# Multiple choice question for engineering

## Set 1

1. The pivots are generally used in __________

a) Belts

b) Columns

c) Beams

d) Machines

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2. Determine the moment about the point Q by the force shown as 400N.

a) -98.6kN

b) 98.6kN

c) -98.6iN

d) -98.6jN

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3. The collar bearings are generally used in __________

a) Belts

b) Columns

c) Beams

d) Machines

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4. The pivots and collar bearings are used as to support the axial load on the rotating shaft.

a) False

b) True

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5. A phenomena is there in these collar bearings and pivots, which is very helpful in the supporting of the machines, and that is _____________

a) Column Friction

b) Coulomb Friction

c) Dry column friction

d) Surface friction

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6. At what conditions does the Coulomb friction occurs between the surfaces in contact of collar bearings or pivots?

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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7. We first make equilibrium equations of the sections involving the collar bearings or pivots 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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8. To know the rotations involved in the disks we use right handed coordinate system, in that system which of the following is followed (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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9. In the calculations involving the collar bearings and the pivot bearings, we use cross product. In that mathematically, for two vectors A and B of any magnitude, the cross product of both, i.e. AxB = given by:

a) |A||B|sinØ

b) |A||B|

c) |A||B|cosØ

d) |A||B|sin(180°+Ø)

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10. In the calculations of the bearings we often use vector math. So for those systems which of the following is true?

a) i x i =1

b) j x i = -j

c) k x j = -i

d) k x k = 1

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11. The moment is the cross product of which two vectors in the calculations of the pivots and disks?

a) Force and Radius vectors

b) Radius and Force vectors

c) Force and Radius scalars

d) Radius and Force scalars

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12. The basic type of motion of a body is translation motion only.

a) True

b) False

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13. Principle of transmissibility is somehow applied to the collar bearings. It states that:

a) It states that the force acting on the body is a sliding vector

b) It states that the force acting on the body is a rolling vector

c) It states that the force acting on the body is a wedging vector

d) It states that the force acting on the body is a unit vector

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14. Coplanar forces are not easily simplified in the simplification of the force and couple system in the calculations of forces in the pivots and collar bearings.

a) True

b) False

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15. Determine the moment about the point P.

a) 460Nm

b) 500Nm

c) 705Nm

d) 0Nm

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## Set 2

1. A 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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2. In the diagram given below, coordinates of D is (1, -2, 2), C (-2, 0, 0) and B are as shown. The dark region is the cables holding the weight of 600N at origin. Find the tension in the AD section.

a) 900N

b) 693N

c) 646N

d) 0N

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3. A couple moment is developed when _______ of the attached member is prevented.

a) Translation

b) Rotation

c) Addition

d) Subtraction

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4. What is not the condition for the equilibrium in three dimensional system of axis?

a) ∑Fx=0

b) ∑Fy=0

c) ∑Fz=0

d) ∑F≠0

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5. We first make equilibrium equations of the body by considering all the three dimensional forces 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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6. If solving the question in 3D calculations is difficult, then use the 2D system and then equate the total net force to zero.

a) True

b) False

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7. ∑Fx=0, ∑Fy=0 and ∑Fz=0 are vector equations for the three dimensions. They are satisfied when the body is achieved it state of equilibrium.

a) True

b) False

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8. If the resolved force or the force which you get as the answer after solving the question is negative, then what does this implies?

a) The force is in the reverse direction w.r.t the direction set in the free body diagram

b) The force is not in the reverse direction w.r.t the direction set in the free body diagram

c) The force component is not possible

d) The force is possible, but in the direction perpendicular to the resultant force

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9. 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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10. 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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11. The single pin, single bearing and single hinge resist _______

a) Force

b) Couple moments

c) Both force and couple moments

d) Inertia

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12. If the supports are properly aligned then the reaction forces developed are adequate to support the body.

a) Statement is true only in 2D

b) Statement is true only in 3D

c) Statement is true throughout

d) Statement is true only in 1D

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13. Find the tension in the cable AC.

