Oil Heat Technician Practice Exam

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• What are the normal colors for load-carrying conductors in electrical wiring?
• How would you define intermittent ignition?
• What is the proper support spacing for flexible conduit?
• Which organization is known for publishing specifications for various petroleum products?
• What type of electrical circuit is commonly used by warm air furnaces?
• Who is responsible for cleaning out the base of the chimney?
• Before testing a capacitor start motor with an ohmmeter, what must you do?
• What does the term "OHM" represent in electrical terms?
• What device is primarily used to protect the burner from overheating?
• In oil heating, why is the concept of pour point important?
• Where should a thermal switch be mounted for optimal performance?
• What method is most effective for testing an ignition transformer?
• Why is it essential for the ignition system to have a specific voltage output?
• What type of control is used to monitor the liquid level in a boiler?
• In oil heating systems, what does ZR stand for?
• What is the main function of the start switch in an oil burner?
• What should be the first step when troubleshooting an oil heating system?
• What happens during the reverse acting limit control operation?
• Which tool is best suited for cleaning the glue passages of a boiler?
• What is the minimum number of switches required in a warm air furnace electrical circuit?
• On what principle do electric relays operate?
• What must the stack mount primary control be before use?
• What is the primary reason for using high static pressure burners?
• What is the primary reason for designing a fuse?
• How many BTUs are contained in one gallon of #2 fuel oil?
• What condition may exist if the oil burner motor is noisy?
• Where should firematic oil valves be installed on above-ground oil supply tanks?
• What is the appropriate way to vent a waste-oil storage tank?
• What is the maximum amperage for a #14 AWG conductor?
• What gauge wire must be used for a 20 AMP circuit?
• Which switch must be positioned closest to the burner in an oil heating system?
• What element in a fuel tank promotes bacteria growth?
• Why is a low micron filter preferred in certain applications?
• Electrical controls in oil heating systems shall be connected in which circuit?
• What might be indicated by a noisy oil burner motor?
• What system is most critical for ensuring safe oil burner operation?
• What can happen if the oil pressure is too high in an oil burner system?
• How much free conductor should be left in an electrical box?
• What components of the oil supply system need to be cleaned or replaced during the annual tune-up?
• What action should be taken if a buried oil supply line is discovered to be unprotected and still in use?
• What distinguishes flame retention oil burners from non-flame retention oil burners?
• Corrosion is formed in the flue pipe when:
• In the United States, what is the normal number of AC cycles per second?
• What term is used to describe anything that uses electricity to perform useful work?
• What is one of the outcomes if a heat anticipator is set incorrectly?
• Modern oil burners operate with what CO2 levels?
• What is the purpose of a flame sensor in an oil burning system?
• For direct vent appliances, where must the intake and exhaust be located?
• In a situation where one zone of a three-circulator system is too hot, what could be the issue?
• What is the largest heat loss from an oil appliance attributed to?
• What happens to the output voltage of a transformer when the input is reduced?
• In a three-wire primary, what does the orange wire connect to?
• What is the standard color for ground wires?
• What type of electrical circuit has components arranged in a single path?
• Low water cut off controls are necessary for which types of boilers?
• Which of the following are unique characteristics of an ECM motor?
• What does interrupted ignition mean?
• When should a cad cell be cleaned to maintain optimal performance?
• In an adjustable head burner, what component must be adjusted to change the air ratio?
• What is the minimum height a vent hood must be above grade?
• Is a smoke reading of 1 acceptable for modern oil burners?
• When a limit control closes its contacts due to a rise in temperature, it is referred to as?
• When replacing an oil burner fan, which detail is most important?
• Corrosion in a flue pipe is likely to occur when the flue gas temperature is what?
• When replacing an oil burning appliance, which items must be updated to meet current codes?
• What is an indicator of low voltage in a burner control system?
• What component is essential for controlling the flow of oil to the burner?
• What must be done to a chimney before installing a new oil-burning appliance?
• When the voltage applied to the primary side of a transformer is reduced, what happens to the output voltage?
• Which component typically experiences the highest heat loss?
• What is the normal amperage draw for a split phase burner motor?
• Which device would be used to control the amount of voltage in a circuit?
• What term is used to measure electrical current?
• Which line is used to supply power for the post purge circuit?
• What effect does dirt or lint build-up in the blades of the burner fan have?
• When inspecting an oil storage tank, what should be checked for leaks?
• What term do we use to describe a good electrical circuit that provides a complete path for current?
• What is the minimum distance a vent hood must be located below windows, according to safety recommendations?
• What is an advantage of a PSC burner motor over a split phase motor?
• What is the final step after completing the annual tune-up?
• When investigating rough starts or delayed ignition, what condition should the electrode insulator be in?
• Are blower motor pulleys typically adjustable?
• What is the purpose of the anti-short bushing?
