Machine Multiple Choice Questions with Answers - Set 14

Practice Test: Question Set - 14


1. In leaf springs, the longest leaf is known as
    (A) Master leaf
    (B) Lower leaf
    (C) Upper leaf
    (D) None of these

2. For same pulley diameters, center distance, belt speed and belt and pulley materials,
    (A) Open belt drive transmits more power than crossed belt drive 
    (B) Crossed belt drive transmits more power than open belt drive 
    (C) Open and crossed belt drives transmit same power 
    (D) Power transmission does not depend upon open and crossed types of constructions 

3. Which is correct statement?
    (A) A member made of steel will generally be more rigid than a member of equal load carrying ability made of cast iron
    (B) A member made of cast iron will generally be more rigid than a member of equal load carrying ability made of steel
    (C) Both will be equally rigid
    (D) Which one is rigid will depend on several other factors

4. When two helical springs of equal lengths are arranged to form a cluster spring, then
    (A) Shear stress in each spring will be equal
    (B) Load taken by each spring will be half the total load
    (C) Only A is correct
    (D) Both A and B is correct

5. Resistance to fatigue of a material is measured by
    (A) Young's modulus
    (B) Coefficient of elasticity
    (C) Elastic limit
    (D) Endurance limit

6. The crest diameter of a screw thread is same as
    (A) Major diameter
    (B) Minor diameter
    (C) Pitch diameter
    (D) Core diameter

7. A localized compressive stress at the area of contact between two members is known as
    (A) Bending stress
    (B) Shear stress
    (C) Tensile stress
    (D) Bearing stress

8. The objective of ‘crowning’ of the flat pulleys of belt drive is to
    (A) Prevent the belt from running off the pulley 
    (B) Increase the power transmission capacity 
    (C) Increase the belt velocity 
    (D) Prevent the belt joint from damaging the belt surface

9. Maximum principal stress theory is applicable for
    (A) Ductile materials
    (B) Brittle materials
    (C) Elastic materials
    (D) All of the above

10. The following type of nut is used with alien bolt
    (A) Hexagonal nut
    (B) Slotted nut
    (C) Castle nut
    (D) Any one of the above

11. The standard length of the shaft is
    (A) 6 m
    (B) 5 m
    (C) 7 m
    (D) All of these

12. 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 between parts
    (D) Similar to stud

13. A self locking screw has
    (A) Fine threads
    (B) Course threads
    (C) Coefficient of friction is greater than tangent of load angle
    (D) Hole for inserting split pin

14. The included angle between the sides of V-belt is
    (A) 40°
    (B) 45°
    (C) 38°
    (D) 60°

15. The designation M 33 × 2 of a bolt means
    (A) Metric threads of 33 numbers in 2 cm
    (B) Metric threads with cross-section of 33 mm
    (C) Metric threads of 33 mm outside diameter and 2 mm pitch
    (D) Bolt of 33 mm nominal diameter having 2 threads per cm

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