Mechanical burners

Question 1

a burner in which the combustion air is supplied by mechanical pressure at sufficient pressure to over come the resistance of the burner is a?

Answer 1

description of a fan assisted burner

Question 2

what type of draft control is used with a fan assisted burner

Answer 2

Barometric damper

Question 3

where are the fans located on a induced draft burner

Answer 3

downstream of the combustion chamber

Question 4

a fan assisted burner has a negitive combustion chamber pressure? T/F

Answer 4

TRUE

Question 5

a forced draft burner has a Positive combustion chamber pressure? T/F

Answer 5

True

Question 6

where are the fans located on a balanced draft burner system

Answer 6

upstream and downstream of the combustion chamber

Question 7

is the combustion chamber pressure in a forced draft burner system positive or negative

Answer 7

Positive

Question 8

which fuels are typically used in a dual fuel burner

Answer 8

Natural gas and Oil

Question 9

Name all 3 types of premix burners

Answer 9

Inspirator,Aspirator and mechanical mixer

Question 10

Inspirator uses air under pressure to entrain gas? T/F

Answer 10

False an inspirator uses gas under pressure to entrain air

Question 11

Aspirator uses air under pressure to entrain gas? T/F

Answer 11

True

Question 12

which type of premix burner typically uses a zero govenor to control the gas pressure

Answer 12

Aspirator

Question 13

premix burners mix the gas and the air before the burner head? T/F

Answer 13

True

Question 14

Nozzel mix burners mix the gas and the air in the burner port? T/F

Answer 14

True

Question 15

what is the most common way to control the proportions of gas and air entering a nozzle mix burner

Answer 15

mechanical linkage

Question 16

what is another name for a bunsen burner

Answer 16

Atmospheric burner

Question 17

bunsen burners and inspiriting burner both use gas flow to draw in air which type of burner would operate at a higher pressure. ( assuming fuel used was the same?)

Answer 17

Inspirating burner

Question 18

what are other names for inspirating mixer.

Answer 18

Air-jet mixer and proportional mixer

Question 19

where is the gas introduced in a mechanical premix burner

Answer 19

at the inlet of the fan or blower

Question 20

what is the greatest concern with mechanical premix burners

Answer 20

Flashback

Question 21

at what percentage of natural gas to air will a flame be at its highest temperature

Answer 21

10%

Question 22

why are nozzle mix burners prefered over premix burners

Answer 22

wide turndown ratio, less flashback and higher flow rate

Question 23

what methods are being used to lower NOx emissions from gas burners

Answer 23

flue gas recirculation, staged air and fuel burner, infered burner and cataltic generators