• How useful is combustion test equipment beyond marketing purposes?
• What corrective action should be taken when the FF terminals are jumped after startup and the control goes into lock-out?
• To adjust the air ratio for different firing rates on an adjustable head burner, what must be done?
• What is the primary purpose of the fan in an oil burner?
• When connecting both gas and oil appliances to the same chimney, what is required?
• What is the first step to take if the burner motor has power but won't turn?
• What is the desired CO2 reading for flame retention oil burners?
• What happens to a parallel circuit when one device fails?
• What is one of the main functions of bearings in a motor?
• What does the ZC designation refer to in an oil heating system?
• Under what circumstances is a post purge control required on a burner?
• What is the minimum wire size for a 20 amp circuit?
• Fuel filters with a smaller micron rating are considered to be what?
• What is the minimum wire gauge required for a 20-amp circuit?
• What type of burner design minimizes the need for adjustments during operation?
• Does a step-up transformer have more or fewer windings on the secondary coil compared to the primary coil?
• What tool is used to measure voltage?
• How is the capacitor wired in a PSC motor?
• Which of the following is an effect of a poorly maintained oil burner?
• Where is the retention ring typically mounted on an adjustable head oil burner?
• What is the primary purpose of the heat anticipator?
• What is a significant advantage of using a PSC burner motor?
• Which of these components is crucial for air management in oil burners?
• What is the purpose of high static pressure in burners?
• At what temperature is the flashpoint of a substance typically recorded?
• In what scenario might the cad cell fail to operate correctly?
• What can occur if there is a significant dirt build-up in the burner fan?
• What is the main purpose of low sulfur fuel?
• What determines the size of the conductor to be used in electrical systems?
• What is the primary purpose of mod-point grounding of a transformer?
• How many #14 AWG wires can be run in 3/8" FMC?
• Why is the direction of rotation important when installing a blower fan?
• What tool is commonly used to measure voltage in electrical circuits?
• What is the best method to prevent infiltrating air into a home?
• High limit controls are characterized as:
• Which component is essential for ensuring the safety of an oil burning system?
• Which maintenance activity helps ensure efficient operation of an oil burner?
• What are the normal colors of the load carrying conductors to switches?
• How many #14 AWG conductors can be pulled through a 4 x 1-1/4" square box?
• A cad cell control will go to the lock-out position when the reading is what?
• What determines the electrode settings for an oil burner?
• Capacitors are rated by which two categories?
• What is a potential consequence of having a faulty cad cell?
• What is the maximum length of unsupported FMC for equipment utilization?
• Which feature of flame retention oil burners contributes to cleaner combustion?
• Which type of oil has the highest energy content among commonly used heating oils?
• For safety reasons, how should vent hoods be positioned relative to snow levels?
• What is the primary reason for chamberless firing in oil burners?
• A switching relay can be used to control which of the following?
• What component is essential for regulating the flame height in an oil burner?
• How many times do you need to pump a 'wet' tester for an accurate CO2 sample?
• When adjusting an oil burner, why do we allow for excess air?
• What is a common sign that an oil burner motor requires servicing?
• Is it possible for an ignitor to operate without generating a spark continuously?
• What are the four general categories that most service calls for oil heating systems fit into?
• What is typically indicated by the presence of bacteria in a fuel tank?
• What is the primary purpose of a fuse in an electrical circuit?
• The terminals B1 and ZC in the Honeywell 8124 are connected to which devices?
• What is the primary function of a burner coupling?
• Which of the following is a common cause of ignition failure in an oil burner?
• What is a common fuel-related problem in oil heating that leads to inefficiencies?
• What device is responsible for ensuring proper fuel delivery in a burner?
• When conducting routine maintenance, how often should you check the fuel filter in an oil heating system?
• Which burner requires a Z dimension setting?
• How far should a vent hood be from inside corners for optimal safety?
• Which feature is characteristic of an Electrically Commutated Motor (ECM)?
• How many #14 AWG wires can be run in 1/2" FMC?
• What is the advantage of a fixed head burner?
• Why might an oil burner be equipped with a larger fan wheel?
• What is tertiary air in relation to combustion?
• Where is the retention ring mounted on an adjustable head oil burner?
• What happens to the flow rate at the nozzle when fuel temperature decreases?
• For an efficiency test, how long must the burner run to reach steady state conditions?
• What is the normal output voltage for an ignition transformer?
• Which of the following is a characteristic of low sulfur fuel?
• What does the term "continuity" mean in electrical terminology?
• Which types of blower assemblies are typically used in oil furnaces?
• What corrective action should be taken if the oil filter is found to be extremely dirty during replacement?
• What does the term OHMS represent in electrical terminology?
• What is the maximum length of unsupported flexible metallic conduit (FMC) for equipment utilization?
• What is a better option than a high micron filter?
• What is one advantage of using circuit breakers?
