Question 1

The average person can detect temperature changes in as little as:&#10;A)10-15 &#176; F&#10;B)3-5 &#176; F&#10;C)1-2 &#176; F&#10;D)5-8 &#176; F

Accepted Answer

B

Question 2

A trap is a device, usually thermostatic or float and thermostatic, that promotes the discharge of steam from a heating unit.

Accepted Answer

A trap is a device that promotes the discharge of condensate and non-condensable gases from a steam system, not steam itself.

Question 3

The additional heat to convert water to steam is known as:&#10;A)boiling point&#10;B)dew point&#10;C)latent heat of vaporization&#10;D)forward-pressure heat

Accepted Answer

The additional heat required to convert water to steam, without changing its temperature, is known as the latent heat of vaporization. This energy is needed to overcome the forces of attraction between the water molecules during the phase change from liquid to gas.

Question 4

Which of the following boiler types creates hot water to be used externally to itself?&#10;A)electric boiler&#10;B)high pressure, high temperature boiler&#10;C)power boiler&#10;D)hot water supply boiler

Accepted Answer

Hot water supply boilers are specifically designed to create hot water that is intended for external use, such as for domestic or commercial heating and hot water supply purposes.

Question 5

A Hartford loop is a piping arrangement at the boiler designed to equalize pressure between the boiler supply and return.

Accepted Answer

The Hartford loop is a specific piping configuration used in steam heating systems to prevent water from being siphoned out of the boiler, thus maintaining equal pressure between the supply and return lines.

Question 6

Building structures and contents are usually maintained between what narrow relative humidity range?&#10;A)50-80%&#10;B)30-50%&#10;C)40-60%&#10;D)20-40%

Accepted Answer

The ideal relative humidity range for maintaining building structures and contents is typically between 40-60%. This range helps in preventing the growth of mold, reducing the risk of structural damage, and maintaining a comfortable environment.

Question 7

The latent heat or heat of vaporization is generally how many BTU at low pressure?&#10;A)980&#10;B)960&#10;C)940&#10;D)920

Accepted Answer

The answer of The latent heat or heat of vaporization...

Question 8

Which of the following is a piping system designed to equalize pressure between the boiler supply and return:&#10;A)header&#10;B)Hartford loop&#10;C)dry return&#10;D)wet return

Accepted Answer

The Hartford loop is a piping arrangement designed to equalize pressure between the boiler supply and return, adding a measure of safety and preventing water from being siphoned away from the boiler in certain systems, particularly steam heating systems.

Question 9

Two-pipe systems are typically the least likely to be used for building heating.

Accepted Answer

Two-pipe systems are commonly used in building heating because they are efficient and can provide both heating and cooling by simply changing the temperature of the water circulating through the system.

Question 10

What type of trap closes based on the venturi effect of steam rushing past a disk through an opening of reduced size?&#10;A)inverted bucket trap&#10;B)float trap&#10;C)thermodynamic trap&#10;D)wet return

Accepted Answer

The thermodynamic trap operates based on the venturi effect, where steam rushing past a disk through an opening of reduced size creates a pressure difference that causes the trap to close.

Question 11

Building structures and contents are usually maintained between what narrow temperature range?&#10;A)65-90 &#176; F&#10;B)80-90 &#176; F&#10;C)50-80 &#176; F&#10;D)60-80 &#176; F

Accepted Answer

The answer of Building structures and contents are usually maintained...

Question 12

How much does liquid expand when it turns to gas?&#10;A)1,700 times original volume&#10;B)1,200 times original volume&#10;C)1,500 times original volume&#10;D)1,300 times original volume

Accepted Answer

The answer of How much does liquid expand when it...

Question 13

Which of the following is the liquid resulting from steam giving up its latent heat and cooling back into liquid:&#10;A)condensate&#10;B)drip&#10;C)riser supply&#10;D)water vapor

Accepted Answer

The answer of Which of the following is the liquid...

Question 14

Which of the following is an example of a terminal unit?&#10;A)convector&#10;B)air vent&#10;C)float&#10;D)seat

Accepted Answer

The answer of Which of the following is an example...

Question 15

Which of the following is NOT a method of condensate return in a two-pipe system?&#10;A)gravity return&#10;B)mechanical return&#10;C)vacuum return&#10;D)pressure return

Accepted Answer

The answer of Which of the following is NOT a...

Deck 8: Steam Heating