Shafts, Keys & Couplings Objective Questions - Set 01 - ObjectiveBooks

# Practice Test: Question Set - 01

1. A transmission shaft subjected to pure bending moment should be designed on the basis of
(A) Maximum principal stress theory
(B) Maximum shear stress theory
(C) Distortion energy theory
(D) Goodman or Soderberg diagrams

2. A transmission shaft is subjected to bending moment (Mb) and torsional moment (Mt). The equivalent torsional moment is given by,
(A) √(Mb + Mt)
(B) √(Mb2 + Mt2)
(C) Mb + Mt
(D) Mb +√(Mb2 + Mt2)

3. The standard height for flat key in terms of shaft diameter (D) is,
(A) d
(B) d/2
(C) d/4
(D) d/6

4. Kennedy key is used in
(A) Light duty applications
(B) Heavy duty applications
(C) High speed applications
(D) Precision equipments

5. A bushed-pin type flange coupling is used
(A) For intersecting shafts
(B) When the shafts are not in exact alignment
(C) For small shafts rotating at slow speeds
(D) For parallel shafts

6. Two shafts A and B are made of same material. The diameters of shaft A and B are dA and dB respectively. The ratio of torque transmitted by shaft A to that of shaft B will be
(A) dA/d
(B) (dA/d)2
(C) (dA/d)3
(D) (dA/d)4

7. A transmission shaft is subjected to bending moment (Mb) and torsional moment (Mt). The equivalent bending moment is given by,
(A) √(Mb + Mt)
(B) √(Mb2 + Mt2)
(C) Mb + Mt
(D) Mb +√(Mb2 + Mt2)

8. The standard length for square or flat key in terms of shaft diameter (D) is,
(A) d
(B) 2d
(C) 1.5d
(D) 2.5d

9. The key, which fits in the keyway of hub, only is called,
(B) Feather key
(C) Woodruff key
(D) Kennedy key

10. Splines are used if,
(A) The power to be transmitted is high
(B) The torque to be transmitted is high
(C) The speed is high
(D) There is relative motion between shaft and hub

11. The shafts will have same strength on the basis of torsional rigidity, if
(A) Diameter and length of both shafts is same
(B) Material of both shafts is same
(C) Angle of twist for both shafts is same
(D) All of above conditions are satisfied

12. Maximum principle stress theory is used for
(A) Cast iron shafts
(B) Steel shafts
(C) Aluminum shafts
(D) Plastic shafts

13. The type of key used when the gear is required to slide on the shaft is
(A) Sunk key
(B) Feather key
(C) Woodruff key
(D) Kennedy key

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