Temperature and Pressure Conversion Mastery

1. Kelvin and Celsius temperature steps (size of 1 unit) are:

Different sizes

The same size

Kelvin steps are twice as large

Celsius steps are half as large

Concept: Celsius vs Kelvin increments. A change of 1 K equals a change of 1 °C. The difference is the zero point, not the step size.

Explanation

Concept: Celsius vs Kelvin increments. A change of 1 K equals a change of 1 °C. The difference is the zero point, not the step size.

2. Convert 25 °C to K (approx):

25 K

248 K

298 K

325 K

Concept: °C to K offset. K = °C + 273 (more precisely 273.15). So 25 °C is about 298 K.

Explanation

Concept: °C to K offset. K = °C + 273 (more precisely 273.15). So 25 °C is about 298 K.

3. 0 °C is approximately 273 K.

True

False

Concept: Reference point. The freezing point of water is 0 °C, which corresponds to about 273 K. This anchor helps many conversions.

Explanation

Concept: Reference point. The freezing point of water is 0 °C, which corresponds to about 273 K. This anchor helps many conversions.

4. To convert from Kelvin to Celsius, you ______ about 273.

Concept: Inverse temperature conversion. Celsius is Kelvin shifted by an offset. Subtracting returns to the Celsius scale.

Explanation

Concept: Inverse temperature conversion. Celsius is Kelvin shifted by an offset. Subtracting returns to the Celsius scale.

Submit

5. Convert 310 K to °C (approx):

37 °C

310 °C

583 °C

Concept: K to °C. °C ≈ K − 273. 310 − 273 = 37 °C.

Explanation

Concept: K to °C. °C ≈ K − 273. 310 − 273 = 37 °C.

6. 1 MPa equals:

10³ Pa

10⁵ Pa

10⁶ Pa

10⁹ Pa

Concept: Mega- prefix. Mega- is 10⁶, so MPa is a million pascals. This is a common unit for material stresses.

Explanation

Concept: Mega- prefix. Mega- is 10⁶, so MPa is a million pascals. This is a common unit for material stresses.

7. 200 kPa equals 0.2 MPa.

True

False

Concept: Converting kPa to MPa. 1 MPa = 1000 kPa. So 200 kPa ÷ 1000 = 0.2 MPa.

Explanation

Concept: Converting kPa to MPa. 1 MPa = 1000 kPa. So 200 kPa ÷ 1000 = 0.2 MPa.

8. Convert 0.35 MPa to kPa:

0.35 kPa

3.5 kPa

350 kPa

3500 kPa

Concept: MPa to kPa. 1 MPa = 1000 kPa. So 0.35 × 1000 = 350 kPa.

Explanation

Concept: MPa to kPa. 1 MPa = 1000 kPa. So 0.35 × 1000 = 350 kPa.

9. 1 bar is not an SI unit, but it is often used for pressure.

True

False

Concept: Non-SI units in practice. Bar is widely used in engineering and meteorology. SI prefers pascals, but bar is common for convenience.

Explanation

Concept: Non-SI units in practice. Bar is widely used in engineering and meteorology. SI prefers pascals, but bar is common for convenience.

10. Convert 101,000 Pa to kPa (approx):

10.1 kPa

101 kPa

1010 kPa

0.101 kPa

Concept: Pa to kPa. Divide by 1000. 101,000 Pa becomes about 101 kPa.

Explanation

Concept: Pa to kPa. Divide by 1000. 101,000 Pa becomes about 101 kPa.

Submit

12. Convert 5 °C to K (approx):

5 K

268 K

278 K

305 K

Concept: °C to K. Add about 273. 5 + 273 = 278 K.

Explanation

Concept: °C to K. Add about 273. 5 + 273 = 278 K.

13. −10 °C is about 263 K.

True

False

Concept: Negative Celsius conversion. Add 273 to convert: −10 + 273 = 263 K. Negative Celsius is still positive Kelvin.

Explanation

Concept: Negative Celsius conversion. Add 273 to convert: −10 + 273 = 263 K. Negative Celsius is still positive Kelvin.

14. Convert 2.5 bar to Pa (use 1 bar = 100,000 Pa):

25,000 Pa

250,000 Pa

2,500,000 Pa

Concept: Bar to Pascal factor. With 1 bar = 100,000 Pa, multiply by 100,000. 2.5 bar = 250,000 Pa.

Explanation

Concept: Bar to Pascal factor. With 1 bar = 100,000 Pa, multiply by 100,000. 2.5 bar = 250,000 Pa.

15. Kelvin is an SI base unit, while Celsius is derived from Kelvin with an offset.

True

False

Concept: SI temperature unit. Kelvin is the base unit in SI definitions. Celsius is tied to Kelvin by a fixed offset.

Explanation

Concept: SI temperature unit. Kelvin is the base unit in SI definitions. Celsius is tied to Kelvin by a fixed offset.

16. Convert 0.002 MPa to Pa:

2 Pa

200 Pa

2000 Pa

2,000,000 Pa

Concept: MPa to Pa. Multiply by 10⁶. 0.002 × 10⁶ = 2000 Pa.

Explanation

Concept: MPa to Pa. Multiply by 10⁶. 0.002 × 10⁶ = 2000 Pa.

17. To convert kPa to Pa, you ______ by 1000.

Concept: Prefix conversion direction. Moving from kilo- to the base unit increases the number. So you multiply by 1000.

Explanation

Concept: Prefix conversion direction. Moving from kilo- to the base unit increases the number. So you multiply by 1000.

Submit

18. Convert 450 kPa to Pa:

45,000 Pa

4500 Pa

450,000 Pa

4,500,000 Pa

Concept: kPa to Pa. Multiply by 1000. 450 × 1000 = 450,000 Pa.

Explanation

Concept: kPa to Pa. Multiply by 1000. 450 × 1000 = 450,000 Pa.

19. A temperature difference of 20 °C is the same as a difference of 20 K.

True

False

Concept: Temperature differences. Kelvin and Celsius have the same step size. Offsets cancel when you take differences.

Explanation

Concept: Temperature differences. Kelvin and Celsius have the same step size. Offsets cancel when you take differences.

20. Convert 293 K to °C (approx):

20 °C

293 °C

566 °C

Concept: K to °C. Subtract about 273. 293 − 273 = 20 °C.

Explanation

Concept: K to °C. Subtract about 273. 293 − 273 = 20 °C.

Temperature Pressure Conversion Quiz: Test Physics Conversions

1. Kelvin and Celsius temperature steps (size of 1 unit) are:

2.

What first name or nickname would you like us to use?

2. Convert 25 °C to K (approx):

3. 0 °C is approximately 273 K.

4. To convert from Kelvin to Celsius, you ______ about 273.

5. Convert 310 K to °C (approx):

6. 1 MPa equals:

7. 200 kPa equals 0.2 MPa.

8. Convert 0.35 MPa to kPa:

9. 1 bar is not an SI unit, but it is often used for pressure.

10. Convert 101,000 Pa to kPa (approx):

11. 1 kPa equals ______ Pa.

12. Convert 5 °C to K (approx):

13. −10 °C is about 263 K.

14. Convert 2.5 bar to Pa (use 1 bar = 100,000 Pa):

15. Kelvin is an SI base unit, while Celsius is derived from Kelvin with an offset.

16. Convert 0.002 MPa to Pa:

17. To convert kPa to Pa, you ______ by 1000.

18. Convert 450 kPa to Pa:

19. A temperature difference of 20 °C is the same as a difference of 20 K.

20. Convert 293 K to °C (approx):