GATE IN topic:process-control PYQs & Answers — Page 39

Questions 381–390 of 650. Imported answers require independent review unless marked reviewed.

Topic practice 650 questionsPage 39 of 65

Consider a system with transfer-function

. A unit step function

is applied to the system, which results in an output

. If

, then

is ___.

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The circuit shown below uses an ideal OpAmp. Output

in volt is ______ (rounded off to one decimal place).

Diagram for Instrumentation Engineering question 47

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All the transistors used in the circuit are matched and have a current gain

of 20. Neglecting the Early effect, the current

in milliampere is _____.

Diagram for Instrumentation Engineering question 48

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The power in a 400 V (rms, line-line) three-phase, three-wire RYB sequence system is measured using the two wattmeters, as shown. The R-line current is

A. Wattmeter

in the R-line will read (in watt) __________.

Diagram for Instrumentation Engineering question 49

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A 3½ digit, rectifier type digital meter is set to read in its 2000 V range. A symmetrical square wave of frequency 50 Hz and amplitude ±100 V is measured using the meter. The meter will read _____.

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A bar primary current transformer of rating 1000/1 A, 5 VA, UPF has 995 secondary turns. It exhibits zero ratio error and phase error of 30 minutes at 1000 A with rated burden. The watt loss component of the primary excitation current in ampere is __________ (rounded off to one decimal place).

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In the bridge circuit shown, the voltmeter V showed zero when the value of the resistors are:

, and

. If

, the value of

in ohm is _____.

Diagram for Instrumentation Engineering question 52

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For the full bridge made of linear strain gages with gage factor 2 as shown in the diagram,

at 0 °C and strain is 0. The temperature coefficient of resistance of the strain gages used is 0.005 per °C. All strain gages are made of same material and exposed to same temperature. While measuring a strain of 0.01 at a temperature of 50 °C, the output

in millivolt is _____ (rounded off to two decimal places).

Diagram for Instrumentation Engineering question 53

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A signal having a bandwidth of 5 MHz is transmitted using the Pulse code modulation (PCM) scheme as follows. The signal is sampled at a rate of 50% above the Nyquist rate and quantized into 256 levels. The binary pulse rate of the PCM signal in Mbits per second is ___.

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In the figure shown, a large multimode fiber with

and

is used for sensing. A portion with the cladding removed passes through a liquid with refractive index

. An LED is used to illuminate the fiber from one end and a paper is placed on the other end, 1 cm from the end of the fiber. The paper shows a spot with radius 1 cm. The refractive index

of the liquid (rounded off to two decimal places) is __________.

Diagram for Instrumentation Engineering question 55

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GATE IN topic:process-control PYQs

Question 46

Question 47

Question 48

Question 49

Question 50

Question 51

Question 52

Question 53

Question 54

Question 55