A Best Way To Crack Gorenment Job Exams

Mechanical Engineering Objective Questions { Production Technology }



673. Continuous chips are formed when machining
A.Ductile metal
B.Brittle material
C.Heat treated material
D.With lot of pressure and heat against the tool
Discuss in Forum

674. A 5° taper over 5 mm length is to be made on a 100 mm diameter job. Which method should be used?
A.Taper turning attachment
B.Tailstock offset method
C.Compound rest method
D.Form tool method
Discuss in Forum

675. Chip breakers are provided on cutting tools
A.For safety of operator
B.To minimise heat generation
C.To permit easy access of coolant at tool point
D.To permit short segmented chips
Discuss in Forum

676. Tool life is said to be over when
A.Finish of work becomes too rough
B.A certain amount of wear or cratering occurs on the flank
C.Chattering starts
D.Cutter looks dull
Discuss in Forum

677. In the Taylor equation VT^n = C, value of index n is closely related to
A.Workpiece material
B.Cutting tool material
C.Working conditions
D.Temperature at chip tool interface
Discuss in Forum

678. Wear limit on cutting tool is of the order of
A.0.2 mm
B.0.8 mm
C.1.6 mm
D.2.5 mm
Discuss in Forum

679. With high speed steel tools, the maximum safe operating temperature is of the order of
A.200°C
B.540°C
C.760°C
D.870°C
Discuss in Forum

Page 97 of 139

« 95 96  97  9899 »