Space-a Truckers
What two principles of fluid friction are used by an engine lubricating system?
What is a common indicator that in engine oil has become contaminated with diesel fuel?
What is an indication that engine oil has become contaminated with engine coolant?
Which of the following is an undesirable constituent of engine oil?
Which of the following properly defines viscosity?
What API oil classification is recommended for engines fueled by ultra low sulfur(ULS)fuel?
In which of the following applications is the use of a synthetic engine oil especially recommended?
When should a diesel engine crankcase oil level be checked for the most accurate reading?
What type of engine oil pump is most commonly used on truck diesel engines?
Which of the following values would be typical of engine oil at operating temperatures?
What type of oil pressure sensor is most commonly used on electronically managed diesel engines ?
When an engine oil analysis profile taken on a high mileage engine indicates higher than normal levels of copper which of the following components would more likely be at fault?
If a C1-4 engine lubricating oil was used and place of the OEM specified CJ-4, which of the following components could be damaged?
Technician a says that CJ-4 diesel engine lubricating oil is backward compatible with all previous diesel engine lube oil classifications. Technician B says that that digit 4, in CJ-4 means that the oil is suitable for 4-stroke cycle engines. Who is correct?
Technician a says that the highway diesel engines equipped with EGR should use a lube oil formulated to API CI-4 classification or later. Technician B says that CI-4 oil is lower in cost and can be safely used in Diesel Engines built before the 2007 EPA year. Who is correct?
Which of the following methods would produce the most reliable results when drawing a sample of lube oil analysis?
Technician A says that most engine OEMs recommend priming full flow oil filters following an oil change.
Technician B says that failure to prime a full flow oil filter following engine lube service may damage the turbocharger when the engine is started. Who is correct?
When an oil sample analysis indicates elevated levels of silicon, Which of the following should be inspected 1st?
How is rejected heat dissipated in a typical diesel engine?
When the heat of combustion is transmitted through a diesel engine block, the principal is known as:
Which of the following does NOT act as a heat exchanger?
When water freezes, how much does it expand in volume?
Which of the following coolants boasts the longest service life?
Which of the following fluids transfers heat most efficiently?
What mixture concentricity of propylene glycol to water provides maximum antifreeze protection?
Which of the following pH readings taken in engine coolant fall in the normal range?
Which of the following is NOT true of an extended life coolant (ELC)?
Which type of radiator uses a double pass principle?
When truck radiator hoses collapse internally as an engine cools, which of the following components should be checked first?
Which component in a truck cooling system requires that the coolant has some lubricating properties?
What device is used to signal engine coolant temperatures on most current diesel engines?
In an older truck cooling system using Radiator shutters, what would happen if the air supply to the shutterstat failed?
Which of the following could be handled by a data bus communications in a current diesel engine cooling system?
Tech A says that diesel engines equipped with water manifolds have more even actual cylinder temperatures. Tech B says that in engines not equipped with water manifolds, the cylinders closest yo the radiator are likely to run warmer when the engine is at operating temperatures. Who is correct?
Tech A says that downflow radiators use a double pass flow principle. Tech B says that a counterflow radiator uses double pass flow routing? Who is correct?
What should always be used to adjust fan belts?
Tech A says that the first step to take when troubleshooting an engine overheating conditioning is to remove the radiator shroud to permit unimpeded air flow through the engine compartment. Tech B says that an engine overheat condition could be a missing or damaged radiator shroud. Who is correct?
Which type of engine coolant offers the best protection against liner cavitation erosion?
Which of thr following intake dystem components would be exclusively associated with a 2-stroke cycle diesel engine?
What would be a typical maximum intake restriction specification for a naturally aspirated diesel engine?
What is the critical flow area inside the turbine housing of a turbocharger known as?
What should be used to measure the radial play of a turbine shaft.
After running a diesel engine under heavy load, how long should the engine be idled before shutdown?
What is used to cool an air-to-air charge air cooler?
What is used as the cooling medium in heat exchanger known as after coolers and intercoolers?
Which of the following components makes detailed tuning of diesel engine intake manifolds unnecessary?
Which of the following would ensure that the breathing efficiency of a pair of intake valves on one diesel engine cylinder was identical?
Which of the following components would be associated with a variable geometry turbocharger?
Which of the following is often an indication of a boost side, turbocharger air leak?
When a rain cap is used on a vertical exhaust stack, in which direction should the opening flap be pointed?
When the unison ring in a variable nozzle (VN) type turbocharger is moved, which of the following changes?
Which sound dampening principle is based on sound waves being reflected back towards their source?
Where would you most likely find a thermocouple pyrometers on a current highway diesel engine?
Which of the following would be a typical operating temperature of a diesel engine oxidizing converter?
Which of the following best describes the role of an exhaust gas recirculation (EGR) system on a current diesel engine?
Which type of valve configuration is more likely to be used with quiescent combustion technology?
What term do DDC use to describe their compound turbocharger on DD-series engines?
When an engine brake is actuated as part of cruise control management, what is the term sometimes used to describe the cruise control system?
Which of the following can be used by the driver to control the cycling of a typical internal engine compression brake?
In a typical electronically controlled diesel engine, what force is used to time the hydraulic opening of the exhaust valves in an internal compression type brake?
For a truck driver to actuate a typical internal engine compression brake, all of the following switches would have to be closed EXCEPT:
When an engine brake is actuated on a current truck diesel engine, what is the maximum fueling permitted?
When 100% engine braking is required of a Cummins Intebrake on a pre-2010 ISX engine, how many solenoids must be energized?
Tech A says that an advantage of Cummins In the brake on a pre- 2010 ISX engine is progressive retarding that options engine braking from one through all 6 engine cylinders. Tech B says that on this engine, Intebrake effects braking using both of its overhead camshaft. Who is correct?
Which of the following is NOT an advantage of a Mercedes-Benz constant throttle valve (CTV) type engine brake?
From where does cylinder gas blowdown occur during a CVT braking cycle?
Tech A says that most current engine brakes use the ECM to manage braking cycles. Tech B says that modern engine brakes can perform the majority of the braking requirements of a transport truck. Who is correct?