ME 433 - Q1E - P1

The boiling point of CO at atmospheric pressure is:

• -110°F
• +110°F
• -28°C
• -28°C

The boiling point of NH3 at atmospheric pressure is:

• +28°C
• +28°F
• -28°C
• -28°F

Which of the following would you apply if a person got Freon in his eyes?

• clean water
• soapy water
• sodium bicarbonate
• sterile mineral oil

A double-seated valve allows the valve to be:

• packed only in the closed position
• packed in the wide open or closed position
• operated as a suction or discharge valve
• removed for replacement without shutting down

The amount of CO₂ or Freon in a cylinder is measured by:

• pressure
• weight
• volume
• psi

The latent heat of fusion of ice is:

• 500 Btu
• 188 Btu
• 144 Btu
• 970 Btu

Latent heat:

• can be measured with a pyrometer
• cannot be measured with a thermometer
• changes as the refrigerant cools
• can be measured with a thermometer

Absolute zero is:

• 144° below zero on the fahrenheit scale
• The same as zero on the fahrenheit scale
• 970° below zero on the fahrenheit scale
• 460° below zero on the fahrenheit scale

A ton of refrigeration is equal to the cooling effect of:

• 2,000 lbs. of ice melting in 24 hrs
• 2,000 lbs. of water being converted to ice
• 2,000 lbs. of ice melting in 12 hrs
• 2,240 lbs. of ice melting in 24 hrs

What is another name of discharge pressure?

• Absolute pressure
• Head pressure
• Suction pressure
• Condenser pressure