Theory of Machine Which one of the following is an exact straight line mechanism using lower pairs? Grasshopper mechanism Watt’s mechanism Peaucellier’s mechanism Robert’s mechanism Grasshopper mechanism Watt’s mechanism Peaucellier’s mechanism Robert’s mechanism ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The Klein's method of construction for reciprocating engine mechanism Utilizes a quadrilateral similar to the diagram of mechanism for reciprocating engine Enables determination of Cariole’s component Is a simplified form of instantaneous center method Is based on acceleration diagram Utilizes a quadrilateral similar to the diagram of mechanism for reciprocating engine Enables determination of Cariole’s component Is a simplified form of instantaneous center method Is based on acceleration diagram ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The secondary unbalanced force due to inertia of reciprocating parts in a reciprocating engine is given by (where m = Mass of reciprocating parts, ω = Angular speed of crank, r = Radius of crank, θ = Angle of inclination of crank with the line of stroke, and n = Ratio of the length of connecting rod to radius of crank) m.ω².r (sin 2θ/n) m.ω².r (cos 2θ/n) m.ω².r sinθ m.ω².r cosθ m.ω².r (sin 2θ/n) m.ω².r (cos 2θ/n) m.ω².r sinθ m.ω².r cosθ ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine Which of the following is an inversion of a double slider crank chain? Oldham's coupling Scotch yoke mechanism Elliptical trammel All of these Oldham's coupling Scotch yoke mechanism Elliptical trammel All of these ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The height of a Watt's governor is Directly proportional to speed Inversely proportional to (speed)² Inversely proportional to speed Directly proportional to (speed)² Directly proportional to speed Inversely proportional to (speed)² Inversely proportional to speed Directly proportional to (speed)² ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine A shaft has an attached disc at the centre of its length. The disc has its centre of gravity located at a distance of 2 mm from the axis of the shaft. When the shaft is allowed to vibrate in its natural bow-shaped mode, it has a frequency of vibration of 10 rad/s. When the shaft is rotated at 300 r.p.m., it will whirl with a radius of 2 mm 2.22 mm 2.50 mm 3.0 mm 2 mm 2.22 mm 2.50 mm 3.0 mm ANSWER DOWNLOAD EXAMIANS APP
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