The endurance limit in shear of carbon steel can be obtained by multiplying the endurance limit in flexure by a factor of____________?
A. 0.25
B. 0.45
C. 0.55
D. 0.65
E. 0.75
Machine Design
A bolt___________________?
A bolt___________________?
A. has a head on one end and a nut fitted to the other
B. has head at one end and other end fits into a tapped hole in the other part to be joined
C. has both the ends threaded
D. is provided with pointed threads
E. requires no nut
If d is the diameter of bolt hole then for a flanged pipe joint to be leak proof, the circumferential pitch of the bolts should be_________________?
If d is the diameter of bolt hole then for a flanged pipe joint to be leak proof, the circumferential pitch of the bolts should be_________________?
A. lOVZ
B. 10VZtol5Vd
C. 15Vdto20VZ
D. 20Vdto30Vd
E. 30V5″to40Vd
The following type of nut is used with alien bolt____________________?
The following type of nut is used with alien bolt____________________?
A. alien nut
B. hexagonal nut
C. slotted nut
D. castle nut
E. any one of the above
Shear stress theory is applicable for____________________?
Shear stress theory is applicable for____________________?
A. ductile fnaterials
B. brittle materials
C. elastic materials
D. all of the above
E. none of the above
For applications involving high stresses in one direction only the following type of thread would be best suited______________________?
For applications involving high stresses in one direction only the following type of thread would be best suited______________________?
A. ISO metric thread
B. acme thread
C. square thread
D. buttress thread
E. British Association thread
The function of a washer is to___________________?
The function of a washer is to___________________?
A. provide cushioning effect
B. provide bearing area
C. absorb shocks and vibrations
D. provide smooth surface in place of rough surface
E. act as a locking device
Ball bearing type screws are found in following application_____________________?
Ball bearing type screws are found in following application_____________________?
A. screw jack
B. aeroplane engines
C. crane
D. steering mechanism
E. bench vice
An alien bolt is___________________?
An alien bolt is___________________?
A. self locking bolt
B. same as stud
C. provided with hexagonal depression in head
D. used in high speed components
E. provided with countersunk head
Set screws are_________________?
Set screws are_________________?
A. similar to small size tap bolts except that a greater variety of shapes of heads are available
B. slotted for a screw driver and generally used with a nut
C. used to prevent relative motion be-tween parts
D. similar to stud
E. none of the above