Deck 8: Steam Heating

Question 1

The average person can detect temperature changes in as little as:

A)10-15 ° F
B)3-5 ° F
C)1-2 ° F
D)5-8 ° F

Answer 1

B

Question 2

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

Answer 2

False

Question 3

The additional heat to convert water to steam is known as:

A)boiling point
B)dew point
C)latent heat of vaporization
D)forward-pressure heat

Answer 3

C

Question 4

Which of the following boiler types creates hot water to be used externally to itself?

A)electric boiler
B)high pressure, high temperature boiler
C)power boiler
D)hot water supply boiler

Question 5

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

Question 6

Building structures and contents are usually maintained between what narrow relative humidity range?

A)50-80%
B)30-50%
C)40-60%
D)20-40%

Question 7

The latent heat or heat of vaporization is generally how many BTU at low pressure?

A)980
B)960
C)940
D)920

Question 8

Which of the following is a piping system designed to equalize pressure between the boiler supply and return:

A)header
B)Hartford loop
C)dry return
D)wet return

Question 9

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

Question 10

What type of trap closes based on the venturi effect of steam rushing past a disk through an opening of reduced size?

A)inverted bucket trap
B)float trap
C)thermodynamic trap
D)wet return

Question 11

Building structures and contents are usually maintained between what narrow temperature range?

A)65-90 ° F
B)80-90 ° F
C)50-80 ° F
D)60-80 ° F

Question 12

How much does liquid expand when it turns to gas?

A)1,700 times original volume
B)1,200 times original volume
C)1,500 times original volume
D)1,300 times original volume

Question 13

Which of the following is the liquid resulting from steam giving up its latent heat and cooling back into liquid:

A)condensate
B)drip
C)riser supply
D)water vapor

Question 14

Which of the following is an example of a terminal unit?

A)convector
B)air vent
C)float
D)seat

Question 15

Which of the following is NOT a method of condensate return in a two-pipe system?

A)gravity return
B)mechanical return
C)vacuum return
D)pressure return