Engine Repair Final

In an HCCI engine, combustion immediately and simultaneously produces a steady flame across the mixture. a. True b. False

b. False

Which of the following is not a true statement about thermostats? a. Faulty thermostats are often the cause of air pockets in the coolant passages. b. They can also cause an increase in fuel consumption and poor engine performance. c. If the thermostat is stuck open, the coolant may not reach the desired temperature because it is cooled before it gets hot. d. If a thermostat is stuck closed, coolant will not flow between the engine and radiator and the engine will quickly overheat.

a. Faulty thermostats are often the cause of air pockets in the coolant passages.

What is the best way to lift a vehicle when preparing to remove an engine? a. Frame contact hoist b. Drive on lift c. Hydraulic jack and safety stands d. Engine hoist

a. Frame contact hoist

What type of valve lifter automatically compensates for the effects of engine temperature? a. Hydraulic b. Solid c. Roller d. All of the above

a. Hydraulic

Which of the following does not contribute to oil sludge problems? a. Richer fuel mixtures b. Lower viscosity oils c. Longer oil change intervals d. Increased operating temperatures

a. Richer fuel mixtures

All of the following are common piston ring construction materials except: a. Steel b. Cast iron c. Molybdenum d. Chrome

a. Steel

A vehicle is producing a sharp, metallic rapping sound originating in the upper portion of the engine. It is most noticeable during idle. Technician A diagnoses the problem as piston pin knock. Technician B says that the problem is most likely a loose crankshaft thrust bearing. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

a. Technician A

Technician A says anaerobic sealers are often used on threads where fluid contact occurs. Technician B says anaerobic sealers are used in place of gaskets. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A or B

a. Technician A

Technician A says camshaft bearings can be either full-round or split bearings. Technician B says most crankshaft bearings are the full-round type. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A or B

a. Technician A

Technician A says in a series hybrid, the electric motor drives the wheels. Technician B says in a series hybrid, the wheels are driven by the internal combustion engine only. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A or B

a. Technician A

Technician A says that aluminum expands at a different rate than cast iron. Technician B says that cast iron has a coefficient of thermal expansion two or three times greater than aluminum. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

a. Technician A

Technician A says to cylinder heads often crack between the valve seats and around the spark plug holes. Technician B says cracks often appear around the intake ports. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

a. Technician A

Technician A uses adhesives to hold gaskets in place while installing them. Technician B uses RTV sealant on all surfaces that are prone to leaks. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

a. Technician A

Vacuum gauge readings are being discussed. Technician A says a low but steady vacuum reading indicates a timing problem. Technician B says a low but steady reading indicates a restricted exhaust system. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A or B

a. Technician A

While checking for conditions that might cause coolant electrolysis: Technician A places the positive lead of a voltmeter into the coolant and connects the negative lead to a ground. Technician B checks for the presence of voltage in the coolant with the ignition off. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

a. Technician A

While determining the cause for air leaking out of the oil throttle body during a cylinder leakage test: Technician A says that a burnt intake valve is indicated. Technician B says that a warped cylinder head or bad head gasket is indicated. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

a. Technician A

While determining the most likely problem of an engine with poor compression test results but acceptable cylinder leakage readings: Technician A says that the problem may be incorrect valve timing. Technician B says that the problem is worn valve seats. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

a. Technician A

While discussing cleaning engine parts: Technician A says that the cleaning method used depends on the component to be cleaned and the type of cleaning equipment available. Technician B says a parts tumbler is good for cleaning aluminum components such as intake manifolds and cylinder heads. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

a. Technician A

While discussing the causes of low engine oil pressure: Technician A says that contaminated and old engine oil could be the cause. Technician B says that a stuck pressure relief valve could be the cause. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

a. Technician A

While performing a cooling system service on a hybrid vehicle: Technician A says it may be necessary to connect a scan tool to the vehicle. Technician B says it may be necessary to disable the high-voltage system before servicing the engine. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

a. Technician A

Camshaft straightness is checked using V-blocks and a feeler gauge. a. True b. False

b. False

While removing a cylinder head: Technician A keeps all rocker arms and pushrods in order. Technician B loosens each head bolt, starting with the center bolts and moving toward the ends. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

a. Technician A

Fiat's MultiAir system relies on mechanical, hydraulic, and electronic technologies. a. True b. False

a. True

Make sure you locate and adhere to the "wet" torque specs when tightening a bolt that has been lubricated with oil or any other liquid. a. True b. False

a. True

Many engines in FWD vehicles must be removed with the transmission still attached. a. True b. False

a. True

Some crankshaft and camshaft timing sensors have a specified gap that must be set during installation. a. True b. False

a. True

The computer in most late-model vehicles must undergo a relearn or initialization procedure after the vehicle's battery has been disconnected and reconnected. a. True b. False

a. True

Valve lash is adjusted in many different ways; however, on many OHC engines, the clearance is set by re-placing a shim. a. True b. False

