GATE Agricultural Engineering
In an experimental setup, the discharge through a triangular notch is 0.0074 m3 s-1 at an operating head of 0.1 m. The coefficient of discharge for the notch is 0.7. If the required discharge is 0.1 m3 s-1 the corresponding width of water surface in m is
In a screen separator, the mass flow rates of feed, overflow and underflow are 150, 140 and 10 kg h-1,respectively.
Mass fraction of material in the feed and overflow are 0.9 and 0.96,respectively.
The effectiveness of separation in percentage is
The work index of a material is 6.25. If 80% of the feed and 80% of the product pass through IS Sieve No. 340
(3.25 mm opening) and IS Sieve No. 40 (0.42 mm opening), respectively, the power consumed in kW to crush 5000 kg h-1 of sorghum is
A rotary dryer is used to dry 1200 kg h-1 of paddy containing 30% moisture (wet basis) to give a product containing 15% moisture (wet basis). Alternately, a portion of the dry product may be recycled and mixed with the fresh feed such that the mixed feed enters the dryer with moisture content of 20% (wet basis). The moisture evaporation rate without recycle and the paddy recycle rate in kg h-1 respectively in the dryer are
211.76 and 600
256.5 and 600
256.5 and 2400
211.76 and 2400
A 100 ha watershed received rainfall at a rate of 5 cm h-1 for 2hours.
If the runoff generated by the storm was at the rate of 1 m3 s-1 for 10 hours, the runoff coefficient for the watershed would be
3.6 * 10-3
6.0 * 10-2
A 4-cylinder, 4-stroke compression ignition engine has piston stroke of 10.5 cm and cylinder bore of 11 cm. At a mean piston speed of 7 m s-1, the developed brake mean effective pressure is 650kPa.
The brake power in kW developed by the engine is
The overall heat transfer coefficient based on the outside surface area of a tubular heat exchanger decreased due to fouling during operation from 1000 W m-2 K-1 to 800 m-2 K-1. The fouling film coefficient of the heat exchanger in m-2 K-1 is _______________
f(x) = e-x2 for x = 1.1, 1.2, 1.3, 1.4 and 1.5, the value of by Simpson’s 1/3rd rule is ______
0.03 to 0.04
0.10 to 0.11
0.08 to 0.09
0.16 to 0.17
A cold storage chamber is constructed with 10 mm mortar, 200 mm brick, 100 mm insulation and 5 mm wood-board having thermal conductivities of 0.8, 1.5, 0.025 and 0.2 W m-1 K-1,respectively.
The resistance of 4 K m-1 W-1 is offered by
Slope and intercept of the BET equation relating [aw/x
(1 - aw)] and aw, where aw is water activity and x is the moisture content on dry basis, are 18 and 2,respectively.
The values of thermodynamic constant C and BET monolayer moisture content xm(%) are respectively
40 and 20
30 and 15
10 and 5
20 and 10
The equation representing the heat of respiration (q) of fruits and vegetables as a function of temperature (θ) with positive constants a and b is
q = a + bθ
q = ae-bθ
q = a ln(bθ)
q = aebθ
Milk enters into the heating section of a high temperature short time (HTST) pasteurization plant at a temperature of 45ºC and leaves at 72ºC. Hot water at temperature of 95 ºC enters countercurrently into the heat exchanger and leaves at 77ºC. The effectiveness of the heat exchanger is
The Rational method is used to estimate
direct surface runoff
peak runoff rate
The pressure that does not have any measurable influence on the void ratio or shearing resistance of the soil mass is
pore water pressure
Poisson distribution having a mean of 5 will have √5 as
The general solution of the differential equation d2y/dx2 -3 dy/dx - 4y = 0 is
Ae-x + Be4x
Ae-x + Be-4x
Aex + Be-4x
In the early nineteenth century, theories of social evolution were inspired less by Biology than by the conviction of social scientists that there was a growing improvement in socialinstitutions.
Progress was taken for granted and social scientists attempted to discover its laws andphases.
Which one of the following inferences may be drawn with the greatest accuracy from the above passage? Social scientists
emphasized Biology over Social Sciences.
did not question that progress was a fact.
did not approve of Biology.
framed the laws of progress.
A single effect vacuum evaporator has 100 tubes of 25 mmdiameter.
One thousand kg feed of milk per hour with 15% TS is concentrated to 20% TS in theevaporator.
Film heat transfer coefficients on either sides of the tube are 5000 and 800 W m2 K-1. Thermal conductivity of 1.5 mm thick SS tubes is 15 W m-1 K-1. Latent heat of vapourization under vacuum is 2309 kJ kg-1. For 100C temperature difference across the tube wall, the height of each tube, in m is
A trapezoidal canal, having a bottom width of 5.0 m and a side slope of 1 H : 1 V, is carrying a discharge of 20 m3 s-1. The critical depth, in m, is
A regime channel carrying a discharge of 25 m3 s-1 is designed using Lacey’s regimetheory.
The side slope of the channel is ½ H : 1 V, and Lacey’s silt factor isunity.
The bottom width and depth of flow in the channel, in m, respectively are
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International Fund for Agricultural Development
Effects of Modern Agricultural Practices
Adverse Effect of Modern Agricultural Practices
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