Question

One of the advantages of the solid lubricants is ___________

(a) unstable in radiation

(b) high coefficient of friction than liquid lubricants

(c) low coefficient of friction

(d) permit equipment is simple

The question was asked in unit test.

Origin of the question is Classification of Lubricants topic in chapter Lubricants of Applied Chemistry

Answer 1

The correct option is (d) permit equipment is simple

To explain: The permit equipment is simple so that it can be carried anywhere very easily. Normally, the coefficient of friction of the solid lubricant is low and it is a disadvantage. Another disadvantage is it is unstable in radiation.