Quality Engineer and Supervisor Interview Questions and Answers

The least count of a vernier caliper is the smallest measurement that can be read on the scale.

• The least count is typically 0.02 mm or 0.001 inches on a standard vernier caliper.

• It is determined by the number of divisions on the main scale and the vernier scale.

• For example, if the main scale has divisions of 1 mm and the vernier scale has 50 divisions, the least count would be 0.02 mm (1 mm / 50).

There are two main types of boilers: fire tube boilers and water tube boilers.

• Fire tube boilers have hot gases passing through tubes that are surrounded by water. Examples include Scotch marine boilers.

• Water tube boilers have water flowing inside the tubes while hot gases surround them. Examples include Babcock and Wilcox boilers.