PHEF 0213 Test 1

Why is mastery of fundamental dimensions essential for engineers?

• To develop innovative designs

• To simplify equations into smaller units

• To analyze relationships and identify errors

• To standardize units globally

Fuel eficiency in automotive engineering (km/L) is based on which fundamental dimensions?

• L and T

• M and T

• L and M

• L only

How do engineers use dimensional analysis in relation to Young’s Modulus?

• To confirm the validity of the material’s thermal properties.

• To identify the relationship between force and area.

• To ensure the consistency of units in equations and validate material behaviour.

• To calculate the precise force required to deform materials.

The Boston Marathon is the oldest annual foot race that cover 26 miles and 385 yards. Express this distance in kilometers.

• 16.295 km

• 16.398 km

• 42.186 km

• 42.453 km

You recorded a distance of 12.05 meters. How many significant digits does this measurement have?

• 1

• 2

• 3

• 4

Which of the following is an example of a system in engineering?

• wheel

• steering wheel

• a car

• a spark plug

Which of the following principles is used to analyze why a machine might be overheating?

• Newton's Second Law of Motion

• Energy Conservation

• Equilibrium of Forces

• Electrical Conductivity

According to Newton's first law of motion, an object will remain at rest or in uniform motion unless acted upon by

• a force

• an acceleration

• a velocity

• a mass

Which of the following scenarios best illustrates Newton’s third law of motion?

• A book resting on a table

• A rocket launching into space

• A car accelerating on a highway

• A person sitting on a chair

Which of the following BEST described the characteristic of field forces?

• They require a medium like air or water to act.

• They act only at very short distances.

• They do not involve physical contact between the bodies.

• They only occur in the presence of friction.