Subtopic: Power transmission systems – gear trains, differential, final drives and power take-off
Question Statement:
As per BIS standard, the power tests for tractor PTO includes
Options:
(A) Maximum power, varying load and varying speed tests
(B) Varying speed and maximum power tests
(C) Varying load and varying speed tests
(D) Varying load and maximum power ratio tests
Official Answer Key:
A
Step-by-Step Solution & Explanation
BIS (IS code) tractor PTO performance testing comprises three components: (i) a maximum PTO power test at rated engine speed, (ii) a varying-load test at rated PTO speed to trace the power/torque/fuel-consumption curve, and (iii) a varying-speed test to obtain the governor/PTO speed characteristic. This three-part combination corresponds to option (A). The other options omit one of the three mandatory components.
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