Module 2 Section 2 Oil Furnaces

Question 1

List 5 problems with oil storage tanks

Answer 1

poor location, leakage, rusting, underground, empty

Question 2

What is the implication of an abandoned buried oil tank?

Answer 2

Implications include fuel leakage, which is an environmental issue. Significant cost to clean up soil & remove tank. Issue removing tank b/c it will eventually collapse. In some areas the tank is allowed to be filled with sand or a concrete slurry.

Question 3

The oil vent pipe allows:
a. oil vapors to vent out of the tank on a hot day
b. air to escape from the tank when tank is filled
c. an overflow condition to dump oil back outside
d. oil supplier a second pipe to fill the tank through

Answer 3

air to escape from the tank when tank is filled

Question 4

List 4 problems with oil tank fill & vent pipes.

Answer 4

leaks, missing caps, abandoned, corroded

Question 5

List 4 problems with oil supply lines

Answer 5

leak, corrosion, mechanical damage, unprotected, undersized

Question 6

Explain why an exterior, above-ground oil storage tank needs a 2 inch oil supply line, rather than the typical 3/8 inch diameter line.

Answer 6

larger pipe allows oil to flow through the line when temperature is very low. Oil becomes very viscous at low temps.

Question 7

List 3 problems with oil filters

Answer 7

Leak, dirty, missing

Question 8

Natural gas burners on conventional furnaces are natural draft. Oil burners in conventional oil furnaces are ___ draft.

Answer 8

Forced

Question 9

Since oil is a liquid we have to ___ it before we can ignite it.

Answer 9

Atomize

Question 10

List 6 common problems with oil burners.

Answer 10

dirty, inoperative, leaking, incomplete combustion, vibrating/noisy, too close to combustibles

Question 11

What is the typical required combustible clearance between an oil burner & combustibles?

Answer 11

24 inches

Question 12

What is the purpose of the refractory in an oil furnace?

Answer 12

protects the steel of the furnace from the high temperature flame

Question 13

List 3 materials that have been used for refractories

Answer 13

fire brick, stainless steel, ceramic felts

Question 14

What is the purpose of the primary controller in an oil furnace?
a. cycles the house air blower
b. cycles burner
c. prevents oil accumulation in the combustion chamber

Answer 14

prevents oil accumulation in the combustion chamber

Question 15

List 3 common problems with the primary controller on a conventional oil furnace

Answer 15

missing, inoperative, tripped

Question 16

What is the purpose of the barometric damper?

Answer 16

ensures adequate draft air supply for the chimney

Question 17

How do we prevent combustion gases leaking out the barometric damper?

Answer 17

damper can only swing one way, so the forced draft burner pressure can close the damper, but not swing it past the vertical position, which would allow flue gases into house.

Question 18

List 5 common barometric damper problems.

Answer 18

rusting, inoperative, missing, misadjusted, inadequate draft air, spillage, improper location

Question 19

Every oil furnace must have a barometric damper. T/F

Answer 19

False

Question 20

Since oil combustion gases re hotter than natural gas combustion gases, you will rarely find __ used as an exhaust vent material.

Answer 20

aluminum

Question 21

List 6 problems with oil furnace vent connectors

Answer 21

rusting, poor slope, too long, clearance to combustibles, loose connections, undersized

Question 22

What is the minimum required clearance to combustibles for a single-wall exhaust flue serving an oil furnace?
a. 1 inch
b. 2 inches
c. 6 inches
d. 18 inches

Answer 22

18 inches

Question 23

The vent connector from an oil furnace must connect to the chimney above a vent connector from a water heater. T/F

Answer 23

False