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 License Exam: Questions and Answers, Exams of Engineering

A comprehensive set of questions and answers for the massachusetts oil burner license exam. It covers various aspects of oil burner operation, maintenance, and safety, including components, troubleshooting, and combustion efficiency. A valuable resource for individuals preparing for the exam and seeking to gain a deeper understanding of oil burner systems.

Typology: Exams

2024/2025

Available from 11/14/2024

tizian-kylan
tizian-kylan 🇺🇸

2.7

(21)

3.8K documents

1 / 62

Toggle sidebar

This page cannot be seen from the preview

Don't miss anything!

bg1
OIL BURNER LICENSE
(MASSACHUSETTS) EXAM NEWEST
ACTUAL EXAM WITH COMPLETE
QUESTIONS AND DETAILED ANSWERS
GRADED A | BRAND NEW!!!
The fan limit control on a warm air unit is used to: -
✔✔✔
Correct Answer > -Shut off the burner at a predetermined
temperature
-Start the blower at a predetermined temperature
-Stop the blower at a predetermined temperature
In all residential oil heating systems, the high limit control must
be: -
✔✔✔
Correct Answer > Line voltage and wired in series
with the primary control
Low voltage thermostats are more widely used van line voltage
thermostats because: -
✔✔✔
Correct Answer > They are more
sensitive to ambient temperature
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
pf34
pf35
pf36
pf37
pf38
pf39
pf3a
pf3b
pf3c
pf3d
pf3e

Partial preview of the text

Download Massachusetts Oil Burner License Exam: Questions and Answers and more Exams Engineering in PDF only on Docsity!

OIL BURNER LICENSE

(MASSACHUSETTS) EXAM NEWEST

ACTUAL EXAM WITH COMPLETE

QUESTIONS AND DETAILED ANSWERS

GRADED A | BRAND NEW!!!

The fan limit control on a warm air unit is used to: - ✔✔✔

Correct Answer > - Shut off the burner at a predetermined temperature

  • Start the blower at a predetermined temperature
  • Stop the blower at a predetermined temperature In all residential oil heating systems, the high limit control must

be: - ✔✔✔ Correct Answer > Line voltage and wired in series

with the primary control Low voltage thermostats are more widely used van line voltage

thermostats because: - ✔✔✔ Correct Answer > They are more

sensitive to ambient temperature

When a thermostat appears to be out of calibration, before

recalibration it is important to first: - ✔✔✔ Correct Answer > -

Be sure the thermostat is level

  • Check to see that the hole behind the thermostat is sealed off properly
  • Be sure that the thermostat is acclimated to the room temperature

The primary control must be capable of: - ✔✔✔ Correct

Answer > - Reacting to the absence of flame

  • Controlling the ignition and motor
  • Locking out on safety in the event of flame failure When an interrupted ignition stack mounted primary is

energized call - ✔✔✔ Correct Answer > The motor and ignition

relays pull in together When using a remote mounted heat sensing primary control,

the flame detector is often referred to as: - ✔✔✔ Correct

Answer > Pyrostat

In a one-pipe system, the minimum distance between the water level and the bottom of the lowest steam carrying pipe

is: - ✔✔✔ Correct Answer > 28 inches

To prevent scalding temperatures at the domestic water fixtures when using a tankless coil, it is important to install a: -

✔✔✔ Correct Answer > Tempering valve

A typical residential zone valve for a hot water heating system

normally operates on: - ✔✔✔ Correct Answer > 24 volts

In most residential hot water heating systems, the design temperature difference between the supply and return water

is: - ✔✔✔ Correct Answer > 20 ° F

To properly size a zone circulator, you must know the following:

