Question

What is the tensile strength of blade of feeler gauge with thickness up to 0.5 mm?

(a) 170 kgf/mm^2

(b) 270 kgf/mm^2

(c) 50 kgf/mm^2

(d) 70 kgf/mm^2

The question was asked by my school principal while I was bunking the class.

My question is from Feeler Gauges in portion Linear Measurements of Engineering Metrology

Answer 1

Right answer is (a) 170 kgf/mm^2

Best explanation: The blades of feeler gauges are made of heat treated tool steel. For thickness up to 0.5 mm, the tensile strength of blades is 170 kgf/mm^2 and for 0.5 mm or above thickness it is 70 kgf/mm^2.