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GATE Agricultural Engineering
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GATE Agricultural Engineering
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A two-wheel drive tractor, while negotiating a terrain, indicates 100% slip of one of the rearwheels.
Under such a condition, the use of differential lock causes
equal power and equal torque distribution to both the drive wheels
equal speed and unequal power distribution to both the drive wheels
equal speed and equal power distribution to both the drive wheels
equal speed and equal torque distribution to both the drive wheels
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
2.62
2.12
1.09
1.18
In a semi-modular outlet, the discharge
depends upon the water levels of both distributary and water course
depends upon the water level in the distributary
depends upon the water level in the water course
is independent of water levels in the distributary and the water course
The gridiron pipe drainage system is more economical than the herringbone pipe drainage system because
the number of main or sub-main lines is reduced
the number of junctions and the double-drained area are reduced
it has only main or sub-main lines
it is adopted in the fields which do not require complete drainage
If the drainable porosity of a command area is 5% and the design rate of drop of the water table is 0.25 m day-1, the drainage coefficient of the command area in mm day-1 will be
1.25
0.0125
12.5
250
A piston pump is driven by a 5 m diameter horizontal axis wind turbine for supplying water from a borehole with a total pump head of 10 m. The mean velocity of air is 18 km h-1 and the density of air is 1.29 kg m-3. The actual power coefficient of the wind turbine is 0.30 and the overall pump efficiency is 60%. Neglecting the transmission losses, the expected pump discharge in L s-1 will be
2.90
5.80
28.50
32.27
All engineering students should learn mechanics, mathematics and how to docomputation.
I II III IV Which of the above underlined parts of the sentence is not appropriate
IV
II
I
III
A high pressure dairy homogenizer operates under upstream and downstream pressures of 200 and 40 bar respectively homogenizing 30 L of whole milk perhour.
Density and specific heat capacity of whole milk are 1030 kg m-3 and 3.8 kJ kg-1 K-1,respectively.
Assuming complete energy conservation, the temperature rise of whole milk in degree Celsius is _______________
2.4 to 2.6
3.2 to 3.4
4.7 to 4.9
4 to 4.2
The type of pump used in forced water cooling system of a tractor engine is
centrifugal
gear
vane
piston
The line y = x - 1 can be expressed in polar coordinates (r, θ) as
r = cos θ
r = sin θ
r(cos θ + sin θ) = 1
r(cos θ - sin θ) = 1
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
32.78, 1.56
20.26, 1.38
20.26, 1.56
23.75, 1.56
A pair of parallel glass panes, each of 3 mm thickness traps 2 mm layer of stagnantair.
Thermal conductivities of glass and air are 0.5 and 0.02 W m-1 K-1,respectively.
If the film heat transfer coefficient of air is 10 W m-2 K-2, then Biot Number is
0.06
0.04
1.50
1.00
The cumulative discharge of a tractor mounted hydraulic sprayer having 7 nozzles is 2.0 L min-1 when the tractor is operated at 4 km h-1. If the nozzle spacing is 0.3 m, the discharge in L ha-1 is
166.67
142.86
1000.02
285.72
A slider is moving on a straight link at a sliding velocity of 0.5 m s-1. The straight link is pivoted at one end and makes angular movement at a rate of 1.0 rad s-1 Coriolis acceleration of the slider in m s-1 is
4.00
0.25
0.50
1.00
The soil erodibility factor needs to be determined for use in the universal soil lossequation.
The length, in m and slope, in % of the experimental plot to be used for this purpose, respectively are
21, 11
22, 9
23, 8
19, 12
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 ln(bθ)
q = aebθ
q = ae-bθ
q = a + bθ
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
62
32
42
52
A packed bed of 480 kg solid particles having particle size of 0.15 mm and density of 800 kg m-3 is fluidized using air at 250C and 1 atmosphericpressure.
If the cross section of the empty bed is 0.45 m2 and voidage at minimum fluidizing condition is 0.5, then the minimum height of the fluidized bed, in m is
5.4
2.7
7.4
1.0
Velocity of an object fired directly in upward direction is given by V = 80 − 32 t, where t (time) is inseconds.
When will the velocity be between 32 m/sec and 64 m/sec
(1/2, 3/2)
(1, 3/2)
(1, 3)
(1/2, 1)
A tall silo having height to diameter ratio of 2 is holding 480 tons wheat of bulk density 960 kg m-3. The angle of internal friction for wheat is 250 and for wheat and wall surface is240.
Applying Airy formula, the maximum lateral pressure in kPa at the bottom of the bin section is
40.24
42.83
41.79
42.92
The Rational method is used to estimate
direct surface runoff
runoff volume
runoff depth
peak runoff rate
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
256.5 and 600
211.76 and 2400
211.76 and 600
256.5 and 2400
Work index in size reduction can be obtained by multiplying Bond’s energy constant with
√10
³√10
10
³√11
A soil has a void ratio of 0.75 and a specific gravity of 2.66. The value of critical hydraulic gradient at which quick sand condition will occur is
1.05
0.95
6.64
2.09
A watershed, with an area of 360 km2, has a triangular shaped 4-h unit hydrograph with a base of 50hours.
The peak discharge of direct runoff hydrograph due to 3 cm of rainfall-excess in 4 hours from the watershed in m3 s-1 is
120.00
160.00
13.33
14.00
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
172.96
86.48
39.40
43.24
The relationship between outflow Q in m3 s-1 and storage S in m3 for an emergency spillway in a reservoir is Q = S/4000.
Inflow, outflow and storage are assumed to be zero at time t = 0. If the inflow rate is 300 m3 s-1 at the end of t = 3 hours, the outflow rate in m3 s-1 is
152.84
184.84
172.34
164.84
A diesel engine running in dual fuel mode with diesel as pilot fuel and producer gas as primary fuel produces 3.5 kW at rated engine speed and is coupled directly to a generator for producingelectricity.
The amount of diesel and producer gas consumed per hour is 460 ml and 12.5 m3,respectively.
Assuming calorific value of diesel and producer gas as 35280 and 3.97 MJ m-3, respectively, the brake thermal efficiency of the engine in percentage is
17.19
19.13
25.32
22.79
During the testing of a spike-tooth type thresher for wheat crop, the throughput and the thresher capacity were found to be 750 kg h-1 and 445 kg h-1,respectively.
The grain-straw ratio (grain : straw) of the crop is 1.5 : 1. Material other than grain (MOG) collected at the main grain outlet is 5%. The total grain loss in percentage from all the sources will be
0.33
1.11
0.50
1.61
Soybean is to be planted with a precision planter that meters 54 seeds per revolution of the metering disc powered from a ground wheel of diameter 490 mm. The desired plant population is 44800 per ha with a row to row spacing of 0.75 m. The germination percentage is 84. The planter is to be operated at 2.5 km h-1 with a 10% skid of groundwheel.
The angular speed of ground wheel in rpm is
20.3
32.6
28.3
24.6
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