Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

OIL HEAT > Oil Heat Finals > Flashcards

Oil Heat Finals Flashcards

1
Q

How is the limit wired on a CAD cell control?

A

In series

This refers to the configuration of electrical components in a circuit.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

When using the Bacharach smoke spot tester, how many times should you pump the tester?

A

10 times

The number of times to pump ensures accurate measurement of smoke density.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is a good overfire draft measurement?

A
  • 0.02 “ w.c.

This indicates a slight negative pressure in the combustion chamber.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

How do you find Net Stack Temp?

A

Gross stack temp - ambient temp = Net stack temp

This calculation helps determine the efficiency of the heating system.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What two measurements are used to calculate the efficiency on a fuel oil burner system?

A
  • CO2
  • Net stack Temp

These measurements reflect combustion efficiency and heat loss.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What does BNO stand for?

A

Burner Not Operating

Indicates a safety or operational issue with the burner.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What are signs that there is too much primary air going to the burner?

A
  • High CO2 reading
  • High stack temp

Excessive primary air can lead to inefficient combustion.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What does it mean if we have a white smoky flame?

A

Too much primary air

A white smoky flame is indicative of incomplete combustion.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What should be checked first when the burner is locked out on safety?

A

Reset button

The reset button is often the first troubleshooting step in safety lockouts.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

If you have voltage up to the black and white wires on a CAD cell, but no power at the orange and white wires, what would you check?

A
  • Thermostat, see if it’s on reset
  • Bad wire connections
  • Check the relay

This troubleshooting process helps identify electrical issues in the system.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

To check the voltage on a CAD cell control, where would you place your volt-meter leads?

A

Black & white wires

This is the standard method for checking voltage in CAD cell controls.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

To check for voltage up to the stack control, where would you place your volt-meter leads?

A

Terminals 1 & 2

Ensures proper voltage is present for stack control operation.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

During a normal cycle operation, when heat is sensed, what happens to the stack control contacts?

A

Hot closes and cold opens

This describes the behavior of contacts in response to temperature changes.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is the spacing from the nozzle when adjusting the electrodes?

A

1/16 inches from end of nozzle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is the overfire draft in most residential oil furnaces?

A

0.02 “ w.c.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Where is the fuel filter located?

A

Supply

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What are the five combustion tests that are performed?

A

Draft, smoke, Net stack, Co2, and efficiency

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

On a CO2 test, if the percentage is above 13%, what should be adjusted?

A

Primary air

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

When completing annual burner maintenance cleaning, where should the technician start?

A

Start at the chimney. Top to bottom

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

If electrodes show signs of crazing, what should be done?

A

Replace electrodes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

What fuel grade oil is most used in heating residential and light commercial buildings?

A

Red Diesel

22
Q

When performing an efficiency test on an oil burner, what is the first measurement to be tested?

A

Net Stack Temperature

23
Q

When completing combustion testing, what range should the CO2 reading be on an oil burning furnace?

A

9 - 13

24
Q

When doing an efficiency test on an oil burner, you should let the unit operate for how long?

A

Minimum 5 minutes, 1 wide cycle

25
Q

What two things must be replaced when completing an oil burner tune-up?

A

Oil filter & nozzle

26
Q

When checking a CAD cell, what is the maximum resistance that will keep the control from locking out?

A

1600 ohms

27
Q

What should the resistance across the Cad cell leads be when viewing the flame?

A

0.5 - 600

28
Q

What are the starting positions for the hot and cold contacts?

A

Cold closes & Hot open

29
Q

What meters the flow of fuel into the burner?

A

Nozzle

30
Q

What generates 10,000 volts needed to spark?

A

Ignition transformer

31
Q

What is insulated with ceramic to prevent electrical ground?

A

Electrodes

32
Q

What changes its resistance dependent on the light it senses?

A

CAD Cell

33
Q

What creates turbulence in the air-oil mixture to increase efficiency?

A

Flame Retention Head

34
Q

What device will shut the burner down in case the burner doesn’t fire?

A

Stack Control

35
Q

Will a shorter chimney have a better draft than a taller chimney?

A

NO, tall = Better Draft

36
Q

Will fuel oil burn in the liquid state?

A

No

37
Q

How are nozzles rated?

A

GPH, 100

38
Q

What is it called when the nozzle breaks up the oil?

A

Atomization

39
Q

What color dye is added to fuel oil to identify it for residential/light commercial furnace system?

A

Red

40
Q

For a two-pipe system, what must be removed for the pump to function correctly?

A

bypass plus

41
Q

Should you ever jumper a limit control?

A

NO

42
Q

Can high ambient temperatures cause a motor to overload?

A

Yes, Not enough airflow

43
Q

What is ‘puff Back’?

A

Unused fuel oil in the chamber, then fire it

44
Q

Does oil float on water?

A

Yes

45
Q

What are the three tests that are performed to test the fuel oil pump?

A

Pressure, vacuum, and cut-off-test

46
Q

What can cause low Stack temperatures?

A

Excess Draft, soot

47
Q

What type of transformer is used on a fuel oil burner system?

A

Step - up transformer

48
Q

Above ground tanks should be painted in what color?

A

Light color

49
Q

The fill and vent pipes should be pitched in what direction?

A

1/4” per ft

50
Q

What is the CAD cell wired to?

A

Primary control

OIL HEAT (1 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions