List of top Farm Power Questions

Two cylindrical reservoirs 'A' and 'B' are connected by a 30 m long pipe of 250 mm internal diameter as shown. Darcy friction factor for the pipe is 0.025. Initially reservoir 'A' was full and reservoir 'B' was empty. Neglecting entrance and exit losses, find the time required to empty reservoir 'A' in hours (rounded off to 3 decimal places). \begin{center} \includegraphics[width=0.5\textwidth]{03.jpeg} \end{center}
A 10 m pipe carries peak discharge = 1 m\(^3\)/s, head = 4 m, entrance loss coefficient = 0.5, friction loss coefficient = 0.02. Find neutral slope of water level in %.
Discharge from centrifugal pump at 1000 rpm with head = 30 m is 300 L/min. Efficiency = 65%. If speed increases to 1200 rpm, find power required.
The apparent wall shear stress in a 0.6 m long pipe line carrying refined oil is 12.5 Pa. If the pressure drop along the length is 300 Pa and flow rate is 0.25 m\(^3\)/s, the absolute viscosity of oil in \(10^{-3}\) Pa·s is \underline{\hspace{3cm}}.
A solar photovoltaic system receives radiations between 400–750 W/m\(^2\). Efficiency = 14%. Cell parameters: \(V_{oc} = 21.6 \, V\), \(I_{sc} = 3.22 \, A\), fill factor = 0.72. Find minimum cell area required to generate 10 kW power.
The ordinates of a 6-hour S-hydrograph of a catchment are given in the table. The catchment has phi-index of 0.25 cm h\(^{-1}\) and baseflow of 10.5 m\(^3\)/s. The peak of the flood hydrograph generated from this catchment due to a storm of 45 mm received during the first 6 h in m\(^3\)/s is: \[ \begin{array}{|c|c|} \hline \text{Time (h)} & 0 6 12 18 24 30 36 42 48
\hline \text{Ordinate (m}^3/s\text{)} & 0 30 90 180 252 306 342 360 360
\hline \end{array} \]
Match the Columns: \[ \begin{array}{|c|c|} \hline I & II
\hline 1. \; \text{Tensiometer} & a. \; \text{Consumptive use}
2. \; \text{Piezometer} & b. \; \text{Bernoulli's equation}
3. \; \text{Lysimeter} & c. \; \text{Soil moisture}
4. \; \text{Elbow meter} & d. \; \text{Hydrostatic pressure}
5. \; \text{Pitot tube} & e. \; \text{Volumetric flow rate}
\hline \end{array} \]
The information needed for estimating the design flood using Rational formula is:
A single cylinder four-stroke diesel engine has an engine displacement volume of 9 L, the engine rotates at 2400 rpm and its volumetric efficiency is 88%. The actual air inducted into the cylinder in m$^3$ s$^{-1}$ is _____.
In an effort to conserve energy, a grain dryer is being modified to reuse a part (10 m\(^3\) s\(^{-1}\)) of the exhaust airflow at 70°C and 30% relative humidity. This part of exhaust is mixed with 20 m\(^3\) s\(^{-1}\) of ambient air at 30°C and 60% relative humidity. The details of the two air-stream conditions are given below.
A trapezoidal weir has a side slope of 1 horizontal unit to 4 vertical units. The length of the weir is less than the width of the channel. If the head over the weir is 70 cm and the discharge is 0.85 m\(^3\) s\(^{-1}\), the length of the weir in m is _____. \textit{[Round off to two decimal places.]}
A watershed with various land uses (as specified in the table below) receives a rainfall of 152.4 mm. If an initial abstraction (I$_a$) is 0.2 times the potential maximum retention (S), and the antecedent moisture content (AMC) of averaged condition is assumed, the depth of runoff volume in mm is _____. \textit{[Round off to two decimal places]}
A two-wheel drive tractor is fitted with driving wheels having rolling radius of 860 mm. The effective gear ratio between the engine to the drive wheels is 98:1 and the power transmission efficiency at that gear ratio is 86%. If the engine torque is 520 N m, the ground thrust developed by the drive wheels in kN is _____.
The lowest temperature at which the fuel ceases to flow is known as __________.
In a tyre axis system as defined by Society of Automotive Engineers, the moment acting about z-axis is called
A horizontal axis lift type wind rotor of diameter 4 m is used to pump water at a wind velocity of 15 km/h at standard atmospheric pressure and temperature (density of air is 1.23 kg/m\(^3\)). If velocity of wind leaving the rotor blade is reduced to one-third of the approaching wind velocity, the thrust acting on the blade of the wind rotor in N is \(\underline{\hspace{1cm}}\) (round off to two decimal places).
Tractor weight = 20 kN, sandy soil, 26.5° angle of internal friction. Weight distribution at front and rear axles = 35% and 65%. An extra 2.5 kN is added to rear wheels. Find the change in maximum thrust in percentage.
The current in A that can be supplied by the two panels at the maximum power output is
Stoichiometric air–fuel ratio = 14.7:1. Equivalence ratio λ = 0.92. Find actual air–fuel ratio (round to 2 decimals).