a) 23.6N

b) 55N

c) 89N

d) -29N

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14. Determine the value of the q, parallel to the z axis. That is the point of intersection of the projections of the points A, B and C parallel to the xy plane. With the distance between the tri-section point and the points A, B and C be equal to 0.6m.

a) 51.9cm

b) 51.9mm

c) 51.9m

d) 5.19mm

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15. If the supports are not properly aligned then the reaction forces developed are adequate to support the body.

a) Statement is true only in 2D

b) Statement is true only in 3D

c) Statement is false throughout

d) Statement is true only in 1D

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## Set 3

1. Find the moment of the force about the point R.

a) 5000Nm

b) 5550Nm

c) 6000Nm

d) 7000Nm

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2. How far from the shaft at P a 200N vertical force must act so as to create the same moment as produced by the 75N, at P?

a) 1.2m

b) 1.125m

c) 0.6m

d) 0m

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3. Find the moment along the point at the mid of the line SR.

a) 1200Nm

b) 600Nm

c) 0Nm

d) 1400Nm

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4. 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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5. 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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6. The ___________ forces do not cause the rotation.

a) Non-concurrent

b) Concurrent

c) Parallel

d) Non-Parallel

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7. Choose the correct one.

a) In a coplanar system the moment of the force is chose about a point instead of axis

b) In a coplanar system the moment of the force is chose about an axis instead of a point

c) In a 3D system the moment of the force is chose about a point instead of axis

d) In a 3D system the moment of the force is chose about an axis which is perpendicular ot the direction of the force

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8. Determine the moment about the point S.

a) 0Nm

b) 350Nm

c) 100Nm

d) 200Nm

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9. Moments can be added like scalars that is it can be added algebraically with proper signs.

a) True

b) False

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10. If you are opening the door, then the force you apply is greater if you open it from the part closer to the hinges.

a) True

b) False

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11. Which of the following is correct in the determination of the moment direction by curling of wrist?

a) The thumb represents the direction of the force

b) The thumb represents the direction of the moment

c) The fingers represents the direction of the force

d) The direction in which you curl your wrist is towards the direction of the distance from point of contact of force to the axis of rotation.

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12. Find the moment along R.

a) 1200Nm

b) 600Nm

c) 0Nm

d) 1400Nm

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13. For the below diagram determine the magnitude of the horizontal force applied at R which creates the same moment at P as by 75N.

a) 110N

b) 43.1N

c) 60N

d) 0N

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14. Which of the following is true?

a) Total moment of various forces acting on the body is the vector sum of all moments in 3D

b) Total moment of various forces acting on the body is the algebraic sum of all moments in 3D

c) Total moment of various forces acting on the body is always zero in any dimension

d) Total moment of various forces acting on the body is the vector sum of all moments which is perpendicular to each other forces whatever be the dimensions

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15. The moment axis is in the direction parallel to the plane of the force and the distance.

a) True

b) False

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## Set 4

1. The Pascal law states that liquid at rest applies pressure at a point is ________ in all directions.

a) Same

b) Un-same

c) Not matching

d) Matching but not equal

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2. Determine the location of the hydrostatic force acting on the submerged rectangular plate PaPb. Plate has width of 1.5m. Density of water 1000kg/m^{3}.

a) 1.29m

b) 0.29m

c) 0.9m

d) 1.9m

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3. The magnitude of the pressure of the fluid is not dependent on the _________

a) Force

b) Area

c) Specific Weight

d) Temperature

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4. The Pascal’s law is applicable to the liquid which is __________________

a) Compressible

b) In-compressible

c) Solid in phase

d) Super-compressive

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5. Gases are ________________ fluids.

a) Compressible

b) In-compressible

c) Solid in phase

d) Super-compressive

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6. Pressure acts _____________ to the surface of the body.

a) Normal

b) Linear

c) Parallel

d) Coplanar

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7. For the determination of the fluid pressure the body to be experimented is ___________ in the liquid.

a) Immersed

b) Non-immersed

c) Parallel

d) Normal

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8. What is a collinear system of forces for the system of the fluid liquids?

