Q.no 41. When the shaft is subjected to pure bending moment, the bending stress is given by?
A : 32M/πdᵌ
B : 16M/πdᵌ
C : 8M/πdᵌ
D : M/πdᵌ
Q.no 42. 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
Q.no 43. Maximum principle stress theory is used for
A : cast iron shafts
B : steel shafts
C : flexible shafts
D : plastic shafts
Q.no 44. If bending stress in a screw is of magnitude 95N/mm² and torsional shear stress of
magnitude 15N/mm², then what is the principal shear stress?
A : 48.7N/mm²
B : 54.3 N/mm²
C : 51.4 N/mm²
D : 49.8 N/mm²
Q.no 45. A right angled bell-crank is designed to raise a load of 5kN at short arm whose
length is 100mm. Also longer arm is of length 500mm. If permissible bearing pressure on pin
is 10N/mm² and diameter of the 20mm, find the length of the pin.
A : 35.5 mm
B : 25.5 mm
C : 20 mm
D : 30 mm
Q.no 46. If shaft diameter is 60mm, how many bolts are recommended for rigid flange coupling?
A : 2
B : 3
C : 4
D : 5
Q.no 47. The holding power of sunk key is due to resistance which it offers in
A : Shear
B : Crushing
C : Shear and crushing
D : Tension
Q.no 48. The bending stress induced in a beam is
A : maximum at the farthest fiber from neutral axis and zero at the neutral axis
B : uniform through out the cross-section
C : zero at the farthest fiber from neutral axis and maximum at the neutral axis
D : zero at the neutral axis and zero at the farthest fiber and maximum at the mean distance
Q.no 49. A spring is designed for
A : Higher strength
B : Higher deflection
C : Higher stiffness
D : highly resistance
Q.no 50. While designing shaft on the basis of torsional rigidity, angle of twist is given by?
A : Ml/Gd⁴
B : 584Ml/Gd⁴
C : 292 Ml/Gd⁴
D : None of the mentioned
Answer for Question No 41. is a
Answer for Question No 42. is d
Answer for Question No 43. is a
Answer for Question No 44. is d
Answer for Question No 45. is b
Answer for Question No 46. is c
Answer for Question No 47. is c
Answer for Question No 48. is a
Answer for Question No 49. is b
Answer for Question No 50. is b
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