McqMate

Q. |
## For the secondary balancing of the engine, which of the condition is necessary? |

A. | Secondary force polygon must be close |

B. | Secondary force polygon must be open |

C. | Primary force polygon must be close |

D. | Primary force polygon must be open |

Answer» A. Secondary force polygon must be close |

3.8k

0

Do you find this helpful?

1

View all MCQs in

Dynamics of MachineryNo comments yet

- Let the disturbing mass be 50 Kg, with radius of rotation = 0.1m, if one of the balancing mass is 30 Kg at a radius of rotation 0.1m then find the other balancing mass situated at a distance of 0.2m.
- A V-twin engine has the cylinder axes at 90 degrees and the connecting rods operate a common crank. The reciprocating mass per cylinder is 11.5 kg and the crank radius is 7.5 cm. The length of the connecting rod is 0.3 m. If the engine is rotating at the speed is 500 r.p.m. What is the value of maximum resultant secondary force in Newtons?
- A V-twin engine has the cylinder axes at 90 degrees and the connecting rods operate a common crank. The reciprocating mass per cylinder is 23 kg and the crank radius is 7.5 cm. The length of the connecting rod is 0.3 m. If the engine is rotating at the speed is 500 r.p.m. What is the value of maximum resultant secondary force in Newtons?
- A V-twin engine has the cylinder axes at 90 degrees and the connecting rods operate a common crank. The reciprocating mass per cylinder is 34.5 kg and the crank radius is 7.5 cm. The length of the connecting rod is 0.3 m. If the engine is rotating at the speed is 500 r.p.m. What is the value of maximum resultant secondary force in kN?
- In balancing of single-cylinder engine, the rotating unbalance is ____________
- In order to achieve stability, the sum of secondary forces and secondary couples must be ------- and their respective polygons must be …......
- The numerical values of the secondary forces and secondary couples couples may be obtained by considering the ___________
- For occurrence of free torsional vibration which of the condition is necessary?
- For occurrence of free torsional vibration in a three rotor system which of the condition is necessary?
- In a multicylinder inline engine, each imaginary secondary crank with a mass attached to the crankpin is inclined to the line of stroke at which angle?