AP PGECET 2026 Instrumentation Engineering Question Paper is available for download here. Andhra University, Visakhapatnam on behalf of APSCHE conducted AP PGECET 2026 Instrumentation Engineering exam on April 30 in Shift 1. AP PGECET is a state-level entrance exam conducted online for admission into M.Tech./M.Pharm./Pharm.D (PB) courses.
- AP PGECET Question Paper consists of 120 questions divided into two sections- Mathematics and Engineering Domain Specific.
- Each correct answer answer carries 1 mark and there is no negative marking for incorrect answer.
Candidates can download AP PGECET 2026 Instrumentation Engineering Question Paper with Answer Key and Solution PDF from the links provided below.
AP PGECET 2026 Instrumentation Engineering Question Paper with Solutions
| AP PGECET 2026 Instrumentation Engineering Question Paper | Download PDF | Check Solution |
The input resistance \(V_{in} / I_{in}\) for the network shown in the figure is
The time constant (in sec.) for the network shown in the figure is
The unit of reactive power is
A circuit which resonates at \(1 MHz\) has Q of 100. Bandwidth between half-power point is
Find the value of Z(s) in the figure
The equivalent capacitance for the network shown in the figure is
A delta connected network with its wyes equivalent is shown in the figure. The resistances R1, R2 and R3 (in ohm) are respectively
The current I supplied by the DC voltage source in the circuit shown in the figure is ______
A particular band-pass function has a network function as \(H(s) = \frac{3s}{s^2+4s+3}\) then its quality factor Q is defined by
Which of the following statements is true with respect to effective mass of an electron in a semiconductor lattice?
The avalanche breakdown voltage of a p-n junction:
For a negative feedback amplifier as shown in the figure, the type of feedback present in the circuit is
A voltage follower is as shown in figure. Given that the open loop gain of an op-amp (A = 99), then what is the value of the output voltage \(V_o\). Assume that the op-amp is ideal except that it is having a finite open loop gain.
The average value of a half wave rectified sinusoidal voltage with peak amplitude 10 Volts is
In a common emitter amplifier, which one of the following statement is TRUE?
Which of the following statement is incorrect in a series-series feedback?
The capacitance, in force-current analogy, is analogous to
The gain margin of a system can be determined from the gain at
Phase margin of a system is used to specify which of the following?
For overdamped systems, the closed loop poles are
A thermistor has a resistance of \(10 k\Omega\) at \(25°C\) and \(1 k\Omega\) at \(100°C\). The range of operation of is \(0°C\) to \(150°C\). The excitation voltage is \(5V\) and a series resistance of \(1 k\Omega\) is connected to the thermistor. The power dissipated in the thermistor is
Thermoelectric cooler works on the principle of
A resistance potentiometer is:
The minimum value of input which is necessary to cause a detectable change from zero output is called:
A strain gauge has a nominal resistance of \(600\ \Omega\) and a gauge factor of 2.5. The strain gauge is connected in a DC bridge with three other resistances of \(600\ \Omega\) each. The bridge is excited by a \(4 V\) battery. If the strain gauge is subjected to a strain of \(1\ \mu m/m\), the magnitude of the bridge output will be
A resistance potentiometer has a total resistance of \(10000\ \Omega\) and is rated \(4 W\). If the range of the potentiometer is \(0\) to \(100 mm\), then its sensitivity in \(V/mm\) is:
A Pirani gauge measures vacuum pressure and works on the principle of
A McLeod gauge having volume of bulbs and mercury capillary, \(V = 100 \times 10^{-6} m^3\) and the diameter of measuring capillary is \(1 mm\). For the reading of \(60 mm\), the pressure will be
The devices which are used for the measurement of very high temperature are
For the two-port network shown in figure, The voltages and currents are given by a relation \(V_1 = 2 I_1 + I_2\) and \(V_2 = I_1 + I_2\). The admittance matrix \([Y]\) of this network is
Given the initial voltage in a capacitor C is \(V_C(0) = 5V\), \(R=10 K\Omega\) and \(C=1\ \mu F\). For the network shown in the figure, the value of \(V_C(t)\) at time \(t=\infty\) is:
The transfer function of the circuit as shown in the figure is expressed as
The derivative of a parabolic function becomes
If the phase margin of a system is zero degrees, then the system is
If the open loop transfer function of a system is \(G(s)H(s) = \frac{K(s+1)}{s(s+3)(s+4)}\) then its centroid is:
Which one of the following statements is True?
