Top 50+ Solved Balancing MCQ Questions Answer
Q. Which of the following is true for centrifugal force causing unbalance?
a. Direction changes with rotation
b. Magnitude changes with rotation
c. Direction and magnitude both change with rotation
d. Direction and magnitude both remain unchanged with rotation
Q. If the unbalanced system is not set right then.
a. Static forces develop
b. Dynamic forces develop
c. Tangential forces develop
d. Radial forces develop
Q. What is the effect of a rotating mass of a shaft on a system?
a. Bend the shaft
b. Twist the shaft
c. Extend the shaft
d. Compress the shaft
Q. In a revolving rotor, the centrifugal force remains balanced as long as thecentre of the mass of the rotor lies ___________
a. Below the axis of shaft
b. On the axis of the shaft
c. Above the axis of shaft
d. Away from the axis of shaft
Q. Often an unbalance of forces is produced in rotary or reciprocating machinerydue to the ______
a. Centripetal forces
b. Centrifugal forces
c. Friction forces
d. Inertia forces
Q. The mass used to balance the mass defect is known as ______
a. Balancing mass
b. Defect mass
c. Replacement mass
d. Fixing mass
Q. In balancing of single-cylinder engine, the rotating unbalance is ____________
a. completely made zero and so also the reciprocating unbalance
b. completely made zero and the reciprocating unbalance is partially reduced
c. partially reduced and the reciprocating unbalance is completely made zero
d. partially reduced and so also the reciprocating unbalance
Q. Which of the following statement is correct?
a. In any engine, 100% of the reciprocating masses can be balanced dynamically
b. In the case of balancing of multicylinder engine, the value of secondary force is higher than the value of the primary force
c. In the case of balancing of multimass rotating systems, dynamic balancing can be directly started without static balancing done to the system
d. none of the mentioned
Q. If all the masses are in one plane, then what is the maximum no. of masseswhich can be placed in the same plane?
a. 3
b. 4
c. 6
d. No limitation
Q. Which of the following statements is correct about the balancing of amechanical system?
a. If it is under static balance, then there will be dynamic balance also
b. If it is under dynamic balance, then there will be static balance also
c. Both static as well as dynamic balance have to be achieved separately
d. None of the mentioned
Q. In a locomotive, the ratio of the connecting rod length to the crank radius iskept very large in order to
a. minimize the effect of primary forces
b. minimize the effect of secondary forces
c. have perfect balancing
d. start the locomotive conveniently
Q. Secondary forces in reciprocating mass on engine frame are
a. of same frequency as of primary forces
b. twice the frequency as of primary forces
c. four times the frequency as of primary forces
d. none of the mentioned
Q. For a V-twin engine, which of the following means can be used to balance theprimary forces?
a. Revolving balance mass
b. Rotating balance mass
c. Reciprocating balance mass
d. By the means of secondary forces
Q. The primary unbalanced force is maximum when the angle of inclination of thecrank with the line of stroke is
a. 0°
b. 90°
c. 180°
d. 360°