DRILLING - Practice Mode

1) Why lime stone serves as flux added to the ore in the blast furnace?

To form molter slag To supply the oxygen To burn the carbon in coke To increase the melting point of ore

Correct Answer: To form molter slag

2) Which micrometer having provision of interchangeable anvils?

Depth micrometer Inside micrometer Outside micrometer Screw thread micrometer

Correct Answer: Screw thread micrometer

3) Which factor determine the selection of wire in screw thread micrometer?

Thread angle Type of thread and pitch Root and crest Major diameter

Correct Answer: Type of thread and pitch

4) What is measured with telescopic gauge?

Depth External dimension Angular dimension Size of holes, slots and recesses

Correct Answer: Size of holes, slots and recesses

5) What is produced from blast furnace?

Pig iron Cast iron Wrought iron Malleable iron

Correct Answer: Pig iron

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