Building Services Engineering 5th Edition Handbook

398 Understanding units
Questions
1. Which of these equals one standard atmosphere at sea level?
1. 1.013 tonne/m 2 .
2. 1 bar.
3. 10 000 N/m 2 .
4. 1013.25 mb.
5. 10 6 N/m 2 .
2. Which of these equals one standard atmosphere at sea level?
1. 1013 tonne/m 2 .
2. 10 5 bar.
3. 10 9 N/m 2 .
4. 14.7 lb/in 2 .
5. 10 6 N/m 2 .
3. Which of these equals one standard atmosphere at sea level?
1. 1 × 10 5 Pa.
2. 1.01325 × 10 5 N/m 2 .
3. 1 × 10 4 N/m 2 .
4. 30 m H 2 O.
5. 1013.25 mm Hg.
4. Which of these equals one standard atmosphere at sea level?
1. 9.807 m H 2 O.
2. 29.35 m H 2 O.
3. 10.3 m H 2 O.
4. 101 325 kJ/m 2 .
5. 1.205 kg/m 2 .
5. Which of these is the acceleration due to gravity, g?
1. 10 m/s 2 .
2. 30 ft/s 2 .
3. 186 000 miles/h.
4. Gravity is static.
5. 9.807 m/s 2 .
6. Which of these describes the acceleration due to gravity, g?
1. Calculated from a1kgweight free falling from a height.
2. Relative to distance from the Moon.
3. Constantly 9.807 m/s 2 .
4. Varies with height above sea level.
5. Inversely proportional to depth below sea level.
7. Which is the specific heat capacity of air?
1. Sensible heat content kJ/kg.
2. Total heat content kJ/kg.
3. 1.205 kJ/kg.
4. 1.012 kJ/kg K.
5. 4.186 kJ/kg K.