This set of Machine Tools Multiple Choice Questions & Answers (MCQs) focuses on “Drilling Operation-2”.
1. Tapping is carried out by using tap tool.
a) true
b) false
View Answer
Explanation: As per the definition of this process. A tap is also applied for cutting and forming female part of the mating pair like nuts.
2. Which of the following operation is carried out to make the hole dimensionally more accurate?
a) reaming
b) tapping
c) boring
d) none of mentioned
View Answer
Explanation: Reaming is used for this purpose. Reaming also improve the surface finish which is its extra advantage.
3. Which of the following operation is performed to provide recess for bolt heads or nuts?
a) counterboring
b) spot facing
c) tapping
d) none of the mentioned
View Answer
Explanation: As per the definition of counterboring process. Generally, counter boring is a process carried out for delivering recess for nuts etc.
4. Reaming is carried out by using a reamer.
a) true
b) false
View Answer
Explanation: It is carried out by a reamer. Reamer is a cutting tool generally used for enlarging the hole with great accuracy.
5. Which of the following process is carried out to provide seating for head of screw?
a) counterboring
b) countersinking
c) tapping
d) none of the mentioned
View Answer
Explanation: As per the definition of countersinking process. To make the cone or taper shape at the entrance of the hole, this process is used.
6. Countersinking process is carried out by using countersink tool.
a) true
b) false
View Answer
Explanation: Countersink tool is used for countersinking process. Counter sinks are available as single flute and and multi flute tools.
7. Taping process employs high operating conditions.
a) true
b) false
View Answer
Explanation: This is false. Taping process employs low operating conditions.
8. To produce more accurate holes, which of the following operation should be performed third?
a) drilling
b) reaming
c) centering
d) boring
View Answer
Explanation: As per the characteristic of all these operation, boring should be performed third in order to produce more accurate holes. Boring is used to make hole of size for which drill is not available. It generally enlarge the hole.
9. To produce more accurate holes, which of the following operation should be performed second?
a) drilling
b) reaming
c) centering
d) boring
View Answer
Explanation: As per the characteristic of all these operation, drilling should be performed second in order to produce more accurate holes. Drilling doesn’t make hole of exact dimension and accuracy. For exact dimension boring is carried out and for final dimensional accuracy reaming is carried out.
10. Which of the following operation is used to enlarge the previously drilled hole?
a) reaming
b) tapping
c) boring
d) none of mentioned
View Answer
Explanation: Boring is used for this purpose. Apart from this, boring aslo insures the exact location of a hole. It makes the hole concentric with the axis of rotation.
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