Farm Machinery Training & Testing Institutes (Budni, Hisar, Anantapur, Biswanath Chariali) · India · Ministry of Agriculture & Farmers Welfare, Government of India
Original practice questions written to the published syllabus · not past papersEverything between the engine and the implement: clutch, gearbox, differential, PTO, brakes, steering, hydraulics, hitch and tyres.
In the exams: GATE AG Section 3 Tractors and Power Tillers; ICAR AIEEA-PG Unit V; ICAR AICE subject 39 Unit 4; ASRB NET FMP; PRC ABE
How our questions for Farm Machinery Training & Testing Institutes spread across the units of Tractor Systems & Controls. Difficulty: 9 easy, 13 medium, 1 hard.
| Operator controls and ROPS | 3 | |
| Hydraulic system: open and closed centre | 2 | |
| Tyres and ballasting | 2 | |
| Differential and differential lock | 2 | |
| Clutch: single and dual plate | 2 | |
| Power take-off: standards and speeds | 2 | |
| Brakes | 2 | |
| Three-point hitch: categories, free and restrained links | 2 | |
| Power tillers | 2 | |
| Tractor types and selection | 1 | |
| Gearbox and transmission: sliding, constant and synchromesh | 1 | |
| CVT and power-shift transmissions | 1 | |
| Draft and position control | 1 |
Choose an answer, then open the working. Each explanation says why the right answer is right and why the others are not.
An operator holds a tractor's open-centre hydraulic lever against the stop after the cylinder has reached the end of its stroke. The gear pump delivers 30 L/min and the relief valve is set at 17.5 MPa. The rate of heat generation in the oil is
D. 8.75 kW
All the flow passes over the relief valve and does no work, so heat = Δp × Q = 17.5 MPa × 30 L/min/60 = 8.75 kW. /600 applies to bar, not MPa. This is why levers must not be held against the relief valve and why open-centre systems overheat when misused.
Each rear tyre of a tractor has an internal volume of 400 L. Both are filled to the usual 75% with a ballast solution of density 1.2 kg/L. The added mass is
C. 720 kg
Mass = 2 tyres × 400 L × 0.75 × 1.2 kg/L = 720 kg. 360 kg is one tyre; 960 kg assumes a full tyre, which leaves no air cushion; 600 kg assumes plain water.
Gear clash when shifting a sliding-mesh gearbox on a moving tractor happens because
D. the gears to be meshed are turning at different speeds
Teeth can mesh cleanly only when their pitch-line speeds match. Sliding-mesh boxes have no synchroniser, so they need the tractor stopped or double-declutching.
A tractor pulls to the right under road braking with the pedals latched. The most probable cause is
C. unequal brake adjustment or oil-contaminated linings on the left
If the right brake grips harder than the left, the tractor swings right. Unequal free travel or loss of friction on the left side (oil from a leaking seal) is the usual cause.
Steel cage wheels are fitted to a power tiller for
C. wet paddy fields
Cage wheels sink into the mud and give traction where rubber tyres slip; they are removed for road work. They are used for puddling and other wet-field work.
The most common way a tractor overturns backwards is when
C. the rear wheels are held and axle torque rotates the tractor about them, or a load is hitched high
When the wheels cannot turn, drive torque lifts the front; with a high hitch the pull adds to this moment. Rearward overturns happen in a second or two.
Ten here, 23 in the app. The Laisha app has every practice question we have written to Farm Machinery Training & Testing Institutes in this subject, marked as you go, with timed papers, a jump-to-unanswered list and a certificate when you pass at 70 per cent.
Free for ten days, then one subscription of US$10 a month. We would rather say so here than have you find it later.
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