Statics Principles: Master the Fundamentals of Equilibrium and Forces

Question 1

In the International System of Units (SI), the unit of measurement for force is:

Accepted Answer

Newton

Answer

Joule

Answer

Pascal

Answer

Watt

Question 2

A moment is defined as the product of:

Accepted Answer

Force and perpendicular distance

Answer

Force and time

Answer

Mass and acceleration

Answer

Power and time

Question 3

A truss is a structural framework designed to:

Accepted Answer

Transfer loads to supports

Answer

Resist bending moments

Answer

Store energy

Answer

Reduce vibrations

Question 4

A cantilever beam is a beam that is:

Accepted Answer

Fixed at one end and free at the other

Answer

Supported at both ends

Answer

Clamped at one end and free at the other

Answer

Pinned at both ends

Question 5

Which of the following factors does NOT affect the bending moment in a beam?

Accepted Answer

Material of the beam

Answer

Applied load

Answer

Length of the beam

Answer

Support conditions

Question 6

The deflection of a beam is:

Accepted Answer

The vertical displacement of the beam under load

Answer

The angle of rotation of the beam

Answer

The change in length of the beam

Answer

The stress experienced by the beam

Question 7

Which structural type is commonly employed for long-span bridges due to its lightweight and efficient design?

Accepted Answer

Truss

Answer

Arch

Answer

Cantilever

Answer

Frame

Question 8

Which of the following quantities is a vector quantity?

Accepted Answer

Velocity

Answer

Mass

Answer

Temperature

Answer

Time

Question 9

A force of 100 N acts on a body at an angle of 30° to the horizontal. What is the vertical component of this force?

Accepted Answer

86.6 N

Answer

50 N

Answer

100 N

Answer

173.2 N

Question 10

What is the definition of the moment of a force about a point?

Accepted Answer

Force multiplied by the distance from the point to the line of action of the force

Answer

Force multiplied by the distance from the point to the centre of gravity of the body

Answer

Force multiplied by the angle between the force and the line of action of the force

Answer

Force multiplied by the time for which the force is applied

Question 11

Which of the following is NOT a necessary condition for equilibrium?

Accepted Answer

The body is moving with constant velocity

Answer

The sum of the forces acting on the body is zero

Answer

The sum of the moments acting on the body is zero

Answer

The body is at rest

Question 12

What is the definition of a couple?

Accepted Answer

A system of two equal and opposite forces acting parallel to each other at a distance apart

Answer

A system of two equal and opposite forces acting perpendicular to each other at a distance apart

Answer

A system of three or more forces acting on a body

Answer

A system of forces that produces only rotation

Question 13

Which of the following is NOT a fundamental force in statics?

Accepted Answer

Electromagnetic force

Answer

Gravitational force

Answer

Friction force

Answer

Tension

Question 14

A truss is a structure that is designed primarily to:

Accepted Answer

Carry loads without significant bending

Answer

Carry loads by bending

Answer

Resist twisting forces

Answer

Support weight from above

Question 15

A force of 100 N is applied to a lever with a moment arm of 0.5 m. What is the moment created?

Accepted Answer

50 Nm

Answer

100 Nm

Answer

150 Nm

Answer

200 Nm

Question 16

A cantilever beam is a beam that is:

Accepted Answer

Fixed at one end and free at the other

Answer

Fixed at both ends

Answer

Supported at one end and free at the other or with varying supports

Answer

Supported at both ends

Question 17

Identify the type of friction that resists motion before it starts:

Accepted Answer

Static friction

Answer

Sliding friction

Answer

Dynamic friction

Answer

Rolling friction

Question 18

A particle moves in a circle at a constant speed of 10 m/s. What is its acceleration?

Accepted Answer

10 m/s² towards the center of the circle

Answer

5 m/s² towards the center of the circle

Answer

0 m/s²

Answer

10 m/s² away from the center of the circle

Question 19

Which of the following is a law of motion?

Accepted Answer

Newton's second law

Answer

Hooke's law

Answer

Pascal's law

Answer

Ohm's law

Question 20

Which force is conservative?

Accepted Answer

Gravitational force

Answer

Air resistance

Answer

Frictional force

Answer

Tension force

Question 21

A car traveling at 20 m/s applies brakes and stops within 50 m. Calculate the car's acceleration.

Accepted Answer

-4 m/s²

Answer

4 m/s²

Answer

2 m/s²

Answer

-2 m/s²

Question 22

A force of 100 N acts on a body at an angle of 30° to the horizontal. What is the vertical component of the force?

Accepted Answer

86.6 N

Answer

100 N

Answer

173.2 N

Answer

50 N

Question 23

A beam is supported by two vertical ropes. The left rope exerts a force of 500 N and the right rope exerts a force of 300 N. What is the weight of the beam?

Accepted Answer

800 N

Answer

500 N

Answer

300 N

Question 24

A couple consists of two equal and opposite forces acting on a body. What is the moment produced by the couple?

Accepted Answer

Force × Perpendicular distance between the forces

Answer

Force × Sum of distances between the forces

Answer

Force / Distance between the forces

Answer

Force × Half the distance between the forces

Question 25

A block of mass m is placed on a rough horizontal surface. The coefficient of friction between the block and the surface is μ. What is the minimum force required to move the block?

Accepted Answer

μmg

Answer

μ/mg

Answer

mg

Answer

2μmg

Question 26

A cantilever beam is fixed at one end and subjected to a load at the other end. What is the formula that determines the maximum bending stress experienced by the beam?

Accepted Answer

Load × Distance from fixed end / Section modulus

Answer

Load × Distance from fixed end / Moment of inertia

Answer

Load / Distance from fixed end

Answer

Load × Distance from fixed end / Area of cross-section

Question 27

A truss is a structure composed of interconnected members. What is the primary purpose of a truss?

Accepted Answer

To transfer loads to supports efficiently while minimizing material usage

Answer

To enhance rigidity and structural stability

Answer

To reduce overall weight and cost

Question 28

A cable is suspended between two supports. What is the shape of the cable?

Accepted Answer

Catenary

Answer

Parabolic

Answer

Hyperbolic

Answer

Linear

Question 29

A pressure vessel is subjected to internal pressure. What is the main purpose of the vessel's wall thickness?

Accepted Answer

To withstand the internal pressure and prevent vessel failure

Answer

To provide insulation and thermal protection

Answer

To increase the vessel's internal volume

Question 30

A shaft is subjected to torque. What is the main purpose of a keyway on the shaft?

Accepted Answer

To prevent relative rotation between the shaft and attached components

Answer

To reduce friction between the shaft and attached component

Answer

To align the shaft with the attached component