060203c Bpiler Trim

Question 1

Each automatically fired hydronic boiler shall have this control, that will cut off the fuel supply to prevent the fluid temperature from exceeding the max allowable from the boiler outlet ( 121c) 250f

Answer 1

Limit control

Question 2

Boilers should have a control that will cut the fuel supply off when temperature reaches an operating limit. Should be less than the maximum allowable temperature

Answer 2

Operating controls

Question 3

The installation of these gushes are essential in detaining the pressure drop over the system and the flow characteristics of the system

Answer 3

Pressure gauges

Question 4

Code states that each hot water boiler must have this device, must be located at or near the outlet. To indicate the temperature at any moment

Answer 4

Thermometer

Question 5

This guage indicates pressure, feet of head, and temperature

Answer 5

Tridicator

Question 6

These valves are installed on some systems to prevent gravity circulation from occurring within the pipe system

Answer 6

Flow control valves

Question 7

Some boilers such as cast iron sectionals can be fitted with this fitting. Separates gases from the water leaving boiler

Answer 7

Boiler fittings

Question 8

This device removes air and gases in the heating system located in the supply pipe leaving boiler

Answer 8

Air or line scoops

Question 9

Similar to line scoop these devices are fitted with fine screens to which air bubbles adhere and travel upwards to the float controlled air valve

Answer 9

Micro bubble resorbers

Question 10

These devices allow air to be vented from the system at any point of accumulation, must be located on the highest points of the system

Answer 10

Auto air vents

Question 11

This type of tank has no bladder or diaphragm, tank contains air and when expansion of water enters tank it compressss the air. External site glass on the tank

Answer 11

Cushion tanks

Question 12

This tank contains a butyl bladder bladder separates the expanded water from the air and does not come in contact with the tank

Answer 12

Bladder tanks

Question 13

Pumps that are generally 1/2 hp or less and operate below 12’ of head pressure

Answer 13

Low head pumps

Question 14

These pumps generally are above 1/2 hp motors and operate above 12 ft of head pressure

Answer 14

High head pumps

Question 15

Type of boiler circulating pump is used to adjust the flow or pressure to the changing demands of the hydronic system

Answer 15

Variable frequency drives

Question 16

Each automatically fired hydronic heating boiler with heat input greater than 400,000 brus must have this device

Answer 16

Low water cut off

Question 17

Boilers over 400 000 btu/hr must have this switch

Answer 17

Flow switch

Question 18

These boilers operate on pressure not how water boilers temperature operation

Answer 18

Steam boilers

Question 19

Low pressure steam boilers operate what pressure

Answer 19

Up to 15 psig

Question 20

High pressure steam boilers operate what pressure s

Answer 20

Over 15 psig

Question 21

This part of the trim is required in a steam boiler allowing you to see the level of water inside boiler

Answer 21

Sight glasses