Low Pressure Steam Boilers 2nd Yr

Question 0

Which firetube boiler is built with a firebox that is not completely surrounded by water?

Answer 0

Firebox boiler

Question 1

A boiler rated for hot water service at 120 psig (827kpa) and 240F (116C) maximum would be constructed under the rules of which code?

Answer 1

ASME section IV

Question 2

Which boiler consist of an arrangement of drums and headers interconnected by tubes?

Answer 2

Watertube

Question 3

How many fans are used to control the draft through a balanced draft boiler ?

Answer 3

2: one on the inlet and one on the outlet

Question 4

Which boiler would be classified as a firebox boiler

Answer 4

HRT

Question 5

What is the minimum clearance required in front of a access panel on a gas-fired boiler?

Answer 5

24” regardless of whether it is insulated or not

Question 6

What does the installer have to do with the boiler and piping system before turning them over to the owner?

Answer 6

Inspect and test for leak tight service

Question 7

What is the cause of the most common problems encountered after start-up of steam boilers and systems?

Answer 7

Improper cleaning and flushing

Question 8

What is likely to occur if there is a heavy concentration of dissolved or suspended particles in the boiler water?

Answer 8

The water may foam and could cause foaming

Question 9

What should be done if the water in the sight glass is not clear after cleaning and flushing?

Answer 9

Repeat the cleaning procedure

Question 10

What should be done with the results of all pertinent test results during the test , start and balance phases of a system start-up?

Answer 10

Record the results and have the results verified

Question 11

Where is the appliance’s gross rating ?

Answer 11

Boiler nozzle outlet

Question 12

Where is the appliances’s net rating taken

Answer 12

Heat emissions units

Question 13

What does the term pass in the boiler mean ?

Answer 13

The number of times the products of the combustion travel the length of the boiler

Question 14

What is the main advantage of steam over hydronic systems?

Answer 14

Speed of transmission

Question 15

What is the usual maximum circulating speed of water for a low temperature hot water heating system?

Answer 15

4ft/sec

Question 16

What does load tracking refer to when discussing boilers

Answer 16

That ability of a boiler to respond to changes in steam or hot water demand

Question 17

Which boiler has the ability to respond to sudden demands for large volumes of steam for a short period of time ?

Answer 17

Firetube

Question 18

Which boiler has the ability to handle wide variations in load over a long period of time ?

Answer 18

Watertube

Question 19

Why is clean condensate considered to be ideal for feeding back into boiler ?

Answer 19

Condensate is essentially distilled water so it contains no dissolved solids n

Question 20

How often should a pop test be done on a safety valve house on an Lo steam heating boiler?

Answer 20

Annually

Question 21

What is the suggested method of determining whether water is flowing through a water feeder valve?

Answer 21

Listen with stethoscope

Question 22

What is the most probable cause of the water level in a gauge glass fluctuating rapidly ,?

Answer 22

Foaming or priming inside the boiler