Docsity
Docsity

Prepare for your exams
Prepare for your exams

Study with the several resources on Docsity


Earn points to download
Earn points to download

Earn points by helping other students or get them with a premium plan


Guidelines and tips
Guidelines and tips

Massachusetts Oil burner Practice exam 2025 latest update 300+ questions with correct answ, Exams of Oil Engineering

Massachusetts Oil burner Practice exam 2025 latest update 300+ questions with correct answers already graded A+ |PROFESSOR verified

Typology: Exams

2024/2025

Available from 04/10/2025

lenah-smith
lenah-smith šŸ‡ŗšŸ‡ø

632 documents

1 / 51

Toggle sidebar

This page cannot be seen from the preview

Don't miss anything!

bg1
Massachusetts Oil burner Practice exam 2025
latest update 300+ questions with correct
answers already graded A+ |PROFESSOR
verified
If a stack relay fails you, must?
Replace it with an approved type controller
Aquastats are normally found on what type of heating systems?
Hydronic
Airstats are found on what type of heating systems?
Forced warm air systems
Under sized returns on a warm air system can result in what?
Short cycling of the oil burner
Incorrect nozzle selection in regards to gallon per hour, can result in what problems in a steam system?
Some radiators not heating quickly enough
pf3
pf4
pf5
pf8
pf9
pfa
pfd
pfe
pff
pf12
pf13
pf14
pf15
pf16
pf17
pf18
pf19
pf1a
pf1b
pf1c
pf1d
pf1e
pf1f
pf20
pf21
pf22
pf23
pf24
pf25
pf26
pf27
pf28
pf29
pf2a
pf2b
pf2c
pf2d
pf2e
pf2f
pf30
pf31
pf32
pf33

Partial preview of the text

Download Massachusetts Oil burner Practice exam 2025 latest update 300+ questions with correct answ and more Exams Oil Engineering in PDF only on Docsity!

Massachusetts Oil burner Practice exam 2025

latest update 300+ questions with correct

answers already graded A+ |PROFESSOR

verified

If a stack relay fails you, must?

Replace it with an approved type controller

Aquastats are normally found on what type of heating systems?

Hydronic

Airstats are found on what type of heating systems?

Forced warm air systems

Under sized returns on a warm air system can result in what?

Short cycling of the oil burner

Incorrect nozzle selection in regards to gallon per hour, can result in what problems in a steam system?

Some radiators not heating quickly enough

Low boiler water temperature in a hydronic hot water system may be caused by?

Undersized oil burner nozzles

Delayed opening oil valves are used to?

Allow oil pump to come up to speed

If a steam boiler is to be installed with an automatic feeder it must also have:

A backflow prevention device

How can a damaged heat exchanger be detected on a forced warm air system?

With a smoke trace candle

If a high limit is installed to prevent high boiler water temperature, what is the function of the low limit?

To maintain temperature for domestic hot water

On a steam system, a plugged siphon loop can have what affect on the heating system?

Insufficient heat in the living space

On a triple acting aquastat a minimum of 20 degrees is recommend between the high and low limit, this will prevent?

The boiler going off on high limit before reaching the minimum circulator temperature

When is an automatic draft control not required?

When the equipment is designed to control the draft.

Combustion performance testing can indicate:

Improper air oil mixture, too much combustion air, and low pump pressure.

If a second oil-burning appliance is installed in a single chimney, you must insure:

Sufficient draft is available for safe operation of all connected equipment.

Delayed ignition can be caused by:

Weak ignition transformer

You should replace the oil burner nozzle with:

The manufacturers recommended nozzle spray pattern and spray angle.

Viscosity problems can be corrected by:

Decreasing the nozzle size and increasing the pump pressure accordingly

The minimum operating pressure of an oil pump is:

100 PSI

The pour point of #2 oil

Can be lowered by blending with kerosene, can be lowered with fuel additives, and is the lowest temperature at which it will flow

Maximum fuel allowed without a license

10,000 gallons

Is heating oil gets colder its viscosity (thickness):

Increases

Sulfuric acid in combustion gases can:

Damon's the flue lines, it holds in the flue pipe, and create a scale buildup in the heat exchanger

The home for bacterial growth and sludge in the bottom of the oil tank is

Water

To ensure clean, uncontaminated fuel reaches the oil burner you must

Install tanks properly, regularly inspect and fix minor defects before they lead to major problems, and install a quality oil filter

Water in oil tanks come from

Condensation, loose or missing fill and vent caps, and failing to drain water from a tank before installation

It is best to connect your unit as a one pipe system instead of a 2 pipe system because

One pipe leads to longer filter life and eliminates worries about leaking return lines

A fuel de-aerator:

Eliminates the need for a return line back to the tank

A cause of pulsating oil pump pressure and a pulsating fire is

Air leaks in the suction line

Increasing the fuel pump pressure will

Increase the flow rate

The purpose of an oil burner nozzle is to

Automize the oil, provide a pattern of oil spray, and meter the amount of oil burned

When replacing nozzle

Follow the manufacturer's recommendations

To reduce combustion problems caused by cold oil

Increase the pump pressure, install a nozzle line pre-heater, and use additives or kerosene to lower viscosity

cross connection between two supply tanks is not supposed to exceed?

