Heating 2Nd Year Ilm Review Part 2

Front 1

What is the primary purpose of a heating system?

Back 1

Comfort for individual in the space

Front 2

Heat travels in what direction?

Back 2

From warm objects to cooler

Front 3

What is not considered when calculating heat loss ?

Back 3

Interior walls of the building

Front 4

ODT stands for?

Back 4

Outside design temperature

Front 5

To what does the designed temperature difference refer to?

Back 5

Indoor temp -outdoor temp

Front 6

What is the recommended practice for determining room dimensions?

Back 6

Measurements to be rounded up or down to the nearest 0.025 of a Foot

Front 7

Which type of heat loss results in cool air from the outside drawn in through cracks around windows and doors?

Back 7

Infiltration losses

Front 8

Which type of heat loss transfers through the ceiling?

Back 8

Transmission losses

Front 9

What must be known to properly size a boiler?

Back 9

Total net heat loss of the space being heated.

Front 10

What causes frequent cycling of a boiler ?

Back 10

A boiler with an output too high for the application

Front 11

Whose procedure should be followed to ensure proper boiler start up?

Back 11

Manufacturers

Front 12

What is the safest way to check for gas leaks prior to firing the boiler ?

Back 12

Soapy Water

Front 13

Flow rate, temperature drop, and pressure drop are used to size what?

Back 13

Size of piping

Front 14

What must be known to properly size the out out of a pump for a hydronic heating system?

Back 14

Required GPM and total feet of head

Front 15

What is the main function of an expansion handling device?

Back 15

To allow water in the system to expand and contract as the system water heats and cools

Front 16

How do diaphragm tanks differ from standard closed expansion tanks?

Back 16

Diaphragm tanks have a bladder that separates the water and air

Front 17

In which section of the heating code will you find definitions?

Back 17

Section 3

Front 18

Quality of work is referenced in which section of the heating code?

Back 18

Section 4

Front 19

Which section in the heating code deals with hydronic space heating?

Back 19

Section 13

Front 20

What is covered in section 15 of the heating code?

Back 20

Auxiliary systems

Front 21

What must be selected prior to installation of rough in piping?

Back 21

Heat transfer units

Front 22

When you calculate heat through a concrete wall you use:

Back 22

K value

Front 23

When you compare resistance to heat loss of various insulation materials you use:

Back 23

R value

Front 24

I/R=

Back 24

U value

Front 25

To calculate the R value of a wall you would _______ the R values of each material.

Back 25

Add

Front 26

The amount of Heat lost in one hour through a 200 square foot wall with an R 50 rating and 100•F temp difference between outside and inside air would be?

Back 26

1) 1/50=0.02

2) 200 X0.02X100= 400BTU

Front 27

A heat loss calculation is important to determine:

Back 27

The output needed by a heating appliance to counteract building heat loss

Front 28

When calculating heat loss through a wall built of a single material, the factor used use:

Back 28

K value

Front 29

R value is used to:

Back 29

Show the resistance of various insulated materials to heat lost through them.

Front 30

What are the 2 most common ways to accommodate Thermal movement ?

Back 30

1-off set and expansion loops or bends

2-mechanical expansion joints( bellows and slip type expansion joints)

Front 31

List the 4 common ways to accommodate thermal movement ?

Back 31

Pipe loops

Offsets

Expansion coil

Changes of direction

Front 32

Pipe installations can be either __________ or _________, meaning that one system can have anchors , guides and expansion joints while to the other system will not.

Back 32

Free floating or restrained

Front 33

Each change of direction in a pipeline offers some _________ that allows for some expansion.

Back 33

Piping flexibility

Front 34

Pipe loops and offsets are an ideal way to allow expansion ; however, you should be cautious when the line connects to _____________ and _________

Back 34

Boilers , header branches and wall fins

Front 35

What must be considered when using slip Joint expansion devices?

Back 35

slip joint must be installed in an accessible location so they can be serviced

Front 36

What is the common rule to use when designing a non problematic heating pipeline ?

Back 36

Keep is as simple as possible.

Front 37

As a rule, the first pipe guide should be placed ________ from the expansion joint and the second one should be _______ from the expansion joint .

Back 37

4 pipe diameters

14 pipe diameters

Front 38

What is the most trouble free expansion joint?

Back 38

The non mechanical expansion loop or offset is most trouble free tho in some installations it may be restricted due to space limitations

Front 39

What is Axial movement

Back 39

Travel through the center line of the expansion device .

Front 40

What is a lateral offset?

Back 40

When the expansion joint acts as an offset device, with the faces of the fitting staying square to each other .

Front 41

If a considerable amount of joint lateral movement and offset is needed , a/an ___________ is the better device to use.

Back 41

Flexible connector