# Multiple choice question for engineering

## Set 1

1. The measure of the body’s resistance to angular acceleration is called ___________

a) Mass moment of inertia of a body

b) Volume moment of inertia of a body

c) Line moment of inertia of a body

d) Gauss moment of inertia of a body

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2. Determine the mass moment of the area of the cylinder given below.

a) 0.5mR^{2}

b) 5mR^{2}

c) 0.2mR^{2}

d) 0.7mR^{2}

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3. We define the moment of inertia of a body as________

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4. Two of the things of the composite materials are to be known so that their mass 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

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5. We define the moment of inertia of a body in terms of volume of the body as______________

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6. We use the distance of the axis and the particles, and in that we apply parallel axis theorem. The distance in the parallel axis theorem is multiplied by_______

a) Area

b) Volume

c) Linear distance

d) Area/Volume

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7. One of the use of the centre of mass or centroid is as in the mass moment of inertia is that 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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8. If the non-Uniform loading is of the type of parabola then for calculating the mass moment of inertia for areas?

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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9. Determine the mass moment of the area of the cylinder given below.

a) Iz= 0.5mR^{2}

b) Iy = 0.5mR^{2}

c) Iz = 0.2mR^{2}

d) Iy = 0.7mR^{2}

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10. Which of the following is true?

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11. The body is sometimes acted by two or three force members and we need to find the mass moment of inertia for the same. 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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12. If any external force also is applied on the structure and we are determining the mass moment of inertia then what should we consider?

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

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14. Which of the following is true?

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15. We use sometimes the measures to know the direction of mass 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

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## Set 2

1. The joint in the trusses are generally formed by welding the materials at the ends of the trusses on a common plate. Which gives strength to the design. What is that plate called?

a) Gusset Plate

b) Ignified plate

c) Non-metallic plate

d) Gymnite plate

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2. Find the force in the member RQ of the frame shown below.

a) 707.1N

b) 500N

c) 505N

d) 784N

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3. Trusses lie in a single plane. And the calculations used to solve the forces are from vector math.

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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4. The transmission of the load on a certain type of a structure follow as from stringers to floor beams and then joints. Determine the structure.

a) Truss

b) Beam

c) Pillar

d) Bridge

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5. When the bridges are extended over long routes or distance then a rocker or a roller is used at the joints. As when the temperature is raised the elongations and the contractions of the joints part are not much affected if the rollers and rockers are used.

a) True

b) False

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6. Find the force in the member RS of the frame shown below.

a) 566N

b) 400N

c) 773N

d) 1090N

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7. There are no rules for the designing of the truss. But there are rules designing the bridges.

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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8. A truss is facing a two force member and both of them are in the opposite directions. And the truss is in equilibrium. And both of them are getting away from each other.The forces are called?

a) Compressive forces

b) Tensile Forces

c) Parallel and collinear forces with same direction of heading

d) The rotational forces

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9. A truss is facing a two force member and both of them are in the opposite directions. And the truss is in equilibrium. And both of them are coming towards each other. The forces are called __________

a) Compressive forces

b) Tensile Forces

c) Parallel and collinear forces with same direction of heading

d) The rotational forces

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10. Find the force in the member PR of the frame shown below.

a) 566N

b) 400N

c) 773N

d) 1090N

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11. Truss cannot be acted upon three force members. Because the truss in a single plane.

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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12. Find the force in the member QP of the frame shown below.

a) 707.1N

b) 500N

c) 505N

d) 784N

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13. Which of the following is true?

a) If we are considering the clockwise direction to be positive then the rotation along the counter clockwise direction is negative

b) If we are considering the clockwise direction to be negative then the rotation along the counter clockwise direction is also negative as no such assumptions can be taken

c) If we are considering the clockwise direction to be positive then the rotation along the counter clockwise direction is also positive as no such assumptions can be taken

d) If we are considering the clockwise direction to be negative then the rotation along the counter clockwise direction is neither positive nor negative as we only pre assumed the clockwise direction

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14. 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

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15. The ___________ forces do not cause the rotation.

a) Non-concurrent

b) Concurrent

c) Parallel

d) Non-Parallel

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## Set 3

1. If the whole truss is in equilibrium then all the joints which are connected to that truss is in equilibrium. This is known as:

a) Method of joints

b) Section method

c) Scalar field method

d) Vector equilibrium method

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2. Find the force in the member vertical at the right, joined by the hinge.

a) 750N

b) 450N

c) 250N

d) 200N

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3. The free body diagram of which part of the section of the truss is made to make use of method of joints?

a) Joints

b) Truss

c) The whole structure

d) The combination of joint and the whole structure

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4. For applying the method of joint at joints the forces need to coplanar.

a) False

b) True

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5. For applying the method of joint at joints the forces need to be concurrent.

a) False

b) True

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6. Find the force in the member RQ.

a) 750N

b) 450N

c) 250N

d) 200N

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7. We use the method of joint to find the forces acting over the joints. In this we start from the joint having at least one known force and at the most two unknown forces.

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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8. We use the method of joint to find the net force acting over the entire structure.

a) True

b) False

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9. Which of the following is correct?

a) To know the direction of the unknown force we take assumption of it

b) The direction of the unknown force is known to us already

c) The direction of the unknown can’t be determined

d) The direction of the unknown is of no use, it is not founded

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10. The magnitude of the unknown force can’t be known. But the direction can be founded out.

