HAC vocabulary quiz 20

What is the standard air density at 70 oF and at sea level pressure?

• 0.125 pounds per cubic foot

• 0.100 pounds per cubic foot

• 0.050 pounds per cubic foot

• 0.075 pounds per cubic foot

In how many states can substances exist?

• Three

• Two

• Four

• Five

What is the normal force per unit area at a small hole in the wall of a duct called?

• Stagnation Pressure

• Static Pressure

• Total Pressure

• Dynamic Pressure

What is a means by which static pressures of a duct system may be read directly?

• Dynamic Tap

• Static Tap

• Total Tap

• Stagnation Tap

What is sub cooling of a liquid at a constant pressure?

• Boiling of the liquid

• Freezing of the liquid

• Heating of the liquid

• Cooling of the liquid