GATE 2023 CH – Previous Year Questions with Solutions
All 65 questions of GATE 2023 CH with answers and explanations. Read each question, then practise it by topic or as a full paper.
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- Question 1 – "You are delaying the completion of the task. Send contributions at the earliest."
- Question 2 – References : : : Guidelines : Implement (By word meaning)
- Question 3 – In the given figure, PQRS is a parallelogram with PS = 7 cm, PT = 4 cm and PV = 5 cm. What is the length of RS in cm? (The diagram is representative.)
- Question 4 – In 2022, June Huh was awarded the Fields medal, which is the highest prize in Mathematics. When he was younger, he was also a poet. He did not win any…
- Question 5 – A line of symmetry is defined as a line that divides a figure into two parts in a way such that each part is a mirror image of the other part about…
- Question 6 – Human beings are one among many creatures that inhabit an imagined world. In this imagined world, some creatures are cruel. If in this imagined world,…
- Question 7 – To construct a wall, sand and cement are mixed in the ratio of 3:1. The cost of sand and that of cement are in the ratio of 1:2. If the total cost of…
- Question 8 – The World Bank has declared that it does not plan to offer new financing to Sri Lanka, which is battling its worst economic crisis in decades, until…
- Question 9 – The coefficient of x4 in the polynomial (x - 1)3(x - 2)3 is equal to .
- Question 10 – Which one of the following shapes can be used to tile (completely cover by repeating) a flat plane, extending to infinity in all directions, without…
- Question 11 – Which one of the following is the CORRECT value of y, as defined by the expression given below? y = x 02xex - 1
- Question 12 – The vector v is defined as v = zxi + 2xyj + 3yzk. Which one of the following is the CORRECT value of divergence of v, evaluated at the point (x, y, z)…
- Question 13 – Given that F = z 1 + z 2 z 1 + z 2 , where z 1 = 2 + 3i and z 2 = -2 + 3i with i = -1, which one of the following options is CORRECT?
- Question 14 – For a two-dimensional plane, the unit vectors, (e r, e ) of the polar coordinate system and (i, j) of the cartesian coordinate system, are related by…
- Question 15 – Which one of the following statements related to octane number is NOT correct?
- Question 16 – Which one of the following options represents the major components of oleum?
- Question 17 – For a reversible endothermic chemical reaction with constant heat of reaction over the operating temperature range, K is the thermodynamic equilibrium…
- Question 18 – Nitrile rubber is manufactured via polymerization process. Which one of the following options is the CORRECT pair of monomers used in this process?
- Question 19 – John and Jane independently performed a thermodynamic experiment, in which X and Y represent the initial and final thermodynamic states of the system,…
- Question 20 – For a packed-bed comprising of uniform-sized spherical particles of diameter D p, the pressure drop across the bed is given by the Kozeny-Carman…
- Question 21 – Match the quantities in Group 1 with their units in Group 2 listed in the table below. Group 1 Group 2 --- --- P) Thermal conductivity I) W m-2K-1 Q)…
- Question 22 – A slab of thickness L, as shown in the figure below, has cross-sectional area A and constant thermal conductivity k. T 1 and T 2 are the temperatures…
- Question 23 – Spray dryers have many advantages. Which one of the following is NOT an advantage of a typical spray dryer?
- Question 24 – Which one of the following quantities of a flowing fluid is measured using a rotameter?
- Question 25 – A liquid surge tank has F in and F out as the inlet and outlet flow rates respectively, as shown in the figure below. F out is proportional to the…
- Question 26 – A packed distillation column, with vapor having an average molecular weight of 45 kg kmol-1, density of 2 kg m-3 and a molar flow rate of 0.1 kmol…
- Question 27 – An isothermal jacketed continous stirred tank reactor (CSTR) operating at 150 °C is shown in the figure below. The cold feed entering the system at 30…
- Question 28 – Consider a system where a Carnot engine is operating between a source and a sink. Which of the following statements about this system is/are NOT…
- Question 29 – For a fully developed turbulent flow of an incompressible Newtonian fluid through a pipe of constant diameter, which of the following statements…
- Question 30 – Given that E (in W m-2) is the total hemispherical emissive power of a surface maintained at a certain temperature, which of the following statements…
- Question 31 – The position x(t) of a particle, at constant , is described by the equation d2xdt2 = -2x. The initial conditions are x(t = 0) = 1 and .dxdt t=0 = 0.…
- Question 32 – Burning of methane in a combustor yields carbon monoxide, carbon dioxide, and water vapor. Methane is fed to the combustor at 100 mol hr-1, of which…
- Question 33 – The viscosity of an incompressible Newtonian fluid is measured using a capillary tube of diameter 0.5 mm and length 1.5 m. The fluid flow is laminar,…
- Question 34 – A liquid L containing a dissolved gas S is stripped in a countercurrent operation using a pure carrier gas V. The liquid phase inlet and outlet mole…
- Question 35 – In a binary gas-liquid system, N A,EMD is the molar flux of a gas A for equimolar counter diffusion with a liquid B. N A,UMD is the molar flux of A…
- Question 36 – An exhibition was held in a hall on 15 August 2022 between 3 PM and 4 PM during which any person was allowed to enter only once. Visitors who entered…
- Question 37 – Simpson's one-third rule is used to estimate the definite integral I = -111 - x2\,dx with an interval length of 0.5. Which one of the following is the…
- Question 38 – Match the products in Group 1 with the manufacturing processes in Group 2 listed in the table below. Group 1 Group 2 --- --- P) Acetaldehyde I)…
- Question 39 – Match the reactions in Group 1 with the catalysts in Group 2 listed in the table below.
- Question 40 – Water in a container at 290 K is exposed to air containing 3% CO 2 by volume. Air behaves like an ideal gas and is maintained at 100 kPa pressure. The…
- Question 41 – The enthalpy (H, in J mol-1) of a binary liquid system at constant temperature and pressure is given as H = 40x 1 + 60x 2 + x 1x 2(4x 1 + 2x 2), where…
- Question 42 – Which one of the following represents the CORRECT effects of concentration polarization in a reverse osmosis process?
- Question 43 – CO and H 2 participate in a catalytic reaction. The partial pressures (in atm) of the reacting species CO and H 2 in the feed stream are p CO and p H…
- Question 44 – A cascade control strategy is shown in the figure below. The transfer function between the output (y) and the secondary disturbance (d 2) is defined…
- Question 45 – Level (h) in a steam boiler is controlled by manipulating the flow rate (F) of the make-up (fresh) water using a proportional (P) controller. The…
- Question 46 – Which of the following statements is/are CORRECT?
- Question 47 – If a matrix M is defined as M = bmatrix 10 & 6 \\ 6 & 10 bmatrix, the sum of all the eigenvalues of M3 is equal to (in integer).
- Question 48 – The first derivative of the function U(r) = 4[(1r)12 - (1r)6] evaluated at r = 1 is (in integer).
- Question 49 – Wet air containing 10 mole percent water vapor is dried by continuously passing it through a column of CaCl 2 pellets. The pellets remove 50 percent…
- Question 50 – Orsat analysis showing the composition (in mol %, on a dry basis) of a stack gas is given in the table below. The humidity measurement reveals that…
- Question 51 – A pump draws water (density = 1000 kg m-3) at a steady rate of 10 kg s-1. The pressures at the suction and discharge sides of the pump are −20 kPa…
- Question 52 – A cylindrical tank with a diameter of 500 mm contains water (density = 1 g cm-3) upto a height h. A 5 mm diameter round nozzle, whose center is 1 cm…
- Question 53 – A large tank is filled with water (density = 1 g cm-3) upto a height of 5 m. A 100 µm diameter solid spherical particle (density = 0.8 g cm-3) is…
- Question 54 – A fluid is flowing steadily under laminar conditions over a thin rectangular plate at temperature T s as shown in the figure below. The velocity and…
- Question 55 – A perfectly insulated, concentric tube countercurrent heat exchanger is used to cool lubricating oil using water as a coolant (see figure below). Oil…
- Question 56 – Partially saturated air at 1 bar and 50 °C is contacted with water in an adiabatic saturator. The air is cooled and humidified to saturation, and…
- Question 57 – Distillation of a non-reactive binary mixture with components A and B is carried out in a batch still as shown in the figure below. The initial charge…
- Question 58 – Fresh catalyst is loaded into a reactor before the start of the following catalytic reaction. A products The catalyst gets deactivated over time. The…
- Question 59 – A unimolecular, irreversible liquid-phase reaction A P was carried out in an ideal batch reactor at temperature T. The rate of the reaction (-r A)…
- Question 60 – An irreversible liquid-phase second-order reaction A k B with rate constant k = 0.2 liter mol-1min-1, is carried out in an isothermal non-ideal…
- Question 61 – The outlet concentration C A of a plug flow reactor (PFR) is controlled by manipulating the inlet concentration C A0. The following transfer function…
- Question 62 – The transfer function of a measuring instrument is G m(s) = 1.052s + 1(-s). At time t = 0, a step change of +1 unit is introduced in the input of this…
- Question 63 – A design engineer needs to purchase a membrane module (M) for a plant. Details about the two available options, M1 and M2, are given in the table…
- Question 64 – The purchase cost of a new distillation column is Rs. 10 lakhs with an installation factor of 5.8. The cost of the capital is to be annualized over a…
- Question 65 – Pumps A and B are being considered for purchase in a chemical plant. Cost details for these two pumps are given in the table below. The interest rate…