process having the transfer function $${{\text{G}}_{\text{p}}}\left( {\text{s}} \right) = \frac{1}{{\left( {4{\text{s}} + 1} \right)\left( {2{\text{s}} + 1} \right)\left( {{\text{s}} + 1} \right)}}.$$”. This question is standard in competitive examination syllabi for Process Control And Instrumentation.

Both B and C is the correct answer to “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”. This question is standard in competitive examination syllabi for Process Control And Instrumentation.

Kc is increased is the correct answer to “A proportional controller with a gain of K c is used to control a first order process. The offset will increase, if”. This question is standard in competitive examination syllabi for Process Control And Instrumentation.

Both A & B is the correct answer to “Temperature measuring instruments are standardised mostly with __________ points of pure substances.”. This question is standard in competitive examination syllabi for Process Control And Instrumentation.

Proportional to the square root of is the correct answer to “Flow rate through an orifice is __________ the pressure differential.”. This question is standard in competitive examination syllabi for Process Control And Instrumentation.

Open is the correct answer to “Bode stability method uses __________ loop transfer function.”. This question is standard in competitive examination syllabi for Process Control And Instrumentation.

Closed is the correct answer to “Characteristic equation is the denominator of __________ loop transfer function.”. This question is standard in competitive examination syllabi for Process Control And Instrumentation.

Closed is the correct answer to “Routh stability method uses __________ loop transfer function.”. This question is standard in competitive examination syllabi for Process Control And Instrumentation.

Gold is the correct answer to “Temperature measurement by optical pyrometer is done above __________ point, which is 1063°C.”. This question is standard in competitive examination syllabi for Process Control And Instrumentation.

0.2 is the correct answer to “Dead zone in an instrument must be less than __________ percent of the scale.”. This question is standard in competitive examination syllabi for Process Control And Instrumentation.

More than one is the correct answer to “A non-linear system will have __________ steady state values.”. This question is standard in competitive examination syllabi for Process Control And Instrumentation.

0.5 is the correct answer to “The second order system with the transfer function $$\frac{4}{{{{\text{s}}^2} + 2{\text{s}} + 4}}$$ has a damping ratio of”. This question is standard in competitive examination syllabi for Process Control And Instrumentation.

Differential pressure gage is the correct answer to “Liquid argon level in a pressurised storage tank (at 3 kg/cm 2 ) is measured by a/an”. This question is standard in competitive examination syllabi for Process Control And Instrumentation.

Both A & B is the correct answer to “A bolometer is”. This question is standard in competitive examination syllabi for Process Control And Instrumentation.

All of the above is the correct answer to “A magnetic flowmeter is”. This question is standard in competitive examination syllabi for Process Control And Instrumentation.

Psychrometer is the correct answer to “Which of the following is not a speed measuring instrument”. This question is standard in competitive examination syllabi for Process Control And Instrumentation.

For which the output response is bounded for all bounded input is the correct answer to “A stable system is the one”. This question is standard in competitive examination syllabi for Process Control And Instrumentation.

Fidelity is the correct answer to “Which of the following is the dynamic characteristics of an instrument”. This question is standard in competitive examination syllabi for Process Control And Instrumentation.

Pitot tube is the correct answer to “Liquid flow rate in a small channel is best measured by a/an”. This question is standard in competitive examination syllabi for Process Control And Instrumentation.

Radiation pyrometer is the correct answer to “High temperature of around 2000°C of incandescent gas mantles is measured by a/an”. This question is standard in competitive examination syllabi for Process Control And Instrumentation.

Oxygen in is the correct answer to “Zirconia probe is used for the continuous measurment of __________ flue gases going out of the furnace.”. This question is standard in competitive examination syllabi for Process Control And Instrumentation.

Alcohol in glass thermometer is the correct answer to “Which of the following filled system expansion thermometer has the capability to measure the lowest temperature”. This question is standard in competitive examination syllabi for Process Control And Instrumentation.

Wires is the correct answer to “All the thermocouples used for temperature measurement use dissimilar metal”. This question is standard in competitive examination syllabi for Process Control And Instrumentation.

Alcohol in glass thermometer is the correct answer to “Which of the following filled system expansion thermometers has the lowest positive temperature measurement capability”. This question is standard in competitive examination syllabi for Process Control And Instrumentation.

The maximum is the correct answer to “Process degree of freedom indicates __________ number of controllers to be used.”. This question is standard in competitive examination syllabi for Process Control And Instrumentation.

Thermocouples is the correct answer to “Bimetal strips are not used in”. This question is standard in competitive examination syllabi for Process Control And Instrumentation.

Log (AR) vs. log (f) and (Φ) vs. log (f) is the correct answer to “Bode diagram is a plot of”. This question is standard in competitive examination syllabi for Process Control And Instrumentation.