- ✔✔✔ Correct Answer > The gpm and feet of head of the piping The _____ is used to prevent gravity circulation through the

system when the boiler maintains temperature. - ✔✔✔ Correct

Answer > Flow control valve

Tribulations in the tubes of a fire tube boiler: - ✔✔✔ Correct

Answer > Increase efficiency In a forced warm air system, the return air duct size should

never be less than ______ of the supply air duct size. - ✔✔✔

Correct Answer > 80 percent On a cold day, the burner is cycling on and off the flame is sufficient but the complaint of insufficient heat may be caused

by: - ✔✔✔ Correct Answer > Faulty or improperly set high limit

Short cycling of the burner can be caused by: - ✔✔✔ Correct

Answer > - The heat anticipator not set properly

  • High limit set too low
  • Oversized equipment The proper location for the vacuum gauge when testing a fuel

unit and supply line is: - ✔✔✔ Correct Answer > A suction port

One reason oil would drop from the nozzle after the burner

shuts down is: - ✔✔✔ Correct Answer > A faulty fuel unit cut-

off

Before lowering the temperature of a hot water boiler,

consideration must be given to the: - ✔✔✔ Correct Answer >

Design of the heating system The boiler or furnace is not the only source of heat loss. The

heating system can lose heat through: - ✔✔✔ Correct Answer >

  • Uninsulated steam pipe
  • Uninsulated hot water pipe
  • Uninsulated warm air ducts A condition often overlooked on a call involving odors is: -

✔✔✔ Correct Answer > Insufficient air in the boiler room

One method of removing oil and dirt from a newly installed

steam boiler is to: - ✔✔✔ Correct Answer > Skim the boiler

through a nipple at the water level after a few days If a cad cell is "seeing" light when the thermostat is connected

to the T-T terminals calls for heat: - ✔✔✔ Correct Answer >

The primary control will not energize

A reverse acting aquastat is used in a hydronic system to: -

✔✔✔ Correct Answer > Stop the circulator when the water

temperature falls below a preset temperature Burner air fans are manufactured to very close tolerances

because an unbalanced fan can: - ✔✔✔ Correct Answer > - Put

a strain on motor bearings

  • Create vibrations When wiring a burner for intermittent ignition using a stack type primary control, the transformer is wired to terminals 2

and - ✔✔✔ Correct Answer > 3

Which substance offers the most resistance to the flow of

electricity? - ✔✔✔ Correct Answer > Carbon

What must be done to a draft gauge before use? - ✔✔✔

Correct Answer > Zero out the scale Which of the following is considered the better chimney? -

✔✔✔ Correct Answer > Cement block with a tile liner

Increasing the air input to gain a cleaner fire will also increase

the: - ✔✔✔ Correct Answer > Flue gas temperature

A single stationary conductor in the flux of a permanent

magnet will: - ✔✔✔ Correct Answer > - NOT induce a current

flow in the conductor

  • NOT reverse the current flow in the conductor
  • NOT increase the amperage in the conductor

When installing a power vent system: - ✔✔✔ Correct Answer >

Follow the manufacturer's installation guide To test a stack mounted primary control safety, you should: -

✔✔✔ Correct Answer > Remove the unit from the flue pipe

An advantage of power venting is: - ✔✔✔ Correct Answer > -

Installing an oil fired unit where there is no chimney

  • More positive control of draft
  • Lower cost of new homes What is the approximate safety timing of stack mounted

primary controls? - ✔✔✔ Correct Answer > 60 to 90 days

The best way to adjust an oil burner is: - ✔✔✔ Correct Answer

> With combustion test equipment What is the correct procedure for performing a combustion

efficiency test? - ✔✔✔ Correct Answer > - Draft

  • Smoke
  • CO

The temperature of fuel oil can affect: - ✔✔✔ Correct Answer >

  • Flow rate
  • Droplet size
  • Soot formation

Which of the following does not affect draft? - ✔✔✔ Correct

Answer > Boiler design

What does AFUE stand for? - ✔✔✔ Correct Answer > Annual

Fuel Utilization Efficiency

Increasing fuel pump pressure will _______ flow rate through

the nozzle. - ✔✔✔ Correct Answer > Increase

Incomplete combustion causes? - ✔✔✔ Correct Answer > -

Soot and smoke

  • Poor efficiency
  • Low CO One advantage to light weight combustion chambers is they: -

