Steam Systems I: Advantages and Basics of Steam MCQ

Steam can hold nine to ten times as much potential energy as an equivalent mass of water.

• T
• F

What is the heat energy which causes a change of state?

• Dry heat
• Total heat
• Latent heat.
• Pressurized heat

Sensible heat is the energy used to raise the temperature of a substance. In water at atmospheric pressure 4.19 kJ of energy are required to heat 1 kg by 1°C. 1 BTU is required to heat 1 lb by 1°F.

• T.
• F

In comparison to the needed floor space for a modern packaged unit for steam heated water, a packaged unit incorporating a shell and tube heat exchanger would typically cover an area of ____________________ times the floor space.

• Two to three.
• Four to five
• One to two
• None of the above

 
Which of the following is an advantage of using steam?

• Efficient and economic to generate
• Easy to distribute and control
• Highly effective in the transfer of energy to process
• Sterile and intrinsically safe
• All of the above 

Water changes to steam at:

• 0°C 32°F
• 100°C 212°F
• It depends on the pressure.
• It depends on the volume
• It depends on the efficiency of the boiler

 
In order to make steam flow from its generation point to another point at which it will be utilized, there must be a difference in_____________.

• Volume
• Temperature
• Enthalpy
• Pressure.
• None of the above

The temperature above the saturation temperature is called

• Superheated steam
• Degree of superheat of the steam.
• Subsaturated water
• None of the above

 
Compared to steam at saturation temperature, superheated steam:

• Contains more latent heat
• Is at higher temperature, or pressure, or both
• Occupies a larger volume
• All of the above 

When water reaches its saturation point, it begins to change from a liquid to a gas.

• False
• True.