# Multiple choice question for engineering

## Set 1

1. A body is consisted of __________ number of particles.

a) Infinite

b) Finite

c) Hundreds

d) Thousands

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2. A body’s all small particles have a small weight which is being applied by them to the body, which adds up to the total weight of the body.

a) True

b) False

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3. The all small weights that are being applied by all the infinite particles of the body act __________ to each other.

a) Parallel

b) Perpendicular

c) Collinear

d) Divergent

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4. The total of all the weights of small particles adds up to give the total body weight. This weight is the force vector which is being passed by ________

a) Axis of rotation

b) Axis of rolling

c) Centre of Gravity

d) Centre of mass

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5. The centre of gravity is the ratio of ________ to _________

a) The product of centroid and weight 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 weight to the total mass

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6. The x axis coordinate and the y axis coordinate of the centre of gravity are having different types of calculations to calculate them.

a) True

b) False

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7. The centre of mass 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

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8. The centre of volume 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 volume to the total weight

d) The product of centroid and volume to the total volume

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9. Determine the y coordinate of centroid of the line in the shape of parabola as shown.

a) 0.514m

b) 1.410m

c) 2.410m

d) 0.10m

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10. Volume is best given by ___________

a) Product of mass and density

b) Ratio of mass to density

c) Addition of mass and density

d) Subtraction of mass and density

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11. We use sometimes the measures to know the direction of moment. It is done by right handed coordinate system. Which is right about it(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

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12. If A is any vector with Ai + Bj + Ck then what is the y-axis component of the vector if we are using the vector math to calculate the centre of gravity?

a) B units

b) A units

c) C units

d) Square root of sum of squares of the three, i.e. A, B and C

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13. If the force vector F acting along the centre of gravity is having its x-axis component being equal to Z N, y-axis component be X N and z-axis component be Y N then vector F is best represented by?

a) Xi + Yj + Zk

b) Yi + Xj + Zk

c) Zi + Yj + Xk

d) Zi + Xj + Yk

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14. Which statement is right for force acting by the small particles of the body having it’s vector form as = Ai + Bj + Ck?

a) In rectangular components representation of any vector we have vector F = Ai + Bj + Ck

b) In rectangular components representation of any vector we have vector F = Ax + By + Cz

c) In rectangular components representation of any vector we have vector F = Fx + Fy + Fz

d) In rectangular components representation of any vector we have vector F = Fi + Fj + Fk

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15. Determine the x coordinate of centroid of the line in the shape of parabola as shown.

a) 0.410m

b) 1.410m

c) 2.410m

d) 0.10m

### View Answer

## Set 2

1. The centre of mass 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

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2. Mass is best given by _______

a) Product of volume and density

b) Ratio of mass to density

c) Addition of mass and density

d) Subtraction of mass and density

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3. We use sometimes the measures to know the direction of moment in the calculations of the centre of mass. It is done by right handed coordinate system. Which is right about it(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

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4. The total of all the masses of small particles adds up to give the total body mass. This mass lies along with gravity gives a force vector which is being passed by ________

a) Axis of rotation

b) Axis of rolling

c) Centre of Gravity

d) Centre of mass

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5. The all small masses that are being applied by all the infinite particles of the body act __________ to each other.

a) Parallel

b) Perpendicular

c) Collinear

d) Divergent

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6. A body’s all small particles have a small mass which is being applied by them to the body, which adds up to the total mass of the body.

a) True

b) False

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7. What is not the condition for the equilibrium in calculations involved in the determination of the centre of mass?

a) ∑Fx=0

b) ∑Fy=0

c) ∑Fz=0

d) ∑F≠0

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8. We first make equilibrium equations of the body by considering all the three dimensional forces and then the free body diagram is made and then equations are made to be applied so as to calculate the centre of mass.

a) The first part of the statement is false and other part is true

b) The first part of the statement is false and other part is false too

c) The first part of the statement is true and other part is false

d) The first part of the statement is true and other part is true too

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9. Determine the y coordinate of centroid of the wire in the shape of circle as shown.

a) 2R/π

b) 2/π

c) 2R/3

d) 2R/5

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10. If solving the question in 3D calculations is difficult, then use the 2D system and then equate the ratio of the product of the centroid of the section to its mass to the total mass of the body to the centre of mass.

a) True

b) False

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11. One of the use of the centre of mass or centroid is as in the simplification of the loading system the net force acts at the ___________ of the loading body.

