Q.no.1 The reliability factor for using 90% reliability in design is
A : 0.897
B : 1
C : 0.868
D : 0.814
Q.no 2. A shaft is subjected to
A : Bending stresses
B : Shear stresses
C : Combined bending and shear stresses
D : All of these
Q.no 3. A stud is
A : screw with long threads
B : screw with circular head
C : screw with hexagonal head
D : headless screw with threads on both sides
Q.no 4. The Number of stress cycles that the standard specimen can complete before appearance of first fatigue crack is
A : fatigue life
B : endurance limit
C : ultimate strength
D : yield strength
Q.no 5. The fulcrum pin of lever is designed on the basis of
A : torsional moment
B : axial tensile force
C : bending moment
D : bearing pressure
Q.no 6. The design of shafts made of brittle materials is based on
A : Guest’s theory
B : Rankine’s theory
C : St. Venant’s theory
D : Von Mises Theory
Q.no 7. The load required to produce a unit deflection in the spring is called
A : Modulus of Rigidity
B : Spring stiffness
C : Flexural rigidity
D : Tensional rigidity
Q.no 8. The usual proportion for the width of key is (where d = Diameter of shaft or diameter of hole in the hub)
A : d/8
B : d/6
C : d/4
D : d/2
Q.no 9. While designing a flange coupling, care is taken so that
A : shaft is the weakest component
B : bolts are the weakest component
C : key is the weakest component
D : the flange is the weakest component
Q.no 10. The endurance limit of the component can be increased by
A : increasing the size of component
B : shot peening
C : increasing the stress concentration
D : coating
Answer for Question No 1. is a
Answer for Question No 2. is d
Answer for Question No 3. is d
Answer for Question No 4. is a
Answer for Question No 5. is d
Answer for Question No 6. is b
Answer for Question No 7. is b
Answer for Question No 8. is c
Answer for Question No 9. is c
Answer for Question No 10. is b
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