For critically damped system, the value of the damping ratio \(\zeta\) is:
A Bode plot of a transfer function G(s) is shown in the figure. The gain 'A' in dB at frequency f = 100Hz is:
If the negative feedback system is marginally stable, then the location of closed loop poles will be
A unit step input is applied to the negative feedback system whose closed loop transfer function is \(\frac{63}{S^2 + 4.8S + 9}\), then the steady state value of the output is
The minimum number of NOR gates required to implement A(A+B)(A+B+C) is equal to
Which has the highest fan-out?
Identify the logic gate family, which is slowest among the given logic?
The advantage of using dual slope ADC in a digital voltmeter is that
A 10-bit A/D converter is used to digitize an analog voltage signal in \(0 - 5V\) range. The maximum peak to peak ripple voltage that can be allowed in DC voltage is
What is size of bit addressable memory in 8051 microcontroller?
How many special function registers are there in 8051 microcontroller?
The number of comparators required in an 8-bit flash-type A/D converter is
The logic circuit shown in the figure is
A digital voltmeter uses a 10MHz clock and has a voltage controlled generator which provides a width of \(10\mu s\) per volt of unit signal. 10V of input signal would corresponds to a pulse count of
The period of signal \(x(t) = 10\sin 5t - 4\cos 9t\) is
The Fourier transform of signal \(\delta(t+1) + \delta(t-1)\) is
The output of two digital filters can be added or the same effect can be achieved by
Which of the following pulse modulation is analog?
The root mean squared value of \(x(t) = 3 + 2\sin(t)\cos(2t)\) is
A PLL can be used to modulate
The full scale deflection current of an ammeter is 1mA and its internal resistance is \(100\Omega\). If this meter is to have full deflection of 5A, what is the value of the shunt resistance to be used?
Low resistance is measured by
X and Y plates of a CRO are connected to unequal voltages of equal frequency with phase of \(90^\circ\). The Lissajous figure on the screen will be
The Fourier transform of the continuous time signal \(x(t)\) as shown in the figure is
The z-transform of the discrete time signal \(x(n) = u(-n)\) is
The z-transform of the discrete time signal \(x(n) = u(n) * u(n)\) with '\(*\)' being convolution is
If DTFT of \(x_1(n)\) is \(X_1(\omega)\), then the DTFT of the signal \(x_2(n) = nx_1(n)\) is
In order to compute an N-point DFT, the number of complex multiplications and complex additions required respectively are
The initial contents of the 4-bit Serial in parallel out, right shift, shift register shown in figure is 0101. After three clock pulses, the contents of the shift register will be
Minimum number of comparators required to implement 6-bit flash ADC
Minimum number of 2-input NAND gates required to implement XOR is
Which logic family has lowest power dissipation?
The 8-bit signed 2's complement representation of -26 is
A spectrophotometer is used to measure the concentration of a molecule in a solution based on Beer's law using cuvette of path length 10mm and detectable absorbance of 0.01. The molar absorptivity of the solution is \(10^4\) l/mol-m. The minimum concentration of the solution that can be detected is
An experiment was carried out twice using magnetic deflection type mass-spectrometer to estimate a certain molecule present in the compound under test. In the first test, the sample was excited and the potential difference between the accelerating plate was kept at 1000 V and in the second case, the potential difference was at 10000 V. Determine the ratio of the radius of curvature of the circular path travelled by the ions when they pass through the magnetic field oriented right angle to their motion in the test to that of the second
X-ray electromagnetic radiation lies in the range
In a spectrophotometer, the monochromator must be able to resolve two wavelengths 599.0nm and 600.1nm. The required resolution is
Light appears to travel in straight lines, since
The Refractive Index (RI) of the glass and water is 1.5 and 1.33 respectively. If the glass is immersed in water, its refractive index is
Find the distance between two successive position of the movable mirror of the Michelson interferometer giving best fringes in the case of sodium source with lines of \(\lambda=5890A^\circ\) and \(5896A^\circ\)
Which of the following type of image is produced by a CT scan machine?
In an electromagnetic blood flow meter, the induced voltage is directly proportional to the
Cardiac output is
For a blood sample, 15 g of Hb is present per deciliter (dl) of the blood and there are 5 x 1012 RBC's per liter of the blood. The mean cell haemoglobin is
A step index fibre has core diameter 40\(\mu\)m with core refractive index of 1.3 and numerical aperture 0.5, then the refractive index of cladding is
Optical sensors used for the displacement measurement works on the principle:
The ionization gauge is an instrument used for the measurement of
The displacement measuring instruments is
What is the output of a thermocouple?
