Agricultural Engineering Gate 2014 Questions with Answer

Ques 14 GATE 2014

A knapsack sprayer is provided with a nozzle having rated delivery of 0.5 L min-1 at a pressure of 270 kPa. For a pressure setting of 210 kPa, the application rate per unit orifice area is 0.24 L cm-2 s-1. If the coefficient of discharge of the nozzle is 0.75, the diameter of the nozzle orifice in mm is

Ques 15 GATE 2014

A cultivator with a working width of 1.2 m utilizes 95% of its width due to overlapping while operating at a forward speed of 2 km h-1. If the time lost in turning and other interruptions is 50 minutes per hectare, the field efficiency of the cultivator in percent is

Ques 16 GATE 2014

A two-row horizontal plate potato planter with 0.6 m ridge spacing has 9 cups on each seed plate of 0.4 m diameter. For each revolution of the ground wheel, the seed plate makes half a revolution. The diameter of the ground wheel is 0.5 m. If the planter uses cut tubers each of 25 g mass, the seed rate in kg ha-1 is ____________.

Ques 17 GATE 2014

The brake power of a four-cylinder engine is 30 kW with all cylinders firing and 20 kW with any one cylinder cut. The mechanical efficiency of the engine in percent is

Ques 18 GATE 2014

A tractor is provided with an Ackerman steering gear mechanism. If b is the wheel base, c the distance between the front wheel pivot points, θ the steering angle of the inner wheel and φ the steering angle of the outer wheel, the fundamental relationship to be satisfied to avoid skidding of the two front wheels during a turn is given by

Ques 19 GATE 2014

The pitch of the chain used in a chain drive motion is 38 mm. If the number of teeth on one of the sprockets is 35, the pitch circle diameter of the sprocket in m is_________.

Ques 20 GATE 2014

A tractor tyre contains 31 L of air at a pressure of 190 kPa and a temperature of 30°C. Using R=8.314 J (gmol)-1 K-1 and molecular mass of air = 29 g (gmol)-1, the mass of air contained in the tyre is M × 10-3 kg. The value of M is________.

Ques 21 GATE 2014

A flywheel and clutch assembly weighs 200 N and has a radius of gyration 150 mm. If the engine speed is 3000 rpm, the kinetic energy possessed by the rotating assembly in kJ is_______.

Ques 22 GATE 2014

A four-stroke, four-cylinder diesel engine running at 2000 rpm develops brake power of 60 kW and the fuel consumption is 0.30 kg kW-1 h-1. The engine has a bore of 120 mm and stroke of 100 mm. If air-fuel ratio is 15:1 and air density is 1.15 kg m-3, the volumetric efficiency of the engine in percent is

Ques 23 GATE 2014

A four-wheel-drive tractor has a static weight of 50 kN with 40% weight on rear axle and 60% on front axle. The wheel base is 2 m. The tractor is pulling a disc harrow that exerts a level drawbar pull at a hitch height of 0.5 m from the ground. During the operation, when the dynamic reaction on each axle is same, the dynamic traction ratio developed by the tractor is

Ques 24 GATE 2014

A tractor gear box has 8 forward speeds. The speed ratios (number of engine revolutions for one revolution of driving wheel) vary in exact geometrical progression. If the speed ratios in highest and lowest gears are 14.9 and 108.8, respectively, the geometric constant is ___________.

Ques 25 GATE 2014

A multi-disc clutch has 4 steel discs and 3 bronze discs. The outside and inside diameters of contact surfaces are 250 mm and 180 mm, respectively. The coefficient of friction is 0.3 and axial force is 400 N. Assuming uniform wear, the power in kW that the clutch can transmit at 1000 rpm is _____.

Ques 26 GATE 2014

A hydraulic circuit uses a pump having a fixed displacement volume of 12.5 cm3 rev-1 driven at 1500 rpm. The pump has a volumetric efficiency of 85% and an overall efficiency of 75%. If the system pressure is set at 15 MPa by the relief valve, the power required to drive the pump in kW will be