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.Management Sciences
Category: Machine Design
Machine 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 two parts
D. similar to stud
E. none of the above
Antifriction bearings are__________________?
A. sleeve bearings
B. hydrodynamic bearings
C. thin lubricated bearings
D. ball and roller bearings
E. none of the above
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 connecting rod bolts are tightened up with initial tension greater than the external load so that___________________?
A. joint may not open up
B. bolts are weakest elements
C. the resultant load on the bolt would not be affected by the external cyclic load
D. bolts will not loosen during service
E. none of the above
In standard taper roller bearings, the angle of taper of outer raceway is___________________?
A. 5°
B. 8°
C. 15°
D. 25°
E. 40°.
Stress concentration in static loading is_________________?
Which is correct statement ?
A. very serious in brittle materials and less serious in ductile materials
B. very serious in ductile materials and less serious in brittle materials
C. equally serious in both types of materials
D. seriousness would depend on other factors
E. none of the above
Stress concentration in cyclic loading is____________________?
Which is correct statement ?
A. very serious in brittle materials and less serious in ductile materials
B. very serious in ductile materials and less serious in brittle materials
C. equally serious in both types of materials
D. seriousness would depend on other factors
E. none of the above
Allen bolts are___________________?
A. self locking bolts
B. designed for shock load
C. used in aircraft application
D. provided with hexagonal depression in head
E. uniform strength bolts
The notch angle of the Izod impact test specimen is________________?
A. 10°
B. 20°
C. 30°
D. 45°
E. 60°.
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