This set of Machine Dynamics Multiple Choice Questions & Answers (MCQs) focuses on “Ritterhaus Construction”.
1. If OC is the crank and PC is the connecting rod rotating in clockwise direction in the figure given below, then triangle OCM is known as ________
a) Klein’s velocity diagram
b) Klein’s acceleration diagram
c) Ritterhaus’ velocity diagram
d) Ritterhaus’ acceleration diagram
Explanation: Since the crank is rotating in the clockwise direction, then the velocity of C will be perpendicular to OC and it’s value is given by w2.OC, hence triangle OCM forms a velocity polygon.
2. Ritterhaus’ construction is used when the motion of the crank is linear shm.
Explanation: Ritterhaus’ construction is used when the crank is undergoing a motion which has uniform angular velocity.
Explanation: Total acceleration is the vector sum of radial and tangential components radial component is given by ω2.CQ and tangential component is given by ω2.QN.
Explanation: Acceleration at D is the vector sum of radial acceleration and tangential acceleration components. Hence the net acceleration is ω2.OD2.
5. In which of the following cases Ritterhaus’ construction can be used?
a) Crank has a uniform angular velocity
b) Crank has a uniform angular acceleration
c) Lever has a uniform angular acceleration
d) When the motion is SHM
Explanation: Ritterhus’ construction can be used in both the cases, i.e when the crack has both uniform and non uniform angular velocity.
Explanation: In the figure, the triangle OCM is known as the velocity diagram, referring to that will provide us the velocity of point P with respect to C. Velocity if C wrt to O is ω × OC and ω × OM is velocity of P wrt to O.
Explanation: In the figure, the triangle OCM is known as the velocity diagram, referring to that will provide us the absolute velocity of point P. Velocity if C wrt to O is ω × OC and ω × OM is velocity of P wrt to O.
8. Ritterhaus’ construction is used to determine graphically the velocity and acceleration of reciprocating parts of an IC engine.
Explanation: The velocity and acceleration of the reciprocating parts of the steam engine or internal combustion engine may be determined by the graphical method or analytical method, Ritterhaus’ construction provides graphical solution.
9. Which of the following construction methods is not used to calculate the velocity and acceleration of reciprocating parts of the internal combustion engine?
a) Klien’s construction
b) Ritterhaus’s construction
c) Bennett’s construction
d) D-Alembert’s constructions
Explanation: D-Alembert’s principle is used to convert a dynamic mechanic problem to a static problem with the help of inertia forces while the other three constructions are used to determine the velocity and acceleration of reciprocating parts of IC engines.
Sanfoundry Global Education & Learning Series – Machine Dynamics.
To practice all areas of Machine Dynamics, here is complete set of 1000+ Multiple Choice Questions and Answers.
Participate in the Sanfoundry Certification contest to get free Certificate of Merit. Join our social networks below and stay updated with latest contests, videos, internships and jobs!