BMST Thermodynamics and Heat Transfer

Question 1

What is the formula to convert a temperature from Celsius to Fahrenheit?

Accepted Answer

°F = (°C × 9/5) + 32

Answer

The standard conversion is °F = (°C × 9/5) + 32. For example, 100°C = (100 × 1.8) + 32 = 212°F (boiling point of water).

Question 2

What is absolute zero in Celsius?

Accepted Answer

−273°C

Answer

Absolute zero (0 K) is −273.15°C, commonly rounded to −273°C. At this temperature, all molecular motion theoretically stops.

Question 3

Which method of heat transfer requires no medium and can travel through a vacuum?

Accepted Answer

Radiation

Answer

Radiation transfers heat via electromagnetic waves (infrared) and requires no medium. This is how the Sun's heat reaches Earth through the vacuum of space.

Question 4

When a substance changes from liquid to gas, what happens to the temperature during the phase change (at constant pressure)?

Accepted Answer

It remains constant

Answer

During a phase change, energy input goes into breaking intermolecular bonds rather than raising temperature. Temperature stays constant until the phase change is complete.

Question 5

A metal rod expands when heated. This is an example of:

Accepted Answer

Thermal expansion

Answer

Thermal expansion is the tendency of matter to increase in volume when heated. Most solids, liquids, and gases expand as temperature rises due to increased molecular motion.

BMST - Basic Math and Science Test Practice Test

BMST - Basic Math and Science Test Practice Test

BMST Thermodynamics and Heat Transfer