Mechanical Engineering Design Objective Questions with Answers - Set 16

Practice Test: Question Set - 16

1. If a spring is cut down into two springs, the stiffness of cut springs will be
    (A) Half
    (B) Same
    (C) Double
    (D) None of the above

2. When carbon in the cast iron is principally in the form of graphite, the cast iron will be of
    (A) Brown colour
    (B) Yellow colour
    (C) White colour
    (D) Grey colour

3. Belt slip may occur due to
    (A) Heavy load
    (B) Loose belt
    (C) Driving pulley too small
    (D) All of the above

4. The coefficient of friction in belt drive depends upon
    (A) Material of belt
    (B) Material of pulley 
    (C) Materials of belt and pulley
    (D) Belt velocity

5. Aircraft body is usually fabricated by
    (A) Welding
    (B) Pre-casting
    (C) Riveting
    (D) Casting

6. The resistance to fatigue of a material is measured by
    (A) Elastic limit
    (B) Ultimate tensile strength
    (C) Young's modulus
    (D) Endurance limit

7. In oilness bearings
    (A) The oil film pressure is generated only by the rotation of the journal
    (B) The oil film is maintained by supplying oil under pressure
    (C) Do not require external supply of lubricant
    (D) Grease required to be applied after some intervals

8. Stress concentration is caused due to
    (A) Variations in load acting on a member
    (B) Variations in properties of materials in a member
    (C) Abrupt change of cross-section
    (D) All of these

9. In second type of levers,
    (A) Load is in between the fulcrum and effort
    (B) Effort is in between the fulcrum and load
    (C) Fulcrum is in between the load and effort
    (D) None of these

10. In V-belt drive, belt touches
    (A) At bottom
    (B) At sides only
    (C) Both at bottom and sides
    (D) Could touch anywhere

11. The radial distance of a tooth from the pitch circle to the top of the tooth is called
    (A) Addendum
    (B) Dedendum
    (C) Clearance
    (D) Working depth

12. For standard coarse threads of nut, the threads will be as strong in failure by shear as the bolt in tension, if the height of nut (h) is approximately
    (A) 0.4 times
    (B) 0.6 times
    (C) 0.7 times
    (D) 0.8 times

13. In a gear, having Involute teeth, the normal to the Involute is a tangent to the
    (A) Base circle
    (B) Pitch circle
    (C) Addendum circle
    (D) Dedendum circle

14. Allen bolts are
    (A) Self locking bolts
    (B) Designed for shock load
    (C) Used in aircraft application
    (D) Provided with hexagonal depression in head

15. The resultant axial load on a bolt depends on
    (A) Initial tension
    (B) External load applied
    (C) Relative elastic yielding (springness) of the bolt and the connected member
    (D) All of the above

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