109) After threading a hole by a tap, it was found that the crest of thread was not formed throughout. Which one of the following reasons would have caused this defect ?

Insufficient coolant supply

Broken the tip of cutting edge of the tap

Hole size slightly less than the tap drill size

Hole size slightly more than the tap drill size

Answer is:

Hole size slightly more than the tap drill size

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110) Which is the possible cause when a twist drill produces a rough hole on the job ?

The clearance angle is too big

The clearance angle is too small

The cutting speed is too low

Feed rate is too high

Answer is:

Feed rate is too high

111) Which angle of counter sink drill you will select for seating counter sink type A (IS : 3406:1986) ?

Counter sink drill 75 Degree

Counter sink drill 80 Degree

Counter sink drill 90 Degree

Counter sink drill 120 Degree

Answer is:

Counter sink drill 90 Degree

112) What will be the result if the clearance angle in drill is increased ?

Poor wedging action

Weak cutting edge

Rough hole surface

Increased point angle

Answer is:

Weak cutting edge

113) A reamed hole has patches of poor finish. Which one of the following is the cause for this defect ?

The bored hole has insufficient reaming allowance

Excessive cutting speed

Wrong selection of the reamer for the job

Insufficient coolant supply

Answer is:

The bored hole has insufficient reaming allowance

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109) After threading a hole by a tap, it was found that the crest of thread was not formed throughout. Which one of the following reasons would have caused this defect ?

Hole size slightly more than the tap drill size

Cutting MCQ with Answers

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110) Which is the possible cause when a twist drill produces a rough hole on the job ?

Feed rate is too high

111) Which angle of counter sink drill you will select for seating counter sink type A (IS : 3406:1986) ?

Counter sink drill 90 Degree

112) What will be the result if the clearance angle in drill is increased ?

Weak cutting edge

113) A reamed hole has patches of poor finish. Which one of the following is the cause for this defect ?

The bored hole has insufficient reaming allowance

Cutting MCQ with Answers