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Fitter
Fitter Set-2
Drilling
54

Drilling MCQ with Answers

54) Why drilled holes are over sized in drilling operation?

Drill is not sharp

Unequal lip length

Feed rate is too high

Cooling is insufficient

Answer is:

Unequal lip length

Drilling MCQ with Answers

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Related Drilling MCQ with Answers

55) What is the name of the operation producing flat seat on drilled hole?

Drilling

Spot facing

Countersinking

Counterboring

Answer is:

Spot facing

What is the name of the operation producing flat seat on drilled hole?

56) What is the purpose of flute in drill?

To drive out the chips

To reduce the weight

To reduce the cost

To increase the speed

Answer is:

To drive out the chips

57) What is the angle of countersink tool used on holes to be threaded?

75 Degree

80 Degree

90 Degree

120 Degree

Answer is:

120 Degree

58) What is the formula to calculate the blank size of external thread (where p=pitch and d=depth)?

D = d ? p/10

D = d + p/10

D = d x p/10

D = d ? p/10

Answer is:

D = d ? p/10

Drilling MCQ with Answers

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