GATE Agricultural Engineering Practice Quiz

Question 1

A tractor-drawn mouldboard plough operates at a speed of $5\ \text{km h}^{-1}$ with an effective cutting width of $1.2\ \text{m}$. If the field efficiency is $75\%$, the effective field capacity is closest to

Accepted Answer

$0.45\ \text{ha h}^{-1}$

Question 2

In a centrifugal pump used for irrigation, the manometric head is $25\ \text{m}$, discharge is $20\ \text{L s}^{-1}$, and overall efficiency is $70\%$. Taking $\rho=1000\ \text{kg m}^{-3}$ and $g=9.81\ \text{m s}^{-2}$, the input power required is closest to

Accepted Answer

$7.0\ \text{kW}$

Question 3

A soil sample has a bulk density of $1.35\ \text{Mg m}^{-3}$ and particle density of $2.65\ \text{Mg m}^{-3}$. The porosity of the soil is approximately

Accepted Answer

$49\%$

Question 4

A rectangular channel carries irrigation water at a discharge of $0.60\ \text{m}^3\text{s}^{-1}$. The channel bed width is $1.0\ \text{m}$, flow depth is $0.5\ \text{m}$, and bed slope is $0.0004$. The Manning roughness coefficient is closest to

Accepted Answer

$0.012$

Question 5

For a horizontal soil column of length $0.50\ \text{m}$, cross-sectional area $0.01\ \text{m}^2$, and saturated hydraulic conductivity $2\times 10^{-5}\ \text{m s}^{-1}$, a constant head difference of $0.20\ \text{m}$ is maintained across the column. The steady discharge through the soil column is

Accepted Answer

$8\times 10^{-8}\ \text{m}^3\text{s}^{-1}$

GATE Agricultural Engineering

Practice Quizzes

GATE Agricultural Engineering Practice Quiz

Soil Texture Classification Fundamentals | GATE Agricultural Engineering