Choice the correct answer of the following statements: 1. The power transmitted of two pulleys connected by an open belt or crossed belt is a) directly proportional to their diameters; b) inversely proportional to their diameters; proportional to the square of their diameters; c) directly d) inversely proportional to the square of their diameters. 2. Two pulleys of diameters d1 and d2 and at distance x apart are connected by means of an open belt drive. The length of the belt is: a) π/2 (d: + dz) 2x + (d: + dz)/4x; b) n/2 (di-da) 2x + (di-da)/4x; c) r /2 (d: + dz) 2x + (di-dz)/4x; d) π/2 (d₁-d.) 2x + (d; d))²/4x. 3. In a cone pulley, if the sum of radii of the pulleys on the driving and driven shafts is constant, then: a) open belt drive is recommended; b) cross belt drive is recommended; c) both open belt drive and crass belt drive are recommended; d) the drive is recommended depending upon the torque transmitted. 4. Due to not slip of the belt, the power transmitted of the belt drive: a) decreases; b) increases; c) does not change; d) none of the mentioned. 5. When two pulleys of same diameters are connected by means of an open belt drive, then the angle of contact taken into consideration should be of the: a) larger pulley; b) smaller pulley; c) average of two pulleys; d) none of the mentioned. 6. The power transmitted by a belt is maximum when the maximum tension in the belt (2T) is equal to: a) Tc: b) 2Tc: c) 3Tc; d) none of them. 7. The velocity of the belt for maximum power is: a) VT/3m; b) VT/4m; c) VT/5m; d) vT/6m. 8. The decreasing the centrifugal tension in belts: a) increases power transmitted; b) decreases power transmitted; c) have no effect on the power transmitted; d) increases power transmitted upto a certain speed and then decreases. 9. When the belt is stationary, it is subjected to some tension, known as initial tension. The value of this tension is equal to the:
Choice the correct answer of the following statements: 1. The power transmitted of two pulleys connected by an open belt or crossed belt is a) directly proportional to their diameters; b) inversely proportional to their diameters; proportional to the square of their diameters; c) directly d) inversely proportional to the square of their diameters. 2. Two pulleys of diameters d1 and d2 and at distance x apart are connected by means of an open belt drive. The length of the belt is: a) π/2 (d: + dz) 2x + (d: + dz)/4x; b) n/2 (di-da) 2x + (di-da)/4x; c) r /2 (d: + dz) 2x + (di-dz)/4x; d) π/2 (d₁-d.) 2x + (d; d))²/4x. 3. In a cone pulley, if the sum of radii of the pulleys on the driving and driven shafts is constant, then: a) open belt drive is recommended; b) cross belt drive is recommended; c) both open belt drive and crass belt drive are recommended; d) the drive is recommended depending upon the torque transmitted. 4. Due to not slip of the belt, the power transmitted of the belt drive: a) decreases; b) increases; c) does not change; d) none of the mentioned. 5. When two pulleys of same diameters are connected by means of an open belt drive, then the angle of contact taken into consideration should be of the: a) larger pulley; b) smaller pulley; c) average of two pulleys; d) none of the mentioned. 6. The power transmitted by a belt is maximum when the maximum tension in the belt (2T) is equal to: a) Tc: b) 2Tc: c) 3Tc; d) none of them. 7. The velocity of the belt for maximum power is: a) VT/3m; b) VT/4m; c) VT/5m; d) vT/6m. 8. The decreasing the centrifugal tension in belts: a) increases power transmitted; b) decreases power transmitted; c) have no effect on the power transmitted; d) increases power transmitted upto a certain speed and then decreases. 9. When the belt is stationary, it is subjected to some tension, known as initial tension. The value of this tension is equal to the:
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Transcribed Image Text:Choice the correct answer of the following statements:
1. The power transmitted of two pulleys connected by an open belt or crossed belt is
a) directly proportional to their diameters; b) inversely proportional to their diameters;
proportional to the square of their diameters;
c) directly
d) inversely proportional to the square of their diameters.
2. Two pulleys of diameters d1 and d2 and at distance x apart are connected by means of an open belt
drive. The length of the belt is:
a) π/2 (d: + d₂) 2x + (d: + dz)/4x; b) n/2 (d₁-dz) 2x + (di-dz)/4x; c) n/2 (d: +d₂) 2x + (di-d₂}/4x;
d) π/2 (d₁-də) 2x + (d: +d₂)²/4x.
3. In a cone pulley, if the sum of radii of the pulleys on the driving and driven shafts is constant, then:
a) open belt drive is recommended; b) cross belt drive is recommended; c) both open belt drive and
cross belt drive are recommended; d) the drive is recommended depending upon the torque
transmitted.
4. Due to not slip of the belt, the power transmitted of the belt drive:
a) decreases; b) increases; c) does not change; d) none of the mentioned.
5. When two pulleys of same diameters are connected by means of an open belt drive, then the angle
of contact taken into consideration should be of the:
a) larger pulley; b) smaller pulley; c) average of two pulleys; d) none of the mentioned.
6. The power transmitted by a belt is maximum when the maximum tension in the belt (2T) is equal to:
a) Tc: b) 2Tc: e) 3Tc; d) none of them.
7. The velocity of the belt for maximum power is:
a) VT/3m¹; b) VT/4m; c) VT/5m; d) VT/6m.
8. The decreasing the centrifugal tension in belts:
a) increases power transmitted; b) decreases power transmitted; c) have no effect on the power
transmitted; d) increases power transmitted upto a certain speed and then decreases.
9. When the belt is stationary, it is subjected to some tension, known as initial tension. The value of
this tension is equal to the:
a) tension in the tight side of the belt; b) tension in the slack side of the belt; c) sum of the tensions
in the tight side and slack side of the belt; d) average tension of the tight side and slack side of the
belt.
10.. Due to not slip of the belt, the velocity ratio of the belt drive:
a) decreases; b) increases; c) does not change; d) none of the mentioned.
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