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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11. Find the force in the member PQ.

a) 750N

b) 450N

c) 250N

d) 200N

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12. What is after taking the assumption of the direction of the force, the direction comes opposite?

a) The assumption made was wrong and the question can’t be solved further

b) The assumptions are not to be taken

c) The direction is in the opposite sense, and hence the direction is known to us

d) The direction will be already given to us, no need of assuming

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13. The resultant of three equal vectors having mutual angles being 120 degree and being originated from a single point is zero.

a) True

b) False

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14. The magnitude of the resultant of the two vectors is always:

a) Greater than one of the vector’s magnitude

b) Smaller than one of the vector’s magnitude

c) Depends on the angle between them

d) Axis we choose to calculate the magnitude

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15. Find the force in the member PR.

a) 750N

b) 450N

c) 250N

d) 200N

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## Set 4

1. We use the method of joints when the members on which the force to be found are few in number.

a) True

b) False

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2. The method of section cuts the whole structure of trusses into section and then uses the cut out portion for the calculations.

a) True

b) False

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3. The method of joints helps us to find out the unknown force in the trusses joint. And the method of section helps us to make the calculation of the direction of the zero members.

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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4. Method of section cuts the whole structure of trusses into section and then uses the cut out portion for the calculations of the unknown forces. For this method, at most two forces must be collinear.

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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5. The determination of the truss’s support reaction is done first and then the section is isolated for the method of the section.

a) The first step is right but the second one is wrong

b) The first step is wrong and the second one is wrong too

c) The first step is right and the second one is right too

d) The first step is wrong but the second one is right

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6. Why the determination of the support reaction needs to be done before isolating the section?

a) This reduces the calculation and also the labour

b) This makes the isolated section more complicated

c) This results in reduction on the formulas used

d) This procedure is not done at all, it of no need

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7. The free diagram of the section of the truss is made for the section having the least number of the forces. This is done as to make the calculations easy.

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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8. We have three method to solve for the unknown force in the trusses. They are method of section, method of joints and rotational vector method.

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. The free body diagram of which part of the section of the truss is made to make use of method of sections?

a) Joints

b) Truss

c) The whole structure

d) Any section can be used

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10. Determine the force in members UT.

a) 1980N

b) 800N

c) 2200N

d) 1100N

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11. Determine the force in members UR.

a) 1980N

b) 800N

c) 2200N

d) 1100N

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12. Determine the force in members QR.

a) 1980N

b) 800N

c) 2200N

d) 1100N

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13. The system of the collinear and the parallel force are simplified as:

a) The simplified collinear force system gives us a net force and the parallel force system gives us a simplified force, and then we add it vectorially

b) Such simplification is not possible

c) The simplification is usually done by not considering the directions of the both

d) The simplification is done by considering the rotations only

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14. The couple and the other two force systems can be easily simplified.

a) Statement is wrong

b) Statement is right

c) Statement is right if we remove ‘couple’ part

d) Statement is right if we remove ‘force’ part

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15. The resultant force is equal to the _______ of all the forces.

a) Sum

b) Product

c) Subtraction

d) Division

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## Set 5

1. Couple is having a combination of two forces. They are different in magnitude.

a) True

b) False

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2. Determine the couple moment acting on the beam shown.

a) 500Nm

b) 1500Nm

c) 740Nm

d) 50Nm

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3. The distance between the forces acting in the couple is ____________

a) Infinity

b) Zero

c) A finite distance

d) A circular loop

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4. The resultant force acting in the couple is _________

a) Zero

b) Infinite

c) Twice the magnitude of the single force

d) Half the magnitude of the single force

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5. A man is travelling in the car. He is driving the car. If he is taking a turn in the road. He is applying force to the steering wheel by holding the wheel with his both hands. The steering wheel is facing a moment of force.

a) True

b) False

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6. Which of the following is correct for the moment of couple M caused by two forces of same magnitude F and are separated by a distance of r?

a) M = rxF

b) M = r.F

c) M = -(rxF)

d) M = -(r.F)

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7. A couple moment is a _______ vector.

a) Gradient

b) Scalar

c) Del

d) Free

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8. Determine the couple moment acting on the beam shown.

a) 20KNm

b) 21KNm

c) 22KNm

d) 19KNm

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9. Which of the following is correct?

a) The couple moment depends on the axis of rotation

b) The couple moment depends directly on the radius vector of forces

c) The couple moment depends only on the distance vector between the forces

d) The couple moment’s direction is given by the left hand rule

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10. If the forces acting on the couple are in the same direction, that is they are not in the opposite direction as always they are, then?

a) The direction of the forces doesn’t determine the moment

b) The couple moment will be maximum

c) The couple is not possible

d) No change occurs

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11. Determine the couple moment acting on the pipe shown.

a) -130Nm

b) 130Nm

c) -120Nm

d) 120Nm

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12. The resultant couple moment is ____________ sum of various couples acting on the body.

a) Vector

b) Scalar

c) Scalar Triple

d) Dot

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13. Determine the couple moment acting on the triangular plane shown.

a) 1600Nm

b) 100Nm

c) 2600Nm

d) 600Nm

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14. If two forces magnitude F each are acting in the Cartesian coordinate and are acting at the points A(3,3) and B(-3,3). They are heading towards negative z direction and positive z direction respectively. The distance between them is given as r. The radius vectors of the force at A and B are Ra and Rb respectively. Then the moment is given as:

a) (Ra-Rb).F

b) (Rb-Ra).F

c) (Ra-Rb)xF

d) (Rb-Ra)xF

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15. Determine the couple moment acting on the pipe shown.

a) 108j + 144k Nm

b) -108j + 144k Nm

c) 108j – 144k Nm

d) -108j – 144k Nm