BASIC FITTING - Practice Mode

1) How the drill chucks are held on the machine spindle?

By arbor By sockets By sleeves By special clamp

Correct Answer: By arbor

2) Which drilling machine, the spindle head is moved towards or away from the column?

Pillar drilling machine Gang drilling machine Radial drilling machine Sensitive bench drilling machine

Correct Answer: Radial drilling machine

3) Which type of screw threads are rounded at the crest and root?

B.A thread B.S.F thread B.S.W thread ACME thread

Correct Answer: B.S.W thread

4) What is the formula to calculate tap drill size?

Tap drill size = Major dia ? (2 x depth) Tap drill size = Major dia + (2 x depth) Tap drill size = Major dia ? (2 + depth) Tap drill size = Major dia + (2 + depth)

Correct Answer: Tap drill size = Major dia ? (2 x depth)

5) Which activity causes excessive wear and chattering of drill bit while drilling?

Too fast feed rate Too slow feed rate More cutting speed Too slow spindle speed

Correct Answer: Too slow feed rate

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