# MCQs on Cutting Fluid and Tool Temperature

1 - Question

Primary deformation zone in metal cutting operation is located at:
a) Around shear plane
b) Tool chip interface
c) Tool work piece interface
d) Tool face
Explanation: Primary deformation is the zone where maximum deformation occurs and occurs around the shear plane.

2 - Question

Secondary deformation zone in metal cutting operation is located at:
a) Shear plane
b) Tool chip interface
c) Tool work piece interface
d) Tool face
Explanation: Secondary deformation zone has medium level of deformation and generally occurs in tool chip interface.

3 - Question

Temperature rise in primary deformation zone is generally due to:
a) Plastic deformation of metal in shear zone
b) Friction between tool and chip
c) Rubbing action of tool piece with work piece
d) None of the mentioned
Explanation: Due to plastic deformation of metal during chip formation, there is a gradual rise in temperature. advertisement

4 - Question

Temperature rise in secondary deformation zone is generally due to:
a) Plastic deformation of metal in shear zone
b) Friction between tool and chip
c) Rubbing action of tool piece with work piece
d) None of the mentioned
Explanation: Temperature rises due to relative motion between chip and tool against some friction. Friction is responsible for the heat generation.

5 - Question

If heat transferred to the atmosphere is neglected, then the average amount of heat in % carried away by chips is nearly equal to:
a) 70
b) 15
c) 20
d) 96
Explanation: About 70% of the heat is carried away by chips, if heat transferred to surrounding is neglected.

6 - Question

If heat transferred to atmosphere is neglected, then the average amount of heat in % transferred to tool is nearly equal to:
a) 70
b) 15
c) 20
d) 96
Explanation: About 15% of the total heat is transferred to tool, if heat transferred to the surrounding is neglected.

7 - Question

If heat transferred to atmosphere is neglected, then the average amount of heat in % transferred to work piece is nearly equal to:
a) 70
b) 15
c) 20
d) 96
Explanation: About 15% of the total heat is transferred to work piece if heat transferred to the surrounding is neglected.

8 - Question

By increasing cutting speed, amount of heat generated
a) Increases
b) Decreases
c) Remains constant
d) None of the mentioned
Explanation: With increase in cutting speed, friction increases and hence the amount of heat generated increases.

9 - Question

By increasing feed rate, amount of heat generated
a) Increases
b) Decreases
c) Remains constant
d) None of the mentioned
Explanation: With an increase in feed rate, friction time for generating heat decreases and hence the amount of heat generated increases.

10 - Question

Amount of heat generated in shear plane is:
a) Directly proportional to shear angle
b) Inversely proportional to shear angle
c) Does not depend on shear angle
d) None of the mentioned