# MCQs on Geometry of Twist Drills-3

1 - Question

Length measured along the axis between the dead centre and start of neck of a twist drill is known as
a) Body length
b) Flute length
c) Lip length
d) Overall length
Explanation: Body length is the length measured along the axis between the dead centre and start of neck. Flute length is the length measured parallel to the axis between the dead centre and the point of termination of flute near the neck.

2 - Question

Length measured parallel to the axis between the dead centre and the point of termination of flute near the neck is known as
a) Body length
b) Flute length
c) Lip length
d) Overall length
Explanation: Flute length is the length measured parallel to the axis between the dead centre and the point of termination of flute near the neck. Body length is the length measured along the axis between the dead centre and start of neck.

3 - Question

In twist drill, distance measured between the chisel edge corner and the outer corner is known as
a) Body length
b) Flute length
c) Lip length
d) Overall length
Explanation: Lip length is the length measured between the chisel edge corner and the outer corner. Body length is the length measured along the axis between the dead centre and start of a neck. advertisement

4 - Question

In twist drills, length measured along the axis between the dead centre and the extreme end of the tang is known as
a) Body length
b) Flute length
c) Lip length
d) Overall length
Explanation: Overall length is the length measured along the axis between the dead centre and the extreme end of the tang. Body length is the length measured along the axis between the dead centre and start of neck.

5 - Question

Reduction in body diameter measured along the radius of twist drill is known as
a) Body length
c) Depth of body clearance
d) Core taper
Explanation: Depth of body clearance is a reduction in body diameter measured along radius of twist drill.

6 - Question

Web taper is also known as
a) Body length
c) Depth of body clearance
d) Core taper
Explanation: Core taper is the increase in core thickness. Web taper is also known as core taper.

7 - Question

Measure of increase in web thickness or core thickness, starting from the minimum at the point end to the maximum at the shank end of twist drill
a) Body length
c) Depth of body clearance
d) Core taper
Explanation: Core taper or web taper is the measure of the increase in web thickness or core thickness, starting from the minimum at the point end to the maximum at the shank end of twist drill.

8 - Question

Axial distance measured between two corresponding points on a flute in its one complete turn in twist drill is known as
a) Body length
c) Depth of body clearance
d) Core taper
Explanation: Lead helix is the axial distance measured between two corresponding points on a flute in its one complete turn in twist drill.

9 - Question

Rake angle of drill is also as
a) Taper angle
b) Friction angle
c) Helix angle
d) None of the mentioned
Explanation: Helix angle of drill is also known as rake angle. Lead helix is the axial distance measured between two corresponding points on a flute in its one complete turn in twist drill.

10 - Question

Which of the following is correct about helix angle for right hand flute drill?
a) Positive
b) Negative
c) Zero
d) None of the mentioned