Question

What horsepower will be required to pull 1.2 m mower working at the speed of 5 km/m length of the mower ad mechanical efficiency is 85%?

(a) 1.56

(b) 2.56

(c) 3.56

(d) 4.56

This question was addressed to me in an online interview.

This interesting question is from Harvesting Equipments topic in section Harvesting Equipments of Farm Machinery

Answer 1

The correct choice is (a) 1.56

To elaborate: P=\(\frac{72*5*1000}{75*3600}\) = 1.33 HP

Actual power = 1.33/0.85 = 1.56 HP.