Gce Model Questions Vol1 2017 Agricultural Science Question 35

Practice objective / multiple choice question 35 from the 2017 Gce Model Questions Vol1 Agricultural Science examination.

Gce Model Questions Vol1 2017 Agricultural Science Objective / Multiple Choice Medium Difficulty
Question 35 GCE_MODEL_QUESTIONS_VOL1 • 2017 • AGRICULTURAL_SCIENCE • objective

A tractor has an engine rated at 120 kW at the crankshaft. The transmission efficiency is 85 % and the final‑drive efficiency is 90 %. The drawbar efficiency (the proportion of wheel power that can be used for pulling) is 70 %. A combine harvester requires a drawbar power of 45 kW to operate at the required field speed.\n\n(a) Can the tractor supply the required drawbar power?\n(b) If it could not, what is the minimum engine power (in kW) that would be needed, assuming the same efficiencies?

Answer Options

A. No, the tractor cannot supply the required power; minimum engine power required ≈ 95 kW
B. Yes, the tractor can supply the required power; minimum engine power required ≈ 78 kW
Correct Answer C. Yes, the tractor can supply the required power; minimum engine power required ≈ 84 kW
D. No, the tractor cannot supply the required power; minimum engine power required ≈ 84 kW
Correct Answer
C
Correct Option:
Yes, the tractor can supply the required power; minimum engine power required ≈ 84 kW

About This Question

This is Gce Model Questions Vol1 2017 Agricultural Science Question 35. It is one of the objective questions from the 2017 Gce Model Questions Vol1 Agricultural Science examination.

Difficulty level: Medium .

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