3.8 Boiler Control systems

Question 1 of 9

1

A rapid increase in boiler load causes an immediate increase in steam flow from the boiler, which creates a sudden ____ in the boiler steam drum pressure

Select one of the following:

drop
increase
change
temperature

Explanation

Question 2 of 9

1

In a fuel flow - airflow combustion control system, the fuel flow signal makes the final adjustment to the ________

Select one of the following:

feedwater
fuel
airflow
drum level

Explanation

Question 3 of 9

1

In a fuel flow - airflow combustion control system, the fuel and airflows are measured directly and are converted to ________ signals by means of square root extractors

Select one of the following:

digital
parallel
proportional
output

Explanation

Question 4 of 9

1

By measuring and comparing the steam and the _____, it is possible to obtain efficient combustion in a boiler by maintaining a proper steam to airflow ratio

Select one of the following:

feedwater
fuel
airflow
drum level

Explanation

Question 5 of 9

1

With On - Off boiler feed water control, water is supplied ______ to the boiler, either by fully opening or fully closing a valve in the feedwater line.

Select one of the following:

partially
intermittenly
fully
steadily

Explanation

Question 6 of 9

1

A sudden increase in load, a decrease in drum pressure, and an immediate increase in heat release is called ________

Select one of the following:

rate
swell
shrinkage
condensing

Explanation

Question 7 of 9

1

Gas bypass method involves the seperation of the convection section of the boiler into two, or more, ______ gas passes

Select one of the following:

reverse
crossing
parallel
counter

Explanation

Question 8 of 9

1

The furnace pressure controller will adjust the boiler ____ dampers to keep the pressure constant at all boiler loads

Select one of the following:

outlet
inlet
air
burner

Explanation

Question 9 of 9

1

An oxygen analyzer can also be provided to indicate the excess oxygen in the flue gas, assisting the operator to control the excess air and increasing boiler _________

Select one of the following:

load
firing
temperature
efficiency

	Created by TRAVIS CANNING over 8 years ago

Quiz on 3.8 Boiler Control systems, created by TRAVIS CANNING on 27/01/2016.

3.8 Boiler Control systems

Question 1 of 9

A rapid increase in boiler load causes an immediate increase in steam flow from the boiler, which creates a sudden ____ in the boiler steam drum pressure

Select one of the following:

Explanation

Question 2 of 9

In a fuel flow - airflow combustion control system, the fuel flow signal makes the final adjustment to the ________

Select one of the following:

Explanation

Question 3 of 9

In a fuel flow - airflow combustion control system, the fuel and airflows are measured directly and are converted to ________ signals by means of square root extractors

Select one of the following:

Explanation

Question 4 of 9

By measuring and comparing the steam and the _____, it is possible to obtain efficient combustion in a boiler by maintaining a proper steam to airflow ratio

Select one of the following:

Explanation

Question 5 of 9

With On - Off boiler feed water control, water is supplied ______ to the boiler, either by fully opening or fully closing a valve in the feedwater line.

Select one of the following:

Explanation

Question 6 of 9

A sudden increase in load, a decrease in drum pressure, and an immediate increase in heat release is called ________

Select one of the following:

Explanation

Question 7 of 9

Gas bypass method involves the seperation of the convection section of the boiler into two, or more, ______ gas passes

Select one of the following:

Explanation

Question 8 of 9

The furnace pressure controller will adjust the boiler ____ dampers to keep the pressure constant at all boiler loads

Select one of the following:

Explanation

Question 9 of 9

An oxygen analyzer can also be provided to indicate the excess oxygen in the flue gas, assisting the operator to control the excess air and increasing boiler _________

Select one of the following:

Explanation