List of top Farm Machinery Questions

A mouldboard plough is operated by a 2WD tractor with 6.0 kN pull. The ratio of lateral component to the longitudinal component of soil forces is 0.30, and the ratio of the vertical component to the longitudinal component of soil forces is 0.50. If the diameter of the driving wheels is 1.2 m and the rear axle rotates at 10 rpm, the drawbar power produced at 20% wheel slip is _________ kW. (Rounded off to 2 decimal places)
The height of the CG of a 4WD tractor with equal tread (1.25 m) in front and rear is 0.85 m. The tractor overturns during turning at a speed of 18 km.h\(^{-1}\). Neglecting the frictional forces on the tractor wheels, the turning radius is _________ m. (Rounded off to 2 decimal places)
An engine’s torque-speed characteristics is given below:

\( T_{{\text{maxP}}} = 125 \, \text{N.m}, \, N_{{\text{maxP}}} = 2400 \, \text{rpm}, \, N_{{\text{HI}}} = 2600 \, \text{rpm}, \, T_{{\text{max}}} = 160 \, \text{N.m}, \, N_{{\text{maxT}}} = 1450 \, \text{rpm} \)

Where:

\( T_{{\text{maxP}}} = \text{torque at maximum power}, \quad T_{{\text{max}}} = \text{maximum torque}, \quad N_{{\text{maxP}}} = \text{speed at maximum power}, \quad N_{{\text{maxT}}} = \text{speed at maximum torque}, \quad N_{{\text{HI}}} = \text{speed at high idle}. \)

The Governor’s regulation is _________% (Rounded off to 2 decimal places).
Considering acceleration due to gravity as 9.81 m.s\(^{-2}\) and \( \pi \) as 3.14, the critical speed of a ball mill having 3600 mm mill diameter and 160 mm ball diameter is _________ rpm. (Answer in integer)
Front wheel pivot points of a 2WD tractor are 1.2 m apart. When making turn on a flat concrete surface, the inner front wheel makes 50$^\circ$ and the outer front wheel makes 35$^\circ$ steering angles. To ensure turning without front wheel skid, the wheel base of the tractor should be _________ m. (Rounded off to 2 decimal places)
The nominal radius of the rear wheels of a 2WD tractor is 0.5 m. The rolling radius of the tire is 6% less than the nominal radius. While conducting a field test, if the actual distance covered for 20 revolutions of the rear wheel is found to be 56 m, the rear wheel slip is _________% (Rounded off to 2 decimal places).
While studying vertical motion imparted to the base of tractor seat, \( \theta \) (radian) is considered as rotation about tractor’s CG and \( R \) is considered as longitudinal distance from operator’s seat to the tractor’s CG. For a small value of \( \theta \), the term ‘\( R\theta \)’ represents the vertical motion resulting from tractor’s _________
Identify the correct statement related to tape correction in chain surveying:
A solid round uniform diameter shaft is transmitting 25 kW power at 540 rpm. The maximum allowable shear stress of the shaft material is 35 MPa. If the maximum torque exceeds the mean torque by 20%, neglecting the bending effect, the minimum shaft diameter is _________ mm. (Rounded off to 2 decimal places)
A stable drop structure is designed with a base length of 5.7 m. The sum of vertical forces excluding uplift is 92.5 kN, sum of uplift forces is 72.5 kN, and sum of moments of all the horizontal and vertical forces about an axis passing through mid-section of base length is 60 kN.m. The eccentricity denoting the longitudinal distance between the centroid of base area and the point of application of resultant vertical load is _________ m. (Rounded off to 2 decimal places)