• Which type of ignition system remains on while the burner is running?
• What should you look at when a customer reports that their system is underfiring?
• In electrical circuits, what does L1 refer to?
• Interrupted ignition in an oil burner promotes the lifespan of which component?
• In a combustion circuit, what is the main function?
• What is the primary purpose of discharging a capacitor before testing?
• What is the normal limit control circuit voltage of a heating system?
• Which type of device can utilize a switching relay?
• What is the primary advantage of using low sulfur fuel compared to regular #2 heating fuel?
• What type of filter is considered superior for oil burn efficiency?
• What is the primary cause of water accumulation in a fuel tank?
• When selling new equipment, which item is often overlooked?
• What is the main cause of a primary control relay chattering?
• Why do some heating units experience more static pressure in the combustion zone?
• What type of burner is typically chosen for applications requiring lower emissions?
• Should the neutral side of the electrical circuit be connected to switches?
• Neutral and common in an electrical circuit generally refer to which part?
• Which of the following is a common sign of an oil burner malfunction?
• What is the main role of the retention ring in an oil burner?
• On a "rough" start service call, which system should be checked first?
• What is the key final adjustment for achieving optimal performance in most oil burners?
• What effect does a bad motor have on an oil burner system?
• How often are oil burners typically in the off cycle?
• What is the normal voltage output for an ignitor?
• Which of these chemical elements are commonly found in petroleum products?
• During the annual tune-up, what should be done if the burner is not operating efficiently?
• How can the operation of an oil heating system be affected by improper wiring?
• Which of the following is a common troubleshooting step for cad cell failures?
• Is the neutral side of the electrical circuit used for connecting switches?
• When troubleshooting an insufficient heat call, which item should be checked first?
• What is a common aftermath of not treating the oil tank for sludge when the filter is dirty?
• What is the minimum number of switches required for oil-fired appliances?
• Which adjustment might be necessary if a burner is smoking excessively?
• Why might some heating units demonstrate more static pressure in the combustion zone?
• Which type of ignition system turns off after the flame is established?
• Where are the tertiary air openings located on a fixed combustion head?
• At what maximum distance must sheathed cable be supported from a connection?
• What is mandated to be installed along with an automatic stack damper?
• Is safety timing the same as flame response?
• The red wire on Carlin microprocessor controls serves what purpose?
• Which type of fuel is considered important for our future energy needs?
• What is the normal voltage output range for an ignitor?
• What is the primary function of the motor overload switch?
• What percentage of heat loss can warm air ducts potentially have?
• Does fiberglass insulation completely eliminate heat loss in a building?
• What can be added to fuel oil to reduce the pour point?
• What is the key final adjustment for most burners?
• What is the purpose of the oil burner coupling?
• What type of air is essential for ensuring a complete burn of oil in a combustion system?
• What happens to amperage when a load is added to a parallel circuit?
• What is the recommended practice for connecting a burner motor?
• When more than 20 inches from a vent hood, where should the air intake be located?
• When measuring clearance to combustible materials, what is the recommended approach?
• Where are the tertiary air openings located on a fixed combustion head?
• What happens to oil as temperature increases?
• What type of hot water temperature switch provides the most accurate readings?
• What advantage does low sulfur fuel have over regular #2 heating fuel?
• What is the impact of high static pressure in a heating unit?
• What does a motor overload switch interrupt in case of overheating?
• What is the main goal of efficiency testing in oil heating systems?
• Which component's failure may lead to a furnace shut-off?
• What is the pour point of an oil?
• What is the primary role of the burning nozzle in an oil burner?
• Where is the retention ring mounted on an adjustable head oil burner?
• What is one advantage of using pre-purge operation in an oil burner?
• What is typically adjusted to improve burner efficiency?
• What is the purpose of adjusting the draw assembly in an adjustable head burner?
• Is seasonal efficiency an assessment performed during equipment tune-ups?
• What happens to the combustion air supply when dirt accumulates on the burner fan blades?
• What is often used to support a technician's diagnosis of an oil burner issue?
• What is a key benefit of using a start capacitor?
• What is a common cause of flue gas condensation?
• Upon finding a domestic coil in the boiler and facing a lack of hot water, what should you check first?
• What should be done before checking a capacitor?
• What fitting may be used when taking oil off the top of a storage tank?
• What type of ignition uses a spark that stays on for the entire time the burner runs?
• What is typically the recommended temperature setting for a residential hot water heater?
• What is a common sign of poor combustion in an oil burner?
• Why is it important to regularly check the combustion air supply of an oil burner?
• In wiring systems, what does the term 'ampacity' refer to?
• What does an increase in amperage indicate in a parallel electrical circuit?
• In residential buildings, what typically uses the most energy?
• When performing maintenance on oil burners, what is a common adjustment needed for efficiency?
• What is the purpose of L1 on a six-wire primary system?