Which of the following instruments indicate the instantaneous value of the electrical quantity being measured at the time at which it is being measured?
Feed forward control can be used only:
A pneumatic actuator converts:
I/P Converter converts:
If Proportional band(PB) increases then, \(K_p\)
Principle of radiation pyrometer is based on
Load cells are used for the measurement of
PH meter has
Which is the most suitable instrument to calibrate the pressure gauges?
Which thermocouple can be used to measure \(1500^{\circ}C\) temperature?
PPG is used to measure
Zirconia analyzer is used to measure
Which device is used to isolate the radiation of the desired wavelength from wavelength of the continuous spectra?
What is the principle of IR spectroscopy?
To avoid cavitation the valve should be designed such that
Principal advantage of hydraulic system over electric system is
Proportional band of an ON--OFF controller is
The error signal produced in a control system is constant. The output of derivative action will be
Which of the following devices is not needed in measurement of velocity of rolled bars in a rolling mill?
For measurement of mutual inductance we can use
To measure radio frequency, the suitable frequency meter is
Which of the following signals are generated by Wien-bridge oscillators?
The conductivity of the intrinsic semiconductor at absolute temperature is
An equal percentage valve has
Process reaction curve method of tuning is done for a system in
The number of values of \(k\) for which the following system of linear equations: \[ \begin{pmatrix} 4 & k & 2 \\
k & 4 & 1 \\
2 & 2 & 1 \end{pmatrix} \begin{pmatrix} x \\
y \\
z \end{pmatrix} = \begin{pmatrix} 0 \\
0 \\
0 \end{pmatrix} \]
possess a non-zero solution, is _______
Let \(A\) be a \(2 \times 2\) matrix such that \(trace(A) = \det(A) = a (a \neq 0)\). Then the trace of \(A^{-1}\) is
The value of \(\int_0^{\infty} \int_0^{\infty} e^{-(x^2+y^2)} dx dy\) is
A unit vector which is perpendicular to the surface of the paraboloid of revolution \(z = x^2 + y^2\) at the point (1,2,5) is
A function \(y(x)\) such that \(y(0) = 1\) and \(y(1) = 4e\) is a solution of the differential equation \(\frac{d^2y}{dx^2} - 2\frac{dy}{dx} + y = 0\). Then, \(y(2)\) is equal to _______
If \(y(x) = C_1 \cos 2x + C_2 \sin 2x + A(x) \log (\sec 2x + \tan 2x)\) is the general solution of the differential equation \(\frac{d^2y}{dx^2} + 4y = \tan 2x\), then \(A(x) = \_\_\_\_\_\_\_\)
The residue of \(f(z) = e^{-1/z}\) at \(z = 0\) is
If \(A\) and \(B\) are two events of a random experiment such that \(P(\bar{A}) = 0.3\), \(P(B) = 0.4\) and \(P(A \cap \bar{B}) = 0.5\), then \(P(A \cup B) = \_\_\_\_\_\_\_\)
The variance of the Binomial distribution with probability mass function \(p(x) = {}^{15}C_x \left(\frac{2}{3}\right)^x \left(\frac{1}{3}\right)^{15-x}\), \(x = 0,1,\dots,15\), is _______
To find the root of the equation \(f(x) \equiv e^{-x} - x = 0\), the Newton-Raphson method is used. If the initial guess for the root is 1, then the estimate of the root after first iteration is _______
AP PGECET 2026 Instrumentation Engineering Topic-wise weightage
| Major Subject | Approx. Number of Questions | Expected % (Approx.) |
|---|---|---|
| Engineering Mathematics | 16–20 | 13–17% |
| Basics of Circuits & Measurement Systems | 12–16 | 10–13% |
| Transducers & Mechanical Measurement | 16–20 | 13–17% |
| Analog Electronics | 10–14 | 8–12% |
| Digital Electronics | 10–14 | 8–12% |
| Signals, Systems & Communications | 10–14 | 8–12% |
| Electrical & Electronic Measurements | 10–14 | 8–12% |
| Control Systems & Process Control | 10–14 | 8–12% |
| Analytical, Optical & Biomedical Instrumentation | 10–14 | 8–12% |
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