a) The force system having all the forces parallel to each other

b) The force system having all the forces perpendicular to each other

c) The force system having all the forces emerging from a single point

d) Forces cannot form a collinear system of forces, it is not possible

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9. The system of the collinear and the parallel force for the calculations of the equations in the determination of the fluid pressure 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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10. What is not the condition for the equilibrium in the determination of the equations of the fluid pressures?

a) ∑Fx=0

b) ∑Fy=0

c) ∑Fz=0

d) ∑F≠0

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11. If solving the question in 3D calculations is difficult, then use the 2D system to determine the equations of the fluid pressure.

a) True

b) False

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12. When the body is in equilibrium beneath the liquid then which of the following is true?

a) We equate all the components of the forces acting on the body equal to their resultant vector’s magnitude

b) We equate all the components of the forces acting on the body equal to their resultant vector’s magnitude square

c) We equate all the components of the forces acting on the body equal to their resultant vector’s magnitude square root

d) We equate all the components of the forces acting on the body equal to zero

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13. State true or false. We first make equilibrium equations for the fluid pressure and then the free body diagram and then solve the question?

a) True

b) False

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14. ∑Fx=0, ∑Fy=0 and ∑Fz=0 are vector equations for the determination of the equilibrium equations for the fluid pressure in the body immersed in the liquid.

a) True

b) False

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15. Determine the resultant hydrostatic force acting on the submerged rectangular plate PaPb. Plate has width of 1.5m. Density of water 1000kg/m^{3}.

a) 154.5 kN/m

b) 54.5 kN/m

c) 14.5 kN/m

d) 112.5 kN/m

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## Set 5

1. Frames and machines are two types of structural figures which are often composed of pin connected ___________ member.

a) Multi-force

b) Multi-couple

c) Multi-moment

d) Multi-valued

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2. ___________ are used as support loads.

a) Frames

b) Machines

c) Truss

d) Beam

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3. Find the horizontal reaction at Q.

a) 6KN

b) 0KN

c) 4KN

d) 12KN

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4. ________ contains moving parts.

a) Frames

b) Machines

c) Truss

d) Beam

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5. Machines are so designed to ___________ and alter the effects of the forces.

a) Transmit

b) Make-out

c) Turn over

d) Catch-up

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6. Find the horizontal reaction at R.

a) 6KN

b) 0KN

c) 4KN

d) 12KN

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7. The forces acting on the joints and on the members are determined by the simple equilibrium equations, which are used in the usual beams and trusses.

a) True

b) False

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8. Forces acting on the supports and the joints are not important to determine, in the frames and machines.

a) False

b) True

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9. The forces obtained at the joints and the members of the machines are very important. They are used for:

a) The designing the size of the members, connections done in the frames and machines

b) To determine the stress bearing capacity

c) To know the strain bearing capacity

d) They are not important

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10. There are no free body diagram used in the calculations of the forces at the supports and at the joints. Because the free body diagrams of a machines are so hard to be made.

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. Which of the following is correct for the frames in 2D and machines in 3D?

a) The application of the conditions of the equilibrium of the body is valid only in the 2D

b) The application of the conditions of the equilibrium of the body is valid only in the 3D

c) The application of the conditions of the equilibrium of the body is valid only in the 1D

d) The application of the conditions of the equilibrium of the body is valid throughout

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12. Find the vertical reaction at R.

a) 6KN

b) 0KN

c) 4KN

d) 12KN

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13. If a force applied at any point in its line of action and is still creating the same moment about any fixed point say P, then the force is said to be______________

a) Couple

b) Sliding vector

c) Slider couple

d) Couple slider

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14. If a force applied at any point in its line of action and is still creating the same moment about any fixed point say P, then the force is said to be sliding vector. What is the name of this property?

a) Associative property

b) Distributive property

c) Negative associative property

d) Principle transmissibility of the force

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15. Find the vertical reaction at Q.

a) 6KN

b) 0KN

c) 4KN

d) 12KN