Boiler Final EXAM NEWEST ACTUAL EXAM 100 QUESTIONS AND CORRECT
DETAILED ANSWERS FROM EXPERT
The variable compassionately pressure at amazing fuel oil
... [Show More] burner functions to - Provide a
wide range of combustion
The process of breaking up fuel oil into fine particles to ensure good combustion is called -
Atomization
The primary purpose of the sprayer play in the mechanica atomizing Oil burner is to -
Produce a fine uniform fuel must
What is indicated by the code number 30 2Y20 stamped on the burner sprayer plate -
Sprayer play orifice was made with the size 32 drill
Which atomizing sprayer play has the largest capacity -2909
The last two digits stamped on a fuel oil atomizer sprayer play represents the crosssectional area ratios of the tangential slots and orifice. The ratio determines the - Angle of
the cone
If the theoretical quantity of the dry air required to burn 1 pound of fuel oil is 13.75 pounds
what weight of air will be necessary to burn 1 pound of fuel to operate a boiler at 10% excess
air - 15.13 pounds
Excess air must be provided to an operating boiler to allow for - Complete combustion of
fuel
Fuel oil atomizers are used in boilers to - Break fuel oil into a fine spray
Assuming all burners are clean in the fuel oil is at a correct temperature. It is considered
good practice to adjust the excess air until a light brown haze is obtained. With the aid of a
chemical-based fuel gas analyzer The percentage readings should indicate - No CO2 low 02
and high CO2
If an analysis of a boiler fuel gas determines there is 100% axis air for combustion you
should expect the fuel gas to have a nitrogen content of approximately - 79.0%
Generally a 12% to 14% content of carbon dioxide and boiler fuel gas is indicates - Proper
combustion of the fuel oil
When firing a boiler and local manual control and increasing boiler load must be
accompanied by - Increase in the first draft air pressure before an increase in the fuel oil
flow
In and automatically fired boiler the steam pressure regulator controls the supplier fuel oil
to the burners by responding to variations in the - Steam header pressure
A flame scanner installed in modern boiler combustion control systems functions to - Cut off
the fuel supply with the fire goes out
When increasing the firing rate of a boiler which of the following should be carried out first -
Increase the first draft air pressure
Boiler fuel oil atomizer parts should be clean by soaking in kerosene or diesel fuel and -
Scraped with a non-abrasive tool
In and oil fired water tube boiler inner case and Air leaks can cause - Chilling of the
combustion gases
If a boiler fire is blown out by a flare back you should immediately - Secure the fuel supply to
the boiler burners
If the fires in the boiler furnace began sputtering or hissing you should suspect - Water
contamination of the fuel
If the fire start sputtering while steaming understudy conditions which are the actions listed
should be taken - Shift suction to another settling tank [Show Less]