The coefficient of friction between chip and tool is the variable. It can be reduced by
A.Reducing the width of tool
B.Reducing the depth of cut
C.Reducing the effective rake angle
D.None of these
Category: Mechanical Engineering Mcqs
The solid solution carbon in alpha iron obtained on cooling of 0.2% carbon steel which have been heated above the third critical point is called
A.Ferrite
B.Pearlite
C.Austenite
D.Cementite
The water content of green sand is usually
A.1 to 2 percent
B.6 to 8 percent
C.12 to 18 percent
D.20 to 25 percent
In axial flow turbine
A.Only part of the available head is converted into velocity before the water enters the wheel
B.Water admitted over part of the circumference
C.It is necessary that wheel should always run full
D.It is possible to regulate the flow
E.Depends upon other factors
Which of the following statement about core is incorrect?
A.core should be permeable to escape of core gases
B.core should be capable of collapsing shortly after the molten metal has solidified around it
C.core should produce maximum amount of gas when in contact with molten metal
D.core should be capable of collapsing after the molten metal has solidified around it
Thermal efficiency of a spark ignition engine at full load usually is in the range
A.70 to 90 percent
B.50 to 70 percent
C.30 to 35 percent
D.10 to 25 percent
E.5 to 10 percent
An examiner has given the following as parts of drill bit. Find which one is not correct
A.Dead centre
B.Shank
C.Point
D.Cutting edge
E.Eye
If a particle of a link has a velocity when changes both in magnitude and direction at any instant, then
A.It must have only unidirectional acceleration
B.It must have two components of acceleration e.g. centripetal, and tangential
C.It must have three components of acceleration e.g. centripetal centrifugal and tangential
D.It must have three components of acceleration e.g. centripetal, centrifugal and gravitational
E.It must have four components of acceleration e.g. centripetal, centrifugal gravitational and tangential
The energy content of a photon corresponding to waves in the blue wavelength region is
A.more than that for waves in red portion of the spectrum
B.less than that for waves in red portion of the spectrum
C.equal to that for waves in red portion of the spectrum
D.none of the above
Executive clutch clearance caused by improper adjustment or wear of sliding sleeve, generally results in
A.Clutch slip
B.Clutch failure to disengage
C.Clutch plate over heating
D.Uneven clutch engagement
E.Any of the above