a) Centroid

b) The centre axis

c) The corner

d) The base

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12. If the non-Uniform loading is of the type of parabola then?

a) The net load will not be formed as all the forces will be cancelled

b) The net force will act the centre of the parabola

c) The net force will act on the base of the loading horizontally

d) The net force will act at the centroid of the parabola

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13. If any external force also is applied on the distributed loading 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 to be considered, there would be a net force of the distribution, rest will be the external forces

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14. The body is sometimes acted by two or three force members. The difference between the two and the three force members is ________________

a) The former is collinear and the latter is parallel

b) The former is parallel and the latter is perpendicular

c) The former is perpendicular and the latter is collinear

d) The former is acting on two points in the body while the latter is on three points

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15. Determine the x coordinate of centroid of the wire in the shape of circle as shown.

a) 2R/π

b) 2/π

c) 2R/3

d) 2R/5

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## Set 3

1. Density is best given by _______

a) Product of volume and density

b) Ratio of mass to Volume

c) Addition of mass and density

d) Subtraction of mass and density

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2. If solving the question in 3D calculations is difficult, then use the 2D system and then equate the ratio of the product of the centroid of the section to its mass to the total mass of the body to the centroid.

a) True

b) False

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3. One of the use of the centroid is as in the simplification of the loading system the net force acts at the ___________ of the loading body.

a) Centroid

b) The centre axis

c) The corner

d) The base

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4. The use of centroid comes in picture as if the non-Uniform loading is of the type of parabola then what will be the best suited answer among the following?

a) The net load will not be formed as all the forces will be cancelled

b) The net force will act the centre of the parabola

c) The net force will act on the base of the loading horizontally

d) The net force will act at the centroid of the parabola

### View Answer

5. If any external force also is applied on the distributed loading 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 to be considered, there would be a net force of the distribution, rest will be the external forces

### View Answer

6. The x axis coordinate and the y axis coordinate of the centroid are having different types of calculations to calculate them.

a) True

b) False

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7. The centre of ____________ is the ratio of the product of centroid and volume to the total volume.

a) Centroid axis

b) Density

c) Mass

d) Volume

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8. If the force vector F acting along the centroid is having its x-axis component being equal to Z N, y-axis component be X N and z-axis component be Y N then vector F is best represented by?

a) Xi + Yj + Zk

b) Yi + Xj + Zk

c) Zi + Yj + Xk

d) Zi + Xj + Yk

### View Answer

9. Centroid of a body does depends upon the small weights of tiny particles. Which statement is right for force acting by the small particles of the body having it’s vector form as = Ai + Bj + Ck?

a) In rectangular components representation of any vector we have vector F = Ai + Bj + Ck

b) In rectangular components representation of any vector we have vector F = Ax + By + Cz

c) In rectangular components representation of any vector we have vector F = Fx + Fy + Fz

d) In rectangular components representation of any vector we have vector F = Fi + Fj + Fk

### View Answer

10. Determine the y coordinate of centroid of the area in the shape of circle as shown.

a) 4R/π

b) 2/π

c) 2R/3

d) 2R/5

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11. Centroid determination involves the calculations of various forces. In that forces are having various properties. That is force is developed by a support that not allows the ________ of its attached member.

a) Translation

b) Rotation

c) Addition

d) Subtraction

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12. What is not the condition for the equilibrium for the calculations used for the determination of the centroid in three dimensional system of axis?

a) ∑Fx=0

b) ∑Fy=0

c) ∑Fz=0

d) ∑F≠0

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13. The supports in the 3D are having more than three reaction forces. Because they are having three axis on which the components of the forces need to be zero.

a) The first part of the statement is false and other part is true

b) The first part of the statement is false and other part is false too

c) The first part of the statement is true and other part is false

d) The first part of the statement is true and other part is true too

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14. If any body is tied to three or more ropes, and then is allowed to achieve its equilibrium. Then the equilibrium achieved is achieved w.r.t what?

a) The three axis of the body

b) The ground

c) The ropes direction

d) The weight direction

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15. Determine the x coordinate of centroid of the area in the shape of circle as shown.

a) 4R/π

b) 2/π

c) 2R/3

d) 2R/5

### View Answer

## Set 4

1. ____________ is the phenomena that resist the movement of the two surfaces in contact.

