1) (ω cos θ) / n is the formula used to calculate
a. angular velocity of connecting rod
b. velocity of piston
c. angular acceleration of connecting rod
d. All of the above
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Answer
Explanation
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ANSWER: angular velocity of connecting rod
Explanation:
No explanation is available for this question!
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2) In a Hooke's joint, maximum velocity ratio between driving and driven shaft is possible if θ is
a. 0
b. π
c. 2 π
d. all of the above
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Answer
Explanation
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ANSWER: all of the above
Explanation:
No explanation is available for this question!
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3) According to loop closure equation, in a closed loop mechanism the sum of relative position vectors for the links is
a. less than 1
b. zero
c. greater than 1
d. none of the above
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Answer
Explanation
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ANSWER: zero
Explanation:
No explanation is available for this question!
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4) Why is double Hooke's joint used?
a. To obtain uniform velocity ratio
b. To obtain variable velocity ratio
c. Both a. and b.
d. None of the above
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Answer
Explanation
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ANSWER: To obtain uniform velocity ratio
Explanation:
No explanation is available for this question!
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5) In IC engine mechanism, which formula is used to calculate acceleration of the piston?
a. ω 2 r (cos θ + cos θ / n)
b. ω 2 r (cos θ + cos 2θ / n)
c. ω 2 r (cos θ - cos θ / n)
d. ω 2 r (cos θ - cos 2θ / n)
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Answer
Explanation
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ANSWER: ω2 r (cos θ + cos 2θ / n)
Explanation:
No explanation is available for this question!
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6) Match the following Group 1 items with Group 2 items
1. Displacement of piston -------------------------------------- A. - (ω2 /n) sin θ
2. Angular velocity of connecting rod ----------------------- B. [ω r (sin θ + sin 2θ / 2n)]
3. Angular acceleration of connecting rod ------------------ C. r [1 + n – cos θ - √(n2 – sin2 θ)]
4. Velocity of piston --------------------------------------------- D. ω cos θ / √( n2 – sin2 θ)
a. 1 – A, 2 – C, 3 – D, 4 - B
b. 1 – D, 2 – B, 3 – A, 4 - C
c. 1 – C, 2 – D, 3 – A, 4 - B
d. 1 – C, 2 – A, 3 – D, 4 - B
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Answer
Explanation
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ANSWER: 1 – C, 2 – D, 3 – A, 4 - B
Explanation:
No explanation is available for this question!
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7) Which relation is used to denote condition for equal speeds, when driving and driven shafts are connected by Hook's joint?
a. tan θ = ± √cos α
b. tan θ = ± √cot α
c. tan θ = ± √sin α
d. cot θ = ± √cos α
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Answer
Explanation
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ANSWER: tan θ = ± √cos α
Explanation:
No explanation is available for this question!
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8) Which among the following is the condition for maximum acceleration in Hooke's joint?
a. cos 2 θ ≈ (2 sin 2 α / 2 + sin 2 α)
b. cos θ ≈ (2 sin 2 α / 2 - sin 2 α)
c. cos 2 θ ≈ (2 sin 2 α / 2 - sin 2 α)
d. cos 2 θ ≈ (sin 2 α / 2 - sin 2 α)
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Answer
Explanation
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ANSWER: cos 2 θ ≈ (2 sin2 α / 2 - sin2 α)
Explanation:
No explanation is available for this question!
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9) Calculate the angular speed of driven shaft if the driving shaft has angular speed of 400 rpm. When shaft angle is 20o and angle of rotation is 40o in Hooke's joint.
a. 40.23 rad/s
b. 42.45 rad/s
c. 36.82 rad/s
d. None of the above
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Answer
Explanation
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ANSWER: 42.45 rad/s
Explanation:
No explanation is available for this question!
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10) Calculate the angle of driving shaft, if the two shafts of the Hooke's joint are inclined at an angle of 18.50o
a. 45.56 o
b. 37.70 o
c. 39.17 o
d. 41.95 o
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Answer
Explanation
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ANSWER: 41.95o
Explanation:
No explanation is available for this question!
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