a. True

Which cleaning method uses high-frequency sound waves to create microscopic bubbles that loosen dirt from parts? a. Ultrasonic b. Salt bath c. Thermal d. Caustic

a. Ultrasonic

Which of the following statements about VVT are correct? a. VVT systems can be hydraulically and electrically controlled b. VVT cannot be used with variable valve lift c. VVT must be used on both the intake and exhaust valves d. All of these statements are correct

a. VVT systems can be hydraulically and electrically controlled

Which of the following types of cleaners would not be used on petroleum-based soils? a. Water-soluble cleaners b. Solvent tank cleaners c. Hot spray tanks d. Thermal cleaning ovens

a. Water soluble cleaners

An engine block should be mounted to an engine stand using a minimum of ___ bolts. a. four b. six c. three d. five

a. four

For every pound of pressure put on engine coolant, the boiling point of the coolant is raised about ___. a. 2°F (1.1°C) b. 3°F (1.6°C) c. 4°F (2.2°C) d. 5°F (2.7°C)

b. 3°F (1.6°C)

Which of the following statements is not true about thermal cleaning? a. The main advantage of thermal cleaning is a total reduction of all oils and grease on and in blocks, heads, and other parts. b. After a part has been thermally cleaned, it should be submerged in water to cool it quickly. c. Thermal cleaning leaves behind a dry, powdery ash on the parts. d. After a part has been thermally cleaned, it should be washed or blasted with shot.

b. After a part has been thermally cleaned, it should be submerged in water to cool it quickly.

Most cylinder head cracks occur where? a. Along the valve guide b. Around the seats c. Between the ports d. Along the head bolt holes

b. Around the seats

What device in the valve train changes rotary motion into reciprocating motion? a. Eccentric b. Cam c. Bushing d. Mandrel

b. Cam

All of the following statements about compression ratio or correct except: a. Increased compression ratios require high-octane fuel b. Carbon deposits decrease compression ratio c. Compression ratio is based on piston stroke d. Increasing compression ratio can increase power output

b. Carbon deposits decrease compression ratio

Which of the following is not a common engine construction material? a. Aluminum b. Carbon fiber c. Cast iron d. Magnesium

b. Carbon fiber

Which stroke in the four-stroke cycle begins as the piston reaches BDC after combustion takes place? a. Power stroke b. Exhaust stroke c. Intake stroke d. Compression stroke

b. Exhaust stroke

Oil pressure is determined by whether the pump is a gear type or rotor type and by oil clearances, the pump's pressure regulator valve, and oil viscosity. a. True b. False

b. False

On many FWD vehicles, the suspension system must be partially disassembled to remove the radiator. a. True b. False

b. False

SAE mandates that engine, when viewed from the front, will be rotating in a counterclockwise direction. a. True b. False

b. False

The camshaft is always located in the engine block. a. True b. False

b. False

The first step in removing an engine is usually the removal of the intake and exhaust manifolds. a. True b. False

b. False

The presence of air in the cooling system indicates the head gasket is faulty. a. True b. False

b. False

To eliminate the drain of engine power during times when cooling fan operation is not needed, many of today's belt-driven fans have a fan clutch that prevents the operation of the fan when the engine and radiator are heated up. a. True b. False

b. False

All of the following are advantages of diesel engines except: a. Diesel engines use less fuel than gasoline engines b. Improved cold-weather starting capability c. Increased durability compared to gasoline engines d. Increased combustion efficiency

b. Improved cold weather starting capability

A thermostat that is stuck open will cause which of the following? a. Engine overheating b. Increased exhaust emissions c. Air to enter the cooling system d. Cooling system scale buildup

b. Increased exhaust emissions

A late model FWD vehicle overheats only during stop and go traffic. Which of the following is the most likely cause? a. Defective thermostat b. Inoperative cooling fan c. Partially restricted radiator d. Low coolant level

b. Inoperative cooling fan

Which of the following statements is incorrect? a. Cylinder head bolts must be tightened to the proper amount of torque. b. Most cylinder head bolts are tightened in a sequence that starts on one end. c. On some engines, the head bolts are retorqued after the engine has been run and is hot. d. Many engines use head bolts of different lengths.

b. Most cylinder head bolts are tightened in a sequence that starts on one end.

Which of the following is not a type of valve guide seal? a. Positive b. Negative c. Umbrella d. O-ring

b. Negative

The surface finish of the cylinder acts as a ________ for the rings. a. Contact point b. Oil reservoir c. Water barrier d. All of the above

b. Oil reservoir

Which of the following statements about engines is not true? a. The engine provides the rotating power to drive the wheels through the transmission and driving axle. b. Only gasoline engines are classified as internal combustion. c. The combustion chamber is the space between the top of the piston and the cylinder head. d. For the combustion in the cylinder to take place completely and efficiently, air and fuel must be combined in the right proportions.

b. Only gasoline engines are classified as internal combustion.

What material is typically not used to form a rear main bearing oil seal? a. Polyacrylate b. RTV c. Viton d. None of these

b. RTV

Which of the following is not a high-efficiency low-emission engine design? a. Stratified charge engines b. Rotary engines c. Homogenous charge engines d. Variable compression engines

b. Rotary engines

Which of the following is not considered part of the organic soil grouping? a. Petroleum by-products derived from crude oil, including tar, road oil, engine oil, gasoline, diesel fuel, grease, and engine oil additives b. Rust that is a product of coolant and aluminum c. By-products of combustion, including carbon, varnish, gum, and sludge d. Coatings, including such items as rustproofing materials, gasket sealers and cements, paints, waxes, and sound-deadener coatings

b. Rust that is a product of coolant and aluminum

An engine bolt is removed and is found to be stretched. Technician A says the bolt can be reused. Technician B says some engine bolts are made to stretch when torqued. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A or B

b. Technician B

An engine overheats in traffic but is fine when driving: Technician A says a faulty thermostat may be the cause. Technician B says the fan clutch could be the cause. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

b. Technician B

Excessive camshaft and lifter wear is being discusses. Technician A says inadequate valve spring pressure could be the cause. Technician B says improper lubrication could be the cause. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A or B

b. Technician B

Technician A says installing a high-volume oil pump can supply more oil at greater pressures than a standard pump. Technician B says a high-volume pump will have larger gears than a standard oil pump. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A or B

b. Technician B

Technician A says most engines rotate in the clockwise direction. Technician B says most engines rotate in the counterclockwise direction. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A or B

b. Technician B

Technician A says most of the heat transfer from the valve to the cylinder head occurs along the valve stem. Technician B says most of the heat transfer is from the valve face to valve seat. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A or B

b. Technician B

Technician A says that TTY bolts can be used after they were removed if there are no signs of distortion or stretching. Technician B says that head bolts that pass through a coolant passage should be coated with a nonhardening sealer prior to installing them. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

b. Technician B

Technician A says that excessive engine-oil consumption can be caused by low oil levels. Technician B says that excessive oil consumption can be caused by worn valve guides. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

b. Technician B

Technician A says the oil pump in a dry sump system is located in the oil pan. Technician B says a dry sump system may use two pumps. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A or B

b. Technician B

Technician A says valve duration is the total amount of camshaft degrees the valve is open. Technician B says intake and exhaust valves are often open for the same amount of time. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A or B

b. Technician B

Technician A says when removing an engine, the A/C system must be discharged. Technician B says on some vehicles, the A/C compressor can be unbolted and moved aside so the system can remain charged. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A or B

b. Technician B

While checking a hydraulic phaser after the camshaft has been removed from the engine: Technician A at-tempts to rotate the phaser's timing gear by hand and replaces it if it does not move. Technician B applies air pressure to the advance and retard ports and replaces it if the gear does not move. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

b. Technician B

While conducting an engine vacuum test: Technician A says that a steady low vacuum reading can be caused by a burned intake valve. Technician B says that an overall low vacuum reading is caused by something that affects all of the engine's cylinders. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

b. Technician B

While diagnosing the cause for an engine having good results from a compression test and cylinder leakage test but poor results from a cylinder power balance test: Technician A says that incorrect valve timing is the most likely cause. Technician B says that a severely worn cam lobe is a likely cause. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

b. Technician B

While discussing piston slap: Technician A says that it is a high-pitched clicking that becomes louder during deceleration caused by detonation. Technician B says that it is the noise made by the piston when it contacts the cylinder wall due to excessive clearances. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

b. Technician B

While discussing the reasons for resurfacing a cylinder head: Technician A says it should be resurfaced to make it flat and very smooth so that the head gasket can seal properly during engine assembly. Technician B says that it can be resurfaced to raise the compression. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

b. Technician B

While installing a timing belt: Technician A installs the belt, turns the crankshaft two full rotations, then applies tension to the belt. Technician B installs the belt, applies tension, then turns the crankshaft two full rotations. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

b. Technician B

Why is cylinder ridge reaming performed? a. To aid piston installation b. To prevent piston damage when removing c. To correct cylinder taper wear d. To apply the correct surface finish to the cylinder

b. To prevent piston damage when removing

Which of the following is not a common way to identify the location of cracks in the engine block or cylinder head? a. Pressure checks b. Vacuum test c. Magnetic particle inspection d. Penetrant dye

b. Vacuum test

Bent pushrods are found when inspecting the valvetrain of a late model V6 engine. Which of the following is the most likely cause? a. Worn valve guides b. Worn timing chain c. Incorrect rocker arm torque d. Incorrect valve springs

b. Worn timing chain

The buildup of minerals and deposits inside the cooling system is called ___. a. organic soil b. scale c. rust d. grime

b. scale

The stroke of an engine is the ___ crank throw. a. half b. twice c. four times d. equal to

b. twice

An engine where the valves can contact the pistons is called: a. A freewheeling engine b. An overhead-cam engine c. An interference engine d. An Atkinson engine

c. An interference engine