• Which of the following is a critical reason for adjusting excess air in an oil burner?
• Who determines the proper electrode setting for an oil burner?
• Barometric dampers must be installed in what location?
• What is an effect of having oil-soaked porcelain in high-voltage equipment?
• Why is the outdoor design temperature important when setting up door temperature reset controls?
• Which brand of oil burner features a fixed retention head?
• What is an important characteristic of a bioheat fuel?
• What is a potential consequence of failing to discharge a capacitor before testing?
• Which component is responsible for supplying combustion air in a flame retention oil burner?
• What is the typical temperature setting for a high limit control?
• How often should an oil burning appliance undergo routine maintenance?
• Where is the shortest distance for the ignition spark to jump in an oil burner?
• When selecting the proper safety timing of a cad cell control, what is the most important factor?
• What is the normal ohms range for a cad cell during burner operation?
• During a leak detection check in an oil system, what should be inspected?
• Which factor does NOT affect cad cell performance?
• Which brand of oil burner is known for having a fixed retention head?
• What is the normal secondary voltage generated by an ignition transformer?
• When a burner motor gets submerged in water, what is the corrective action?
• Modern oil burners typically operate with a CO2 level of what range?
• What characteristic typically defines a non-flame retention burner compared to a flame retention burner?
• What component is crucial for ensuring proper air-fuel mixture in burners?
• What is the test procedure to check an ignitor?
• What should you investigate if a house gets too cold between heating cycles?
• The insulator of an electrode should be inspected for which of the following?
• What distinguishes flame retention oil burners from non-flame retention oil burners?
• What does ASTM stand for?
• What common issue can result from water contamination in heating oil?
• What is the most accurate device for testing voltage in oil heat systems?
• What is the primary purpose of a fuse in an electrical system?
• If no adjustments were made to the burner during the annual tune-up, should an efficiency test still be conducted?
• How many #14 AWG wires can be used in a 4' X 1 1/2 round box?
• What is the purpose of using a pressure reset in heating systems?
• In a parallel circuit, if one device fails, what happens to the rest of the devices?
• What is the type of piping arrangement provided for steam boilers?
• In a parallel circuit, what happens to the amperage as each load is added?
• What effect does dirt or lint build-up in the blades of the burner fan have on combustion?
• What type of machinery typically utilizes a start capacitor?
• Where should the firematic disconnect switch be located in relation to the oil-fired unit?
• What organization publishes specifications for many different petroleum products?
• When replacing an oil burner fan, what is crucial to consider?
• What role does a fuse play in protecting electrical circuits?
• When cleaning a boiler, what method is commonly used?
• Which of the following is not an indicator of proper oil burner operation?
• What is typically used as a reference point for defining flashpoint?
• If the oil pump pressure checks out good but the furnace won't light, what is a potential problem?
• What formula is used to determine amperage load?
• What is the BTU content of #2 fuel oil?
• What safety measure should be taken for treated pipes used in oil heating systems?
• What adjustment is necessary to change the air for different firing rates on an adjustable head burner?
• Which four steps should be taken during a no-heat call?
• What is a proper safety measure for an oil heating unit's power supply?
• What action should be taken if a technician finds multiple issues during an inspection?
• Which of the following is an example of a high static pressure burner?
• What is the term used to measure electrical current?
• What is the primary purpose of a fuse in an electrical circuit?
• What brand of oil burner is known to have a fixed retention head?
• In a four-wire primary system, which component does the blue wire connect to?
• What does an increase in temperature generally do to oil?
• Which devices should be tested for proper operation during an annual tune-up?
• TT terminals are primarily used for what purpose?
• What term is used to measure electrical current?
• What is the ignition temperature of #2 fuel oil?
• How do you take control out of latch up mode?
• What is the primary purpose of a cad cell in burner operation?
• What type of oil is typically used in residential heating systems?
• What is the function of a start switch in a PSC burner motor?
• What is the recommended clearance for vent hoods above public walkways?
• What type of heat loss does fiberglass insulation primarily prevent?
• What is defined as tertiary air in the combustion process?
• Which component is critical in determining the combustion process of oil burners?
• What characteristic does an overloaded circuit typically exhibit?
• Which of the following factors can affect combustion efficiency?
• Before resetting the system while responding to a no heat call, what should be confirmed?
• Which wire connector is the most commonly used?
• After adjusting a pulley for a blower, what reading should be taken?
• When using a series circuit, what happens to the current when any device fails?
• What occurs to the flow rate at the nozzle when the temperature of the fuel decreases?
• Why is it important to check all limits and safeties during a tune-up?
• What two basic chemical elements are primarily found in petroleum products?
• What is the first step in performing the annual tune-up for oil heating systems?
• Can oil-soaked porcelains cause leakage of high voltage in electrical systems?
• What is the function of the start switch in a burner motor?