Question

A cylinder type chaff cutter head in a direct throw field chopper has 5 knives and diameter as 450 mm. The throat size is 40*12 cm for 15 mm theoretical length of cut with corn silage. What will be the rated capacity in megagrams per hours at 100% field efficiency?

(a) 1.7

(b) 1.08

(c) 1.23

(d) 1.50

The question was asked during an interview.

This interesting question is from Processing Equipments topic in division Processing Equipments of Farm Machinery

Answer 1

The correct option is (b) 1.08

The explanation: Theoretical Capacity = A*v*d = W*H*L*N*n*d

V = π Dr N

N = \(\frac{v}{πDr}=\frac{30}{π*0.45} \)

T.C. = 0.40*0.12*0.015*30*5*340*60

T.C. = 1558.44 kg/hr = 1.55 Mg/hr

Rated capacity = \(\frac{70}{100}*1.55=1.085 \frac{Mg}{hr}. \)