660 gallons

Nozzle after trip can be caused by

a defective pressure regulating valve, air in the nozzle line, and oil expansion in the nozzle after shut down

The flow rate stamped on the nozzle is based on:

100 PSI

A proper combustion chamber:

Is large enough so the fire doesn't touch (impinge on) any surface, reflects heat back into the fire, and is made of material (like ceramic) that heats up quickly and cools off quickly

Too much draft over the fire can occur when

There are leaks between the sections of the boiler that let basement air into the heat exchanger

Name the 3 functions of an Oil Burner nozzle?

Atomize, Meter, Patter.

What are the 2 voltage circuits of a primary control?

Line & Low.

What is the function of a fuse?

What is the Required minimum height required for fill and vent pipes?

3 Feet.

What is the smallest vent pipe used for residential.

1 inch 1/

What size is the oil line for a residential burner?

3/

Largest oil capacity for residential without a license?

10,000 Gallons

At what height ceiling would a second thermal switch be required?

12'

A typical residential oil burner is also s/u to run Kerosene True? Or False?

False

Permit to install an oil burner is issued by the?

State Fire Marshall

Draft measurements are taken in what?

Inches of water column

Pressure Relief for a Hot Water Boiler is?

30 Psi

Pressure Relief for a Steam Boiler is?

15 Psi

How many cubic feet of Air is required for a 1 gallon nozzle?

1,

If a power vent fails to start or shuts down during operation, will this affect the burner? Yes? Or No?

Yes

A hot water boiler requires a low water cutoff if it exceeds 300,000 B.T.U.s.

False

What is the proper draft setting for an oil burner?

.02 Inches WC

What is the minimum size of pipping for copper and black pipe in a residential installation?

3/8 unless over 100 ft

If you increased the air on a burner what would happen to the Co2 Reading?

It would go down

If you increased the air on a burner what would happen to stack temperature?

It would go up

Give 2 reasons why draft is necessary?

Remove flu gasses & efficiency.

Would an increase in excess air raise or lower the stack temp?

Raise

Where should a hot water temp operating control not be located?

Away from the tankless coil

What are the requirements for pressure controls for boilers?

Line Voltage, ( Max 15 psi ) , Mounted on pigtail, and above water line.

What info on an oil burner certifies it has been approved by the Marshall?

Mass Approval #

What is a scavenger period?

Pre + Post Purge

What are two methods used by domestic oil burners to prepare oil for combustion.

Atomize & Vaporize

What is composition of #2 fuel oil?

85% carbon & 15% Hydrogen

What must be installed on gravity oil burners for safety?

Constant Level Valve

After a Thermostat has been installed what should be checked?

Level, Heat Anticipator, Calibration

What is a Cad Cell?

A light sensitive Resistor

What is the melting point of solder used on oil lines?

500 Degrees F

Inner parts of a nozzle can be changed? True? Or False?

False. You never change the inner parts of a nozzle

What do we mean by differential with regards to a pressure trol?

Cut out & Cut in

How many BTU's in a Gallon of #2 fuel oil?

140,000 Btu's

How is an electrical solenoid valve wired and where is it installed?

Wired in parallel & installed to the motor

What is a series circuit?

One path for electrons to flow

What is a camium sulfide cell?

A visual Flame detector

How would you test the safety timing on a stack switch?

Disconnect T 3

Can material other then steel be used for construction of a light fuel oil tank?

Yes if Approved

What are the requirements when installing two tanks together to a common supply line?

Tanks must be level

What is the voltage found on the TT Terminals?

24v

What gauge wire is used for a T Stat?

18 Guage

Is Carbon Monoxide a desirable flue gas?

Hell no!

What is the purpose of a low limit control on a steam or hot water boiler?

Maintain boiler temperature for domestic

What is a by pass plug used for?

2 pipe system

How long after the completion of an installation must a certificate of completion be submitted?

What is electrical continuity?

Complete path

What is a parallel circuit?

More then one path for electrons to flow

What is the function of a draft regulator?

To maintain a steady draft

What are the five parts of a Backarach smoke test kit?

Draft Gauge, Smoke pump, Co2 analizer, thermometer, & effiency chart.

What are two reasons for a lockout on a stack switch with combustion established?

Dirty Helix or low stack temperature

What is the function of the hot contacts on a stack primary?

Power the motor

What do six terminals on a stack switch go to?

  1. Hot 2) Neutral 3) Motor 4) Transformer, TT to Thermostat

When is an oil gauge required?

Any tank with a fill and vent pipe

When are swing joints required?

When ever you need pitch

What is a power burner?

Any burner other than a gravity feed or a pressure feed

Why are low voltage t stats used more then line voltage

Main reason because low voltage ones are much safer. Also low voltage t stats are more accurate and less expensive

Is it permissible to use manually operated smoke pipe dampers

Yes, on sleeve burners only.

How is a stack switch put "in step"?

Pull out clutch arm a half inch or so and release slowly. This aligns operating contacts. Cold contacts will close and hot contacts will open.

A hot water boiler is showing 12 psi, How far will it raise the water?

28ft