Question

What is the main disadvantage of the nuclear weigher?

(a) They are not mobile

(b) Accuracy depends on speed of material

(c) They are big in size, requires large amount of space

(d) Consumes large amount of electricity

The question was asked in an internship interview.

This is a very interesting question from Coal Weighing Methods in chapter Steam Power Plant of Energy Engineering

Answer 1

The correct answer is (c) They are big in size, requires large amount of space

Easy explanation: Main disadvantage of the nuclear weighing machine is that its accuracy depends on a consistent speed of material movement and the condition of the detectors since this should be kept clean at all times as otherwise absorption value of gamma-rays will be affected.