Edwin says all governors will maintain idle speed to prevent stalling. Logan says electronic governors can provide additional features except for cruise control. Who is correct?

During a science experiment, Tristin and Logan observed that air-fuel ratios less than __________ will produce smoke.

Aidan and Marion are discussing diesel engines. Aidan asks, 'Do you know at which RPM the most ___________ is produced in a diesel engine?'

During a class discussion, Ethan and Logan were debating which type of mechanical governor would be best suited for on-highway and power take off modes. What is the correct answer?

During a car maintenance class, Clayton asked, 'The purpose of the throttle break over is to __________.'

Edwin and Dominic are working on a project about engine protection. How many settings are adjustable within the engine protection parameter set?

Logan and Ethan are working on a car's engine control module (ECM). What type of programming involves the installation of look-up tables in the ECM?

Aidan and Logan were discussing how some cars use battery power to keep the RAM memory intact when the key is off. This is known as __________.

During a computer science class, Tristin asked, 'What is the shortened term for binary digit?'

Tristin and Edwin are working on a project where they need to transmit information from one electronic module to another. They decide to use __________ data for this purpose.

During a classroom discussion, Marion asked, '__________ refers to the number of data bits transmitted per second.'

During a science experiment, Ethan noticed that a vacuum valve in a fuel cap lets __________.

Andrew says that diesel engines require a low-pressure fuel supply to transfer fuel to the high-pressure system. Tristin says the engine needs pressure and volume from the low-pressure fuel system for the engine to function correctly. Who is correct?

During a science experiment, Kyle and Marion need to measure the fuel volume. They can use a __________.

During a science project, Edwin and Dominic observed that the pressure of fuel delivery out of a positive displacement pump increases as __________

During a car maintenance class, Marion asked, 'A fuel return check valve __________.'

During a science experiment, Edwin and Logan observed that at too low of a temperature, the __________ in fuel becomes too viscous to properly flow through filters and lines.

Edwin says that principles of electronic signal processing are now being applied to provide more efficient diesel fuel injection systems. Dominic says more efficient fuel injection systems are being driven by the demand for cleaner engine emissions, increased engine power, quieter operation, and better fuel economy. Who is correct?

During a class discussion, Kyle mentioned that electronic distributor pumps were no longer used with on-highway engines manufactured after __________.

In 1998 both misfire detection and _____________ were added to the Stanadyne DS-4 control system in order for it be compliant to OBD-II legislation. Logan and Edwin were discussing this in their automotive class.

During a classroom discussion, Clayton asked which of the following statements is correct with regard to the OEM low-pressure fuel transfer pump?

Logan and Aidan are working on a car engine. Which of the following could be the result of a faulty needle lift sensor?

Andrew and Logan are working on inspecting and replacing a caps injector quill tube. Which of the following statements is correct about this process?

During a car maintenance class, Ethan asked, 'Maximum injection pressure is available at __________.'

During a classroom discussion, Dominic asked, "The name 'common rail' may also be called __________."

During a science experiment, Edwin observed that the beginning of injection occurs when the __________.

Technician Marion says piezoceramic actuators are more durable than servo-hydraulic actuators, which have greater wear rates. Technician Logan says because most heavy-duty engines do not commonly exceed 2500 RPM, the servo-hydraulic actuators are able to respond faster and with an adequate number of injection events. Who is correct?

During a science project, Tristin and Aidan discovered that parasitic loads of a high-pressure pump can reach lost horse power of __________.

During a science experiment, Logan and Aidan discovered that fuel quill tubes are sealed by __________.

Edwin and Logan were discussing car maintenance. Seized or binding actuators are major problems for VGTs. _______ in the vane of sliding nozzle can prevent proper VGT operation

During a classroom discussion, Aidan asked which of the following statements is correct with regard to series connected turbochargers?

During a science experiment, Marion and Kyle observed that exhaust gas backpressure can reach __________ to overcome intake air pressure.

During a classroom discussion, Tristin asked which of the following statements is correct about variable geometry turbochargers?

During a robotics club meeting, Edwin asked, 'CAN stands for....?'

Logan and Kyle are working on a vehicle project. They need to know the maximum data rate allowed by high speed CAN, which is used in vehicles. What is the data rate?

During a classroom experiment, Kyle and Logan measured the voltage levels of a CAN bus. At logic 0, CAN High and CAN Low were applied at ....?

During a classroom discussion, Tristin asked about the meaning of ECM in automotive technology. What does ECM stand for?

During a car maintenance class, Aidan asked the instructor about the meaning of EGR:

Kyle and Marion are discussing the chemical formula CO. What does CO stand for?

During a science class, Edwin asked, 'Combustion quality of Diesel fuel is rated in:'

During a science class, Ethan and Kyle were discussing engine mechanics. Ethan said that the fuel injection pressure is lower than the cylinder compression pressure. Is Ethan correct?

Marion and Aidan are discussing car engines. Marion says the intake stroke is followed by the power stroke. Is Marion correct?

Edwin and Dominic were discussing the early development of CI engines. Edwin mentioned that CI engines were initially developed to use coal dust and peanut oil. Is this true?

During a science class, Clayton asked if diesel fuel is ignited by glow plugs.

Andrew and Tristin are discussing how a car engine works. Andrew says that fuel burned creates expanding energy which is then converted to mechanical energy. Is he correct?

Andrew and Logan are working on a car engine. They notice that the camshaft spins at ________ the speed of the crankshaft. Can you help them figure out the correct ratio?

During a classroom discussion, Dominic mentioned that diesel engines inject fuel during the intake stroke to achieve a better air/fuel mixture. Is this statement correct?

