Instrumentation Engineering
GATE IN format:mcq PYQs
Build your understanding with focused practice from past exam papers.
Questions 171–180 of 360. Imported answers require independent review unless marked reviewed.
Question 19
Open questionINMCQ1 markNeeds review
The figure shows a Chromel-Alumel thermocouple, where the junction A is held at temperature
, and a thermal emf
is measured using an ideal voltmeter between the open ends B1 and B2, both held at temperature
. Two identical copper wires are introduced between B1-C1 and B2-C2 as shown in the figure. When C1 and C2 are held at temperature
, the voltmeter reads a thermal emf
. Then, ______
Your answerChoose one option.
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The resistance of a pure copper wire of length 10 cm and diameter 1 mm is to be measured. The most suitable method from amongst the choices given below is ______
Your answerChoose one option.
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The logic block shown has an output
given by ______
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Open questionINMCQ2 marksNeeds review
A signal
shown is applied from
to
to the circuit shown. Given the initial voltage across the capacitor is 0.3 V, and that the diode is ideal, the open circuit voltage
at
is ________ 
Your answerChoose one option.
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The signal flow graph of a system is shown. The expression for
is ________ 
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Consider the transfer function
. Bilinear transformation with a sampling period of 0.1 s is employed to obtain the discrete-time transfer function
. Then
is ________Your answerChoose one option.
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A car is moving collinearly with a laser beam emitted by a transceiver. A laser pulse emitted at
s is received back by the transceiver 100 ns (nanoseconds) later after reflection from the car. A second pulse emitted at
s is received back 90 ns later. Given the speed of light is
m/s, the average speed of the car in this interval is ________Your answerChoose one option.
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The signal
, where
is the unit-step function, has the Laplace transform
. The value of
is ________Your answerChoose one option.
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A proportional-integral-derivative (PID) controller is employed to stably control a plant with transfer function
. Now, the proportional gain is increased by a factor of 2, the integral gain is increased by a factor of 3, and the derivative gain is left unchanged. Given that the closed-loop system continues to remain stable with the new gains, the steady-state error in tracking a ramp reference signal ________Your answerChoose one option.
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A resistor ladder digital-to-analog converter (DAC) receives a digital input that results in the circuit having the state as shown in the figure. For this digital input, the Thevenin voltage,
, and Thevenin resistance,
, as seen at the output node are ________ 
Your answerChoose one option.
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