Which of the following statements is not true about white cast iron?

Smith’s test is used to find out ________

Which of the following is also called white mica?

For a stone to be used in road work, coefficient of hardness should be greater than _______

In which type of casting, the outer surface is made hard while the inner surface remains relatively soft?

The acid test used for testing building stones cannot be applied to limestones.

Which of the following is not a component of packaged air conditioners?

Aston’s process is used to manufacture _____