✔✔✔ Correct Answer > Cool down quickly

Flame retention oil burners do not depend as much on _______

for good combustion as did older burners. - ✔✔✔ Correct

Answer > Air

Breaking up oil into small droplets is called: - ✔✔✔ Correct

Answer > Atomization Excess air in the combustion process lowers system efficiency

by: - ✔✔✔ Correct Answer > Raising flue gas temperatures

Two properties of light weight combustion chambers are: -

✔✔✔ Correct Answer > Rapid heat up and rapid cool down

What are three types of heat transfer - ✔✔✔ Correct Answer >

radiation, conduction, convection When a boiler or furnace is oversized, off cycle heat loss

______ and efficiency decreases. - ✔✔✔ Correct Answer >

Increase Which are advantages that new and properly adjusted oil fired

boilers and furnaces offer over older units: - ✔✔✔ Correct

Answer > - Economical operation

  • Improved reliability
  • Cleaner operation What is the temperature range of combustion with a new

burner and boiler or furnace combination? - ✔✔✔ Correct

Answer > 2500° to 3200°F

The annual fuel utilization efficiency (AFUE) is: - ✔✔✔ Correct

Answer > A test performed to rate boilers and furnaces.

Which of the following is a type of draft? - ✔✔✔ Correct

Answer > - Natural

  • Forced
  • Induced Heat losses that are directly affected by chimney operation? -

✔✔✔ Correct Answer > - Burner on cycle flue heat loss

  • Off cycle heat loss
  • Air infiltration heat loss The draft produced by the chimney ______ as outdoor

temperature drops - ✔✔✔ Correct Answer > Increases

The draft produced by a chimney _______ as the chimney

height increases - ✔✔✔ Correct Answer > Increases

The following are important factors that affect chimney

performance: - ✔✔✔ Correct Answer > - Wind

  • Burner firing rate
  • Air flows caused by housing exhaust fan

The flue connection from the outlet of the boiler or furnace to the chimney base should be as ______ as possible to maintain

good draft - ✔✔✔ Correct Answer > Short

A common source of air leakage into the chimney is: - ✔✔✔

Correct Answer > Loose fitting clean out door at base of chimney What is the minimum NET temperature needed at the breaching of an oil fired appliance to prevent condensation

problems? - ✔✔✔ Correct Answer > 385 °

The main parts of the chimney venting system used in oil

heated houses are: - ✔✔✔ Correct Answer > - Chimney

  • Flue gas collector
  • Draft control (barometric damper) When installing a vent for outdoor air, codes recommended an outdoor air opening of one square inch for every ______ BTU

per hour of fuel consumed. - ✔✔✔ Correct Answer > 5000

Power chimney venting: - ✔✔✔ Correct Answer > Uses a fan to

power vent In power vented systems, the vent cap does the following: -

✔✔✔ Correct Answer > Minimize effect of wind

In a power venting system, what safety device cuts the burner

off if the power vent does not operate? - ✔✔✔ Correct Answer

> The fan proving switch What ways are there to heat domestic hot water using home

heating oil? - ✔✔✔ Correct Answer > - Direct fired

  • Indirect water heater
  • Internal tankless coil

Radiation is heat transfer without direct contact. - ✔✔✔

Correct Answer > True

Should hot water piping be insulated to save energy? - ✔✔✔

Correct Answer > Yes

The 1/4" drilled in the flue pipe for combustion testing should

be located: - ✔✔✔ Correct Answer > Between the boiler

breach and draft regulator A significant difference between the CO2 or O2 reading at the

flue pipe and over the fire is indication of: - ✔✔✔ Correct

Answer > Air leakage in the boiler A zero smoke and low CO2 or high O2 reading could be caused

by: - ✔✔✔ Correct Answer > Too much excess air

The normal range of flue gas temperature measured at the

boiler outlet for new modern equipment is: - ✔✔✔ Correct

Answer > 350 ° to 500°F When draft readings cannot be taken over the fire, what range

is acceptable at the boiler outlet? - ✔✔✔ Correct Answer > -

0.04"wc to - 0.06"wc An acceptable smoke test reading for new modern equipment

is: - ✔✔✔ Correct Answer > Between #0 and