ITI Mechanic Tractor (AITT Theory) case studies
ITI Mechanic Tractor (AITT Theory) · Put your knowledge to work in context.
The ITI Mechanic Tractor (AITT Theory) examination is the theory paper of the All India Trade Test for the Mechanic Tractor trade, taken by trainees who have completed institutional training under the Craftsman Training Scheme. It is intended for apprentices and ITI trainees preparing to work as tractor service technicians, workshop mechanics, or farm-machinery maintenance staff, and it tests whether you can reason about a tractor as a complete machine rather than as isolated parts. The ITI Mechanic Tractor (AITT Theory) case studies are 5 cases and about 4,497 words.
1Overheating Tractor on a Loaded Haul
A 55 hp turbocharged four-cylinder tractor (2,800 h) is hauling a loaded trailer in 38 °C ambient. After 25 minutes at about 75 % load the coolant temperature reaches 105 °C and the warning lamp glows.
987 words, about 5 min2Three-Point Linkage Fails Under Load
A 45 hp tractor with a category II three-point linkage is used to carry an 850 kg mounted cultivator. The lift raises the empty linkage quickly, but with the cultivator attached it lifts only slowly and jerkily, and only when the engine is held at about 2,000 rpm.
913 words, about 5 min3Intermittent No-Crank on a 12 V Diesel Tractor
A 12 V diesel tractor uses a 75 Ah battery and a 2.5 kW reduction-gear starter. The owner reports that the engine sometimes does not crank: the solenoid gives a single loud click, but the starter does not turn; after several attempts it may crank normally.
782 words, about 4 min4Gearbox Jumps Out of Second Under Load
An 8-forward/2-reverse constant-mesh gearbox in a 60 hp tractor (3,200 h) jumps out of second gear when pulling a heavy plough, especially on uneven ground. The driver can hold the lever in gear, and the tractor then pulls normally.
851 words, about 4 min5Deciding Whether to Hone or Rebore a Worn Cylinder
A three-cylinder diesel engine has a nominal bore of 88.00 mm and a standard piston-to-liner clearance of 0.08-0.10 mm. After 5,000 hours the engine burns oil and has heavy blow-by.
964 words, about 5 min