In metal machining, the work-tool contact zone is a zone where heat is generated due to

A Plastic deformation of metal
B Burnishing friction
C Friction between the moving chip and the tool face
D None of the above

Correct Answer: Burnishing friction

Burnishing is the plastic deformation of a surface due to sliding contact with another object. It smooths the surface and makes it shinier.In metal machining, the work-tool contact zone is a zone where heat is generated due to Burnishing friction
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Related Questions

In metal machining, the zone where the maximum heat is generated due to the plastic deformation of metal, is called
A Friction zone
B Work-tool contact zone
C Shear zone
D None of these
In metal machining, the zone where the heat is generated due to friction between the moving chip and the tool face, is called
A Friction zone
B Work-tool contact zone
C Shear zone
D None of these
Pharmacists recently conducted a study with respect to the reasons their customers purchased eye drops to soothe eye dryness. Dry eyes were more frequently experienced by customers who wore contact lenses than by custorners who did not wear contact lenses. The pharmacists concluded that wearing contact lenses, by itself, can cause contact wearers to have dry eyes.
A An inherited condition can cause both weak eyesight and dry eyes
B Physical exertion causes dry eyes in many people who wear contact lenses.
C Most people who have dry eyes do not wear contact lenses.
D Most people who wear contact lenses do not have dry eyes.
Indirect contact heat exchangers are preferred over direct contact heat exchangers, because
A Heat transfer co-efficient are high
B There is no risk of contamination
C There is no mist formation
D Cost of equipment is lower
The total population of 10 countries in the Asian zone is greater than the total population of 11 countries in the European zone. What can we say if one of the countries is dropped from the Asian zone ?
A Total population of the Asian zone will still be greater than the total population of the European zone
B Total population of the European zone will be greater than the total population of the Asian zone
C Total population of both zones will be equal
D We cannot say anything conclusively
How are the efficiencies of any heat engine (miu) and reversible heat engine (miuR) compared, when both are operating between same heat source and same heat sink?
A miu = miuR
B miu>miuR
C miu
D none of these
The scales form in heat exchanges after a period of operation and provide additional resistance to heat transfer with some heat transfer coefficient . The reciprocal of this scale heat transfer coefficient is called .
A scaling factor
B forming factor
C resisting factor
D fouling factor
Extended heat transfer surface like fins are used to increase the heat transfer rate. Fin efficiency is defined as the ratio of heat transferred across the fin surface to the theoretical heat transfer across an equal area held at the
A Surrounding temperature
B Average temperature of the fin
C Temperature of the fin end
D Constant temperature equal to that of the base
Air is to be heated by condensing steam. Two heat exchangers are available (i) a shell and tube heat exchanger and (ii) a finned tube heat exchanger. Tube side heat transfer area are equal in both the cases. The recommended arrangement is
A Finned tube heat exchanger with air inside and steam outside
B Finned tube heat exchanger with air outside and steam inside
C Shell and tube heat exchanger with air inside tubes and steam on shell side
D Shell and tube heat exchanger with air on shell side and steam inside tubes
When does the heat generated by fluid friction becomes appreciable compared to the heat transferred between the fluids?
A At high fluid velocity
B At low velocity
C When fluid flows past a smooth surface
D None of these

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