B1-6 Steam And Water Heating Systems

Front 1

Define a Window type radiator

Back 1

Radiators for installation where height is limited such as under windows

Front 2

Define a Wall-hung radiator

Back 2

Radiator which is hung on the wall of the room

Front 3

Define a Floor type radiator

Back 3

Radiator equipped with legs which stand on the floor

Front 4

The device which allows condensate to drain from a steam heater but stops the steam from escaping is called a:

Back 4

Radiator Trap

Front 5

If a heating system condensate reciever is vented to atmosphere, the pressure in the condesate return piping will be:

Back 5

Atmospheric Pressure

Front 6

List three methods that may be used to improve condensate returns in building complexes covering large areas, such as shopping centers.

Back 6

1.Vaccum pumps
2.Higher steam pressures in steam suppy lines
3.Heat exchange equiptment to force the condensate through its piping

Front 7

List the two functions of a vaccum pump

Back 7

1.It creates and maintains a vaccum in the retun piping to assist in condensate return
2.It returns condensate to the boiler

Front 8

LIst three requirements of a steam heating piping arrangement in order to ensure adequate flow through the system. The piping must be arranged to:

Back 8

1.Allow steam to flow freely and in sufficent quanities to all heating units
2.The condensate to be removed freely from the units and returned to the boiler
3.The air can be expelled from the heating units and piping

Front 9

In a two pipe variable vaccum system the steam temp can be controlled between ____ and ____. The vaccum in the return system should be _____ to _____ below the vaccum in the steam suppy

Back 9

1.55-105 degrees C
2.85-101.3 kPa

Front 10

What two parties would normally inspect a new heating system before it is put into service

Back 10

1.The heating contracter
2.Provincial Inspector

Front 11

What two items cause the most problems with radiators and convectors

Back 11

1.Valves
2.Traps

Front 12

A hot water heating system is also called a:

Back 12

Hydronic heating system

Front 13

A hot water heating system boiler, piping and heating units are completely filled with water except for:

Back 13

Some air space in a conventional expansion tank

Front 14

List the disadvantages of using a pump for circulating water in a forced circulation heating system

Back 14

1.Noise of operation
2.Increased power costs
3.Increased maintenance

Front 15

The temp of the hot water used in radiant heating systems should be limited to below ___ for ceilings and _____ for floors

Back 15

1.46 degrees C
2.30 degrees C

Front 16

State what fluid is normally using in snow melting systems using liquid filled radiant heat panels.

Back 16

Ethylene Gylcol (Antifreeze)

Front 17

Give two reasons for using Nitrogen instead of air to charge an expansion tank for large heating systems

Back 17

1.Nitrogen is less soluble in water
2.Nitrogen does not cause corrosion

Front 18

In any hot water heating system the pressure at the suction of the circulator must be kept above the pump's:

Back 18

Net Positive Suction Head

Front 19

List three types of heat sources or heat exchangers used in forced warm air heating systems

Back 19

1.Directly fired
2.Electric resistance coils
3.Fin-coil heat exchanger

Front 20

The resistance coil type forced air heating systems uses electric coils which are usually supplied by:

Back 20

240 Volts

Front 21

A typical warm air furnace has a thermal efficiency of

Back 21

80-96%

Front 22

The acronym AFUE stands for:

Back 22

Annual Fuel Utilization Efficency

Front 23

List four improvements that have been made to forced air heating system furnaces in order to increase efficiency

Back 23

1.Installing a vent damper
2.Electronic ignition
3.Improved heat exchanger design
4.Addition of a secondary or terciary heat exchanger

Front 24

In a pulse burner, the pulse combustion occurs at about:

Back 24

60-70 times per second

Front 25

Gas fired warm air furnaces commonly use:

Back 25

Atmospheric gas burners

Front 26

Name two methods of connecting the drive motor for a warm air furnace to the blower

Back 26

1.Metal clutches mounted on the motor shaft
2.A V-belt connection between pullys on the motor shaft and blower shaft

Front 27

Two types of furnace filters use in warm air systems are:

Back 27

1.Mechanical
2.Electronic

Front 28

After leaving the heat exchanger, the warm air is discharged through the _______ to the duct system which distributes the air to the building

Back 28

Plenium

Front 29

List three reasons that ventilation is important for comfortable living conditions

Back 29

1.Remove the stale air containing, odours, smoke, etc
2.To supply fresh clean air into occupied spaces
3.Needed to prevent condensation onn walls and windows

Front 30

List two requirements of a ventilation system

Back 30

1.The air is evenly spead over the whole area
2.The air does not directly strike the occupants

Front 31

The size of airborn contaminants is measured in

Back 31

Microns

Front 32

The best filters available for ventilation system lint removeal are:

Back 32

Dry Mechanical Air Filters

Front 33

State the advantages of bag type filters and multi-wedge filters when compared to flat dry filters used in ventilation

Back 33

1.Very large filtering area
2.Large dirt holding capacity
3.Longer service life then pad type filters

Front 34

True or False: Reusable filters are produced in dry type but are not available as viscous filters

Back 34

False

Front 35

List two types of electronic filters used in ventilation systems

Back 35

1.Electrostatic precipitation
2.Charged-media electronic air cleaners

Front 36

The most common material used for electirc heating elements is:

Back 36

Nickel-chromium resistance wire