Automotive Engine Components Design Questions and Answers – IC Engine – Centre Crankshaft at Angle of Maximum Torque

This set of Automotive Engine Components Design Questions and Answers for Freshers focuses on “IC Engine – Centre Crankshaft at Angle of Maximum Torque”

1. The maximum torque is due to which component of force on the crank pin?
a) Perpendicular
b) Parallel
c) Concentric
d) Tangential
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2. What is the crank angle from the TDC position for the petrol engine?
a) 30° to 40°
b) 35° to 45°
c) 25° to 35°
d) 20° to 30°
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3. What is the crank angle from the TDC position for diesel engines?
a) 35° to 45°
b) 25° to 35°
c) 30° to 40°
d) 20° to 30°
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4. The relationship between Φ and θ is given by?
a) SinΦ=\(\frac{sin\theta}{L/r}\)
b) CosΦ=\(\frac{sin\theta}{L/r}\)
c) SinΦ=\(\frac{sin\theta}{L\times r}\)
d) CosΦ=\(\frac{cos\theta}{L/r}\)
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5. In the formula SinΦ=\(\frac{sin\theta}{L/r}\), what is L?
a) Lateral shift
b) Length of connecting rod
c) Linear bending
d) Length of stroke
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6. In the formula P_t=P_qSin(θ+Φ), what is P_t?
a) The pressure at crankpin
b) The lateral component at crankpin
c) The tangential component at crankpin
d) Power at crankpin
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7. In the formula P_r=P_qSin(θ+Φ), what is P_r?
a) The radial component at crankpin
b) Pressure component at crankpin
c) The tangential component at crankpin
d) Vector component at crankpin
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8. Which are the two forces experienced by the crank pin?
a) Bending and shear moment
b) Two couple force
c) Force and torsional moment
d) Bending and torsional moment
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9. In the formula M_t=P_t×r, what is M_t?
a) Couple
b) Bending moment
c) Torsional moment
d) Shear moment
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10. The right-hand crank web is subjected to which stress due to radial component.
a) Tensile
b) Compressive
c) Normal strain
d) Linear stress
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11. The maximum compressive stress should be less than which stress?
a) Allowable tensile stress
b) Allowable compressive stress
c) Allowable shear stress
d) Allowable bending moment
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12. Calculate the width of the crank web when the diameter of crankpin is 65mm?
a) 57.3mm
b) 74.1mm
c) 63.7mm
d) 80.6mm
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13. Calculate the direct compressive stress when the reaction force is 15340N and the thickness and width of the crank web are 46mm and 75mm?
a) 8.43N/mm²
b) 4.44N/mm²
c) 5.54N/mm²
d) 3.68N/mm²
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14. In the formula σ_c=\(\frac{(R_1)_v}{W_t}\) , what is (R₁)_v ?
a) Point load
b) Eccentric load
c) UVL
d) UDL
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Sanfoundry Global Education & Learning Series – Automotive Engine Components Design.

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