# Mechatronics solved MCQs

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## 1. Which of the following is incorrect regarding inertia force?

a. imaginary force

B. acts upon a rigid body

c. brings the body to equilibrium

d. same direction as of accelerating force

a. true

B. false

a. i. α/f

B. i. α/m.g

c. i/m.k

d. m.k/i

## 4. D-Alembert’s principle is used for which of the following?

a. change static problem into a dynamic problem

B. change dynamic problem to static problem

c. to calculate moment of inertia of rigid bodies

d. to calculate angular momentum of a system of masses

## 5. 2 D ALEMBERT'S PRINCIPLE - DYNAMIC ANALYSIS IN RECIPROCATING ENGINES

a. reversed effective force

B. net force

c. coriolis force

d. resultant force

## 6. A body remains in equilibrium if

a. inertia force is applied in the same direction to the resultant force

B. inertia force is applied in the direction opposite to the resultant force

c. inertia force is applied in the direction perpendicular to the resultant force

d. inertia force is applied in the direction parallel to the resultant force

a. true

B. false

a. i.α/f

B. i.α/m.g

c. i/m.k

d. m.k/i

## 9. Considering a four bar chain with each link having linear and angular acceleration, applying D-Alembert’s principle will never result in which of the following member?

a. 2- force member

B. 3- force member

c. 4 – force member

d. non accelerating member

a. true

B. false

a. tdc to bdc

B. bdc to tdc

c. midway to tdc

d. bdc to midway

a. tdc to bdc

B. bdc to tdc

c. midway to tdc

d. bdc to midway

## 13. When the piston is accelerated, the piston effort is given by which of the following the equation?

a. f(l) – f(i)

B. f(l) + f(i)

c. f(l) ± f(i)

d. f(l) – f(i) + r(f)

## 14. In the presence of frictional resistance, the expression for piston effort is

a. f(l) – f(i)

B. f(l) + f(i)

c. f(l) ± f(i) – r(f)

d. f(l) – f(i) + r(f)

## 15. Crank effort is the product of crank pin radius and

a. thrust on sides

B. crankpin effort

c. force acting along connecting rod

d. piston effort

a. true

B. false

a. 17.56 n

B. 19.2 n

c. 18.53 n

d. 18.00 n

a. 88000 n

B. 90560 n

c. 78036 n

d. 88357 n

a. true

B. false

## 20. For a multicylinder engine, the coefficient of fluctuation of speed would vary with

a. number of cylinders

B. remains unaffected

c. length of connecting rod

d. input temperature

a. the gases

B. on the gases

c. piston wall

d. valve

## 22. For a 4 cylinder engine, when the pressure inside the cylinders exceeds the atmospheric pressure then.

a. work is done by the gases

B. work is done on the gases

c. work is done on the piston wall

d. work is done by the piston wall

## 23. In a punching press, which of the following quantity is constant?

B. torque

c. angular velocity

d. angle of rotation

a. true

B. false

## 25. The maximum shear force required for punching depends on

a. sheared area

B. length of the plate

c. speed of the flywheel