During a car maintenance class, Aidan asked if Top Dead Center (TDC) refers to when the piston is at its most upward travel.

Marion and Ethan are working on a car engine. What stroke is being represented by the image?

The piston is traveling down and both valves are closed.

What stroke is being represented by the image?

The piston is traveling up and both valves are closed.

What stroke is being represented by the image?

The piston is traveling down and the intake valve is open.

What stroke is being represented by the image?

The piston is traveling up and the exhaust valve is open.

Maximum injection pressure is available at __________.

Technician A says modern common rail (CR) refers to a classification of high-pressure fuel injection systems in which pressurization of fuel is accomplished independently of engine speed. Technician B says fuel injection pressure is matched to optimal values required for the most efficient combustion, lowest emissions, highest power output, and best fuel economy. Who is correct?

Technician A says the basic concept of common rail injection is simple: supply fuel at injection pressure to a fuel nozzle that electrically controls the injection event. Technician B says the common rail system's modular design lends flexibility for adaptation to any new or updated diesel engine design. Who is correct?

What do greater rate-shaping capabilities do?

The name "common rail" may also be called __________.

Beginning of injection occurs when the __________.

Technician A says the difference between the CRS1 and CRS2 injectors is in the nozzle. Technician B says the nozzle valve closing speed is determined by the flow through the inlet orifice. Who is correct?

Which of the following statements about Siemens CR injectors injection is NOT correct?

Fuel drained from the Denso injectors is directed to the __________.

Technician A says piezoceramic actuators are more durable than servo-hydraulic actuators, which have greater wear rates. Technician B says because most heavy-duty engines do not commonly exceed 2500 RPM, the servo-hydraulic actuators are able to respond faster and with an adequate number of injection events. Who is correct?

When discussing common rail fuel systems; Technician A says to minimize parasitic loss, newer high-pressure fuel pumps have inlet metering capabilities . Technician B says the metering capabilities of newer high-pressure fuel pumps will increase engine power output and fuel economy. Who is correct?

When will the flow-limiting valve reset?

Technician A says the CP2 Bosch pump is a three-piston pump used on commercial vehicles. Technician B says the CP3 pump is a third-generation axial piston pump used with second-generation CRS2 injectors. Who is correct?

Parasitic loads of a high-pressure pump can reach lost horse power of __________.

Technician A says the high-pressure pump is driven at engine speed and coupled to the engine through a gear drive mechanism. Technician B says the torque required to turn the high-pressure pump is as little as 6 ft-lb (8.1 Nm). Who is correct?

A fuel mass observer algorithm is compared to a volume of __________ in the exhaust flow.

Fuel quill tubes are located within the __________.

How many fuel return flows can be measured in a modern HPCR-fueled engine?

To detect a leaking common rail injector to fuel return, what must the technician do?

Fuel quill tubes are sealed by __________.

At too low of a temperature, the __________ in fuel becomes too viscous to properly flow through filters and lines.

Technician A says that low diesel fuel temperature causes problems, but high fuel temperatures are not a problem. Technician B says that both low and high fuel temperature can cause problems with diesel fuel. Who is correct?

Select one:

Which of the following statements is correct concerning fuel tank ventilation?

Select one:

A fuel tank pickup tube works by means of __________.

Select one:

Technician A says that fuel-water separators, water-in-fuel sensors, fuel heaters, and filters are often integrated into a single compact unit. Technician B says that water-in-fuel (WIF) sensors use an electrical conductivity probe to sense a specific level of water in fuel and cause a dash-mounted light to illuminate. Who is correct?

Select one:

Which of the following statements is correct with regard to priming fuel systems?

Select one:

Technician A says that deteriorated check valves can effect outlet pressure of a mechanical diaphragm pump. Technician B says the diaphragm pumps are not used in diesel engine fuel systems. Who is correct?

Select one:

Which acronym is associated with Detroit Diesels diagnostic software system?

All of the following are functions of the low-pressure fuel system, EXCEPT __________.

Select one:

Low-pressure fuel systems include features to inform the operator of _________________. 

Select one:

An EGR flow rate that keeps the exhaust oxygen concentration at ____% is optimal for low emissions and engine performance.

White smoke can be caused by (mark all that apply)

Name the 2 sides of a turbo

What is the primary function of the Diesel Particulate Filter (DPF) in a vehicle's exhaust system?

Black smoke can be caused by ( Mark all that apply)

Technician A says Diesel Emissions were established in the 1970's. Technician B says todays Diesels must comply with regulations to reduce emissions.

Modern diesel engines emit...

Tech A says Volatile organic compounds (VOC's) mix with chemicals in the atmosphere to create Ozone. Tech B says Diesel and Gasoline engines create the same amount of VOC's. Which one is correct?

Technician A says that black smoke from the exhaust of a diesel engine is evidence of particulate emission. Technician B says that black smoke is just soot which will harmlessly fall to the ground. Who is correct?

Carbon monoxide is a result of...

Typically carbon dioxide (CO2) emissions from diesels are...

Tech A Says Off road diesel equipment has no regulations. Tech B says Off road diesel has its own specialized standards called Tier Standards. Which tech is correct?

Which organization sets the standards and regulations that the all road going car in the US must comply to?

HD-OBD has specific standards governing which of these?

The First standards to reduce Diesel Emissions Started in which year?

Tech A says that a HD-OBD will have 6 pins. Tech B says that it will have 9 pins. Who is correct?

Diesels high compression pressure and excess combustion air lowers the following exhaust emission to almost insignificant levels.