furnaces

Question 1

Primary / secondary

Answer 1

Primary air is mixed with fuel before ignition, secondary air is drawn into the flame after ignition to complete combustion process

Question 2

Lock out tag out

Answer 2

equipment not safe when turned off may have store energy, needs to be off loaded and locked off. mechanical, chemical, pneumatic, hydraulic, electrical, thermal

Question 3

Furnace section

Answer 3

Radiant section is the hottest and where most heat gets transfered. most vulnerable to oevr heating. Convection to recover heat energy from gases from the radiant section.

Question 4

how do you know a vessel is about to rupture

Answer 4

vibrating banging noises, over pressurization

Question 5

Impingement

Answer 5

occurs by reduced excess air lengthening flames causing them to touch the tubes which would cause damage to the pipes

Question 6

Atomization of liquid fuels

Answer 6

Necessary to increase surface area and efficiency of performance by pressure jet and steam jet methods

Question 7

trail for ignition time

Answer 7

The time allowed to introduce fuel into the combustion chamber without having achieved ignition. too much time/fuel could cause issues