Mechanical Joints Objective Questions & Answers - Set 02 - ObjectiveBooks

Mechanical Joints Objective Questions & Answers - Set 02

Practice Test: Question Set - 02


1. If the stiffness of parts held together by bolt is too large compared with the stiffness of bolt (hard gasket), then the resultant load on the bolt is equal to
    (A) Initial tension
    (B) External load
    (C) Sum of initial tension and external load
    (D) Higher of initial tension and external load

2. The resilience of a bolt can be increased by
    (A) Increasing shank diameter
    (B) Increasing length of shank portion of bolt
    (C) Increasing core diameter of threads
    (D) Using a washer

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

4. Machine bolts are
    (A) Through bolts with rough shank and used with nut
    (B) Are used to prevent relative motion between two parts
    (C) Similar to stud
    (D) Turned into a threaded hole in one of the parts

5. A self-locking screw has
    (A) Fine threads
    (B) Coarse threads
    (C) Two nuts
    (D) Coefficient of friction more than tangent of lead angle

6. An ordinary bolt is converted into bolt of uniform strength by
    (A) Reducing the shank diameter of bolt to the core diameter of threads
    (B) Drilling a hole all along the length of shank in unthreaded portion
    (C) Increasing the stress in the shank portion of bolt
    (D) Using all three methods

7. If the stiffness of parts held together by bolt is too small compared with the stiffness of bolt (soft gasket), then the resultant load on the bolt is equal to
    (A) Initial tension
    (B) External load
    (C) Sum of initial tension and external load
    (D) Higher of initial tension and external load

8. The coupler of turnbuckle has
    (A) Right hand threads on both ends
    (B) Left hand threads on both ends
    (C) Left hand threads on one end and right hand threads on other end
    (D) No threads

9. The designation M 20 means
    (A) Metric coarse threads of 20 mm outside diameter
    (B) Metric fine threads of 20 mm outside diameter
    (C) Metric threads of 20 mm core diameter
    (D) Metric threads of 20 mm pitch diameter

10. Split nut is a locking device in which
    (A) A smaller nut is tightened against main nut creating friction at the contacting surface
    (B) A split pin is passed through diametrically opposite slots in nut and a hole in bolt and the two ends of split pin are separated and bent back on nut
    (C) A slot is cut in the middle of nut along the length and a cap screw is provided to tighten the two parts of nut separated by slot
    (D) An elastic piece is tightened in the nut by a setscrew

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