a) Friction

b) Motion

c) Circular movement

d) Rotation

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2. The frictional force always acts ____________ to the surface of the application of the friction.

a) Tangential

b) Perpendicular

c) Parallel

d) Normal

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3. Dry friction is also called _____________

a) Column Friction

b) Coulomb Friction

c) Dry column friction

d) Surface friction

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4. Who gave the concept of Dry friction?

a) C.A. Coulomb

b) GA. Coulomb

c) C.P Coulomb

d) Albert Einstein

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5. At what conditions the dry friction occurs between the surfaces in contact?

a) When there is no lubricating fluid

b) When there is no friction fluid

c) When there is no adhesive fluid

d) When there is no cohesive fluid

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6. The phenomena of horizontal pull and push explains what?

a) Theory of friction

b) Theory of relativity

c) Theory of action

d) Theory of forces

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7. Theory of friction is explained over a block of weight W. Which of the following is the property of the surface on which block is present?

a) Non-rigid

b) Coloured red

c) Having density in negative

d) The motion of that block is always horizontal

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8. The block used to explain the theory of friction is kept over non-deformable surface.

a) True

b) False

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9. In the explanation of the theory of friction, the block used have an assumption. That is the upper portion of the block is considered to be rigid.

a) True

b) False

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10. The free body diagram used to explain the theory of dry friction is having ___________ distribution of both the normal forces and frictional surface.

a) Uneven

b) Even

c) Uniform

d) Equal

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11. For equilibrium the normal forces acts in which direction in the free body diagrams?

a) Vertically Upward

b) Vertically Downward

c) Horizontally Right

d) Horizontally Left

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12. What is not the condition for the equilibrium in free body diagram for calculation of the normal forces?

a) ∑Fx=0

b) ∑Fy=0

c) ∑Fz=0

d) ∑F≠0

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13. We first make equilibrium equations of the body by considering all the three dimensional forces acting on the section chosen and then the free body diagram is made and solved.

a) The first part of the statement is false and other part is true

b) The first part of the statement is false and other part is false too

c) The first part of the statement is true and other part is false

d) The first part of the statement is true and other part is true too

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14. Calculate the product of normal force and the coefficient of friction between the body and the surface.

a) 183N

b) 116N

c) 100N

d) 180N

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15. Determine the distance between the points of action of the forces, that is the normal force and the self-weight force in the given figure.

a) 9.08mm

b) 9.08cm

c) 9.08m

d) 9.8mm

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## Set 5

1. A ______________ body consists of a series of connected “simpler” shaped bodies.

a) Composite

b) Non-composite

c) Digital

d) Binary

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2. Composite materials are of no use for the chemical engineers.

a) False

b) True

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3. The composite materials are lighter than their constituent material.

a) False

b) True

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4. Composite materials can be of __________ shapes.

a) Any

b) Circular only

c) Rectangular only

d) Oval only

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5. Two of the things of the composite materials are to be known so that their properties can be varied. Which of the following is one of them?

a) Weight of the centre of gravity

b) Weight of the centre of body

c) Location of the centre of gravity

d) Location of the centre of mass

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6. The centre of mass for the 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

### View Answer

7. The total of all the masses of small particles adds up to give the total body mass of the composite body. This mass lies along with gravity gives a force vector which is being passed by ________

a) Axis of rotation

b) Axis of rolling

c) Centre of Gravity

d) Centre of mass

### View Answer

8. One of the use of the centre of mass or centroid of the composite bodies is as in the simplification of the loading system the net force acts at the ___________ of the loading body.

a) Centroid

b) The centre axis

c) The corner

d) The base

### View Answer

9. If any external force also is applied on the distributed loading 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 to be considered, there would be a net force of the distribution, and rest will be the external forces

### View Answer

10. Two of the things of the composite materials are to be known so that their properties 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

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11. A composite body is consisted of __________ number of particles.

a) Infinite

b) Finite

c) Hundreds

d) Thousands

### View Answer

12. We use sometimes the measures to know the direction of moment. 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

### View Answer

13. What is not the condition for the equilibrium in three dimensional system of axis for the composite bodies?

a) ∑Fx=0

b) ∑Fy=0

c) ∑Fz=0

d) ∑F≠0

### View Answer

14. Determine the x coordinate of centroid of the shape shown.

a) 0.410m

b) 1.410m

c) 2.410m

d) 0.10m