Agricultural Engineering Gate 2026 Questions with Answer

Ques 14 GATE 2026

A 8 × 20 cm seed drill has 0.60 m diameter ground wheel. On a hard-surface calibration stand, the drill delivers 814 g of seeds in 30 wheel revolutions. When operated in a field having soft soil, the wheel’s effective rolling circumference reduces by 4%. Neglecting other losses, the actual-field seed application rate (in kg.ha⁻¹) is ________. (Rounded off to two decimal places)
(Take π = 3.14)

Ques 15 GATE 2026

A tractor PTO shaft, through a spur-gear reduction, drives a small grain auger at 540 rpm. The driving gear on the PTO shaft has 0.18 m pitch circle diameter. The auger requires 3.5 kW, transmitted through this gear. Normal force along the line of action between the meshing teeth is 760 N. Assume involute spur gears, single tooth contact, and neglect friction. The pressure angle (in degrees) is ________.
(Rounded off to two decimal places)
(Take π = 3.14)

Ques 16 GATE 2026

Fuel property that predominantly governs "hard / cold starting" in SI engine is P; and the property that predominantly governs "ignition delay" in CI engine is Q.
Identify the correct option for P and Q combination

Ques 17 GATE 2026

A tractor engine delivers 382 N.m brake torque at a rated speed of 2000 rpm. The radiator cooling fan draws 5% of the engine brake power. The fan pushes 2.8 m³.s⁻¹ of air against 0.9 kPa static pressure rise. Assuming air as incompressible, and ignoring other losses, the fan efficiency, in %, is nearest to
(Take π = 3.14)

Ques 18 GATE 2026

A 2WD tractor’s driving axle experiences total dynamic normal load of 28 kN. The driving wheels have 0.60 m rolling radius. The total driving axle torque measured is 10.7 kN.m. At 18% wheel slip, the coefficient of net traction is 0.35. Tractive efficiency of the driving wheels, in %, is nearest to

Ques 19 GATE 2026

The RMS sound pressure is increased by 50%. This increases the sound pressure level, in dB, nearly by

Ques 20 GATE 2026

A four-cylinder four-stroke engine (100 mm bore and 120 mm stroke) runs at 1800 rpm mean speed with 0.9 MPa indicated mean effective pressure (IMEP). The flywheel constant (ratio of the energy fluctuation to the indicated work per crankshaft revolution) is 0.30. All other losses are neglected. For an allowable speed fluctuation of ±1% about the mean, the required flywheel mass moment of inertia (in kg.m²) is ________. (Rounded off to two decimal places)
(Take π = 3.14)

Ques 21 GATE 2026

A 2WD tractor has to develop 30 kN gross tractive force at the ground. Rolling radius of the rear-wheels is 0.73 m. Each rear-wheel is driven by a simple planetary final-drive in which sun gear (26 teeth) is input, ring gear (78 teeth) is fixed, and the carrier is bolted to rear-wheel hub. The sun-planet external mesh efficiency is 98.5%, while the planet-ring internal mesh efficiency is 99%. Losses upstream of the final-drive are neglected. The required sun-shaft input torque per rear-wheel (in kN.m) is ________. (Rounded off to two decimal places)

Ques 22 GATE 2026

A stationary Ackerman-steer tractor on dry, clean concrete surface carries 12 kN vertical load on each front steered wheel of 0.28 m nominal tyre width (b). Assume uniform pressure distribution on the circular tyre-print area having diameter b. Effective friction coefficient between tyre and surface is 0.30.
The steering is individually power-assisted by a single-rod hydraulic cylinder, acting through a pitman arm resulting in 60 mm effective moment arm. The hydraulic relief valve is set to 8 MPa, and the cylinder bore is 32 mm (ignore rod area). Neglect other losses. The maximum kingpin offset (in mm), which does not cause to exceed the maximum allowable kingpin torque is ________. (Rounded off to the nearest integer)
(Take π = 3.14)

Ques 23 GATE 2026

A circular mild steel storage bin of 8 m height contains wheat having bulk density of 800 kg.m⁻³. The coefficient of static friction between wheat grain and bin wall is 0.40 and hydraulic radius of the bin is 1 m. Equivalent diameter of the bin, in m, is

Ques 24 GATE 2026

Dimensionless parameter among the following options is

Ques 25 GATE 2026

It is given that the water activity of a food is equal to the relative humidity of the atmosphere that is in equilibrium with the food. The partial pressure of water vapour of the food at a specific temperature is

Ques 26 GATE 2026

Air carrying dust particles enters a cyclone separator of 800 mm diameter at a tangential velocity of 30 m.s⁻¹ near the wall. The average diameter of the dust particles is 100 µm. The separation factor is nearest to
(Take g = 9.81 m.s⁻²)