Q.1.
Composite materials are of no use for any engineers.
- a) False
- b) True
Q.2.
What is not the condition for the equilibrium in three dimensional system of axis for the composite bodies if we are determining the moment of inertia for them?
- a) ∑Fx=0
- b) ∑Fy=0
- c) ∑Fz=0
- d) ∑F≠0
Q.3.
We sometimes use the moment caused by the force so as to determine the moment of inertia of the body. The moment is the cross product of which two vectors?
- a) Force and Radius vectors
- b) Radius and Force vectors
- c) Force and Radius scalars
- d) Radius and Force scalars
Q.4.
Determine the moment of area of the area below about x-axis.
- a) 101 x 106 mm4
- b) 1 x 106 mm4
- c) 10 x 106 mm4
- d) 15 x 106 mm4
Q.5.
Composite materials can be of __________ shapes for the determination of the moment of composite areas.
- a) Any
- b) Circular only
- c) Rectangular only
- d) Oval only
Q.6.
If any external force also is applied on the distributed loading on which the moment of inertia is to be determined on the composite body then?
- a) The net force will act at the centroid of the structure only
- b) The net load will not be formed as all the forces will be cancelled
- c) The net force will act on the base of the loading horizontally
- d) The net force will not be considered, there would be a net force of the distribution, and rest will be the external forces
Q.7.
Determine the moment of area of the area below its centroid axis.
- a) 28.125 x 106 mm4
- b) 1 x 106 mm4
- c) 10 x 106 mm4
- d) 17 x 106 mm4
Q.8.
Two of the things of the composite materials are to be known so that their moment of inertia can be varied. Which of the following is one of them?
- a) Weight of the centre of gravity
- b) Weight of the body
- c) Location of the centroid of gravity
- d) Location of the centre of mass
Q.9.
The number of a particle does affect the moment of inertia. A composite body is consisted of __________ number of particles.
- a) Infinite
- b) Finite
- c) Hundreds
- d) Thousands
Q.10.
We use sometimes the measures to know the direction of moment of inertia. It is done by right handed coordinate system. Which is right about it for the composite bodies (consider the mentioned axis to be positive)?
- a) Thumb is z-axis, fingers curled from x-axis to y-axis
- b) Thumb is x-axis, fingers curled from z-axis to y-axis
- c) Thumb is y-axis, fingers curled from x-axis to z-axis
- d) Thumb is z-axis, fingers curled from y-axis to x-axis
Q.11.
We often use the centre of mass of the composite area to calculate the moment of inertia. The centre of mass for these composite body is the ratio of ________ to _________
- a) The product of centroid and mass to the total weight
- b) The addition of centroid and weight to the total weight
- c) The subtraction of centroid and weight to the total weight
- d) The product of centroid and mass to the total mass