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Q1. | Bode diagram are generated from output response of the system subjected to which of the following input? |

A. | Impulse [Wrong Answer] |

B. | Step [Wrong Answer] |

C. | Ramp [Wrong Answer] |

D. | Sinusoidal [Correct Answer] |

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Explanation:-
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**Also Read Similar Questions Below :**

⇒ Which of the following thermocouples will give the highest output for the same value of hot and cold junction temperature ?

Platinum-platinum + rhodium.

Iron-constantan.

Chromel-constantan.

All will give the same output.

⇒ Nichol's chart deals with

A.R.

*vs*. phase lag of first order.

A.R.

*vs*. phase lag of second order.

closed loop values

*vs*. open loop values.

frequency response values of controllers.

⇒ Dome temperature of blast furnace stove is most accurately measured by a

radiation pyrometer.

platinum-platinum/rhodium ther-mocuple.

iron-constantan thermocouple.

platinum resistance thermometer.

⇒ The Laplace transform of exp(at), where a > 0, is defined only for the Laplace parameter, s > a since

the function is exponential.

the Laplace transform of integral of exp(at) has finite values only for s > a.

the Laplace transform integral of exp(at) has initial values only for s > a.

the function exp(at) is piece-wise continuous only for s > a.

⇒ In a second order under damped system, the

time required for the response of first reach its ultimate value is called the response time.

overshoot (which is a measure of how much the response exceeds the ultimate value) increase with the decrease of damping co-efficient e.

decay ratio (which is the ratio of the sizes of successive peaks) is equal to the reciprocal of overshoot.

characteristics of a step response is represented by

⇒ A mercury thermometer can not be used to measure the temperature below the freezing point of mercury, which is __________ °C.

-38.9

-11.9

-60.9

-80.9

⇒ PH meter has

one cell

two cells

three cells

no cell

⇒ The temperature of tempering oil baths maintained at 400°C during heat treatment of steel is measured by a/an __________ thermocouple.

chromel-alumel

iron-constantan

platinum-platinum/rhodium

none of these.

⇒ Minute depression of freezing point of a liquid solvent on addition of a solid solute can be best measured by a

Beckman thermometer

dilatometer

mercury thermometer

bimetallic thermometer

⇒ Flapper nozzle is used in a/an __________ controller.

electronic

hydraulic

pneumatic

none of these

⇒ Thermal conductivity measurement com-prises the working principle of a

CO

_{2}analyser

polarimeter

spectrometer

chromatograph

⇒ Typical specifications for design stipulates the gain margin and phase margin to be respectively

> 1.7 and > 30°

< 1.7 and > 30°

< 1.7 and < 30°

> 1.7 and < 30°

⇒ Find the ultimate gain and frequency for a proportional controller in the case of a process having the transfer function

*G*(

_{p}*s*) = 1/(4

*s*+ 1)(2

*s*+ 1)(

*s*+ 1).

*w*= 1/14,

*K*= 45/714

_{c}*w*= 7/6,

*K*= 46/3

_{c}*w*= 1,

*K*= 13

_{c}*w*= 7/8,

*K*= 45/4

_{c}⇒ Process degree of freedom indicates __________ number of controllers to be used.

the maximum

the minimum

both maximum and the minimum

nothing about the

⇒ Working principle of radiation pyrometer is based on the

Wien's law

Kirchoffs law

stefan-Boltzman law

Seebeck effect

⇒ Which thermocouple can be used to measure a temperature of around 1400°C ?

Copper-constantan

Aluminium-chromel

Platinum-platinum+rhodium

None of these

⇒ Working principle of mercury in glass thermometer is

volumetric expansion.

pressure rise with temperature.

linear expansion.

none of these.

⇒ The closed loop pole of a stable second order system could be

both real and positive.

complex conjugate with positive real parts.

both real and negative.

one real positive and the other real negative.

⇒ Which of the following thermocouples can measure the maximum temperature ?

Platinum-rhodium

Tungsten-molybdenum

Chromel-alumel

Iron-constantan

⇒ Which of the following is an undesirable dynamic characteristic of an instrument ?

Reproducibility

Dead zone

Time lag

Static error

⇒ Operating range of a temperature measuring instrument is 800 to 1600°C. It could be a/an __________ pyrometer.

radiation

optical

photoelectric

none of these

⇒ The frequency response of a first order system, has a phase shift with lower and upper bounds given by

- ∞, π/2

-π/2, π/2

-π/2, 0

0, π/2

⇒ Normal mercury thermometer can be used to measure a temperature of about 300°C. However, its maximum temperature measurement range can be increased upto about 500°C by

filling nitrogen under pressure in the stem.

increasing the diameter of the tube.

using steel tube in place of glass tube.

accounting for the tube expansion.

⇒ Dead zone in an instrument must be less than __________ percent of the scale.

0.2

1.5

4

8

⇒ Zirconia probe is used for the continuous measurment of __________ flue gases going out of the furnace.

oxygen in

carbon dioxide in

carbon monoxide in

temperature of

⇒ The offset introduced by proportional controller with gain

*K*in response of first order system can be reduced by

_{c}reducing value of

*K*.

_{c}introducing integral control.

introducing derivative control.

none of the above.

⇒ Compositional analysis of flue gas coming out of a furnace in respect of O

_{2}and CO

_{2}% can be continuously done by a/an

orsat apparatus

thermal conductivity cell

zirconia probe

chromatograph

⇒ The characteristic equation for the control system with a closed loop transfer function

*G*

_{1}/1 +

*G*

_{2}is given by 1 +

*G*

_{2}= 0. The characteristic equation for the control system

depends only upon the open loop transfer function.

determines its stability.

is the same for set point or load changes.

all 'a', 'b' & 'c'

⇒ If response of a control system is to be free of offset and oscillation, the most suitable controller is

proportional controller.

proportional-derivative(PD)controller.

proportional-integral (PI) controller.

proportional integral-derivative (PID) controller.

⇒ Which of the following is not the triple point of water ?

32°R

273°K

492°R

32°F