Deck 32: Oil Heat

Question 1

The cad cell relay is a safety device that uses which of the following to prove ignition ?

A) Heat in the flue.
B) Heat in the combustion chamber.
C) Light in the combustion chamber.
D) Heat in the blast tube.

Answer 1

C

Question 2

If a technician inspects the interior of a combustion chamber and finds large quantities of unburned oil, he would correctly conclude that the ____ .

A) nozzle may be too small
B) stack switch or cad cell may be defective
C) primary control unit may be defective
D) Both b and c are correct.

Answer 2

D

Question 3

To make combustion efficiency tests, a hole must be made ____.

A) in the flue pipe after the draft control
B) in the flue pipe before the draft control
C) over the fire at the observation door
D) under the draft hood

Answer 3

B

Question 4

Tank piping should be inspected regularly for imperfections and leaks.

Question 5

An auxiliary tank and booster pump system is required if the oil supply is situated ____ below the oil burner pump .

A) any distance
B) 5 feet or more
C) 10 feet or more
D) 15 feet or more

Question 6

The grade of fuel used in residential and light commercial units is ____.

A) Number 1
B) Number 2
C) Number 4
D) Number 6

Question 7

Tanks that are to be installed underground must be protected against corrosion.

Question 8

Nozzles can be cleaned to remove any carbonization by using a very fine wire brush.

Question 9

Improper combustion can lead to ____.

A) excessive carbon monoxide production
B) smoke condition around furnace
C) wasted fuel oil
D) All of the above.

Question 10

The heat content of one gallon of No. 2 fuel oil is about ____________________ Btu.

Question 11

In a(n) ____________________ fuel oil supply system, one pipe is the supply and the other acts as the return .

Question 12

In a single-stage fuel oil pump, the oil is fed to the burner by capillary action.

Question 13

A condensing oil furnace operates at a higher efficiency because part of the heat output is ____.

A) sensible heat
B) latent heat
C) superheat
D) sub-cooling

Question 14

When nozzles problems are apparent, the nozzle should be removed using ____ and replaced .

A) a special nozzle wrench
B) adjustable pliers
C) a pipe wrench
D) Both a and b.

Question 15

____________________ is the amount of carbon left in a sample of oil after it is changed from a liquid to a vapor by being boiled in an oxygen-free atmosphere .

Question 16

When any product containing hydrogen and/or carbon reacts with oxygen to release heat energy, the process is called ____________________.

Question 17

The stack switch or stack relay ____.

A) starts the fan motor when the thermostat calls for heat
B) shuts down the burner if it does not sense heat in the stack
C) cuts off the ignition after the flame has been established
D) All of the above.

Question 18

Oil burner nozzles are rated at 100 psig nozzle pressure .

Question 19

Oil tanks should be checked for water at least once a month .

Question 20

When the oil tank is above the oil burner pump, the fuel oil supply system would normally be a ____.

A) gravity flow, one-pipe system
B) single-stage pump, two-pipe system
C) two-stage pump, one-pipe system
D) two-stage pump, two-pipe system

Question 22

There are two main types of oil pumps used on gun-type burners, single-stage and ____________________ pumps .

Question 23

How can a technician tell the difference between an upflow furnace and a downflow furnace?

Question 24

Carbon monoxide is a(n) ____________________ and odorless gas .

Question 25

The portion of a nozzle assembly that produces rotation of the oil spray is called the ____________________  .

Question 26

Fill and ____________________ pipes should be pitched toward the tank opening to prevent the formation of oil traps .

Question 27

What tests can a technician perform on an oil furnace that will check the combustion efficiency?

Question 28

Fuel pumps are equipped with ____________________ at the inlet to prevent particulate matter from entering the pump.

Question 29

Oil lines are typically made of copper and should be sized at a minimum ____________________ OD .

Question 30

Name six parts of an oil burner nozzle .

Question 31

The ____________________ is an oil piping component that allows a one-pipe system to function as a two-pipe system .

Question 32

If an oil burner equipped with the cad cell relay ignites, runs for about ninety seconds, and cuts off. What is the first thing the service technician should do ?

Question 33

Define atomization.

Question 34

Modern oil burners are referred as high pressure burners, as the oil is delivered through the burner at a pressure of minimum ____________________ psi .

Question 35

The process of breaking up a liquid into fine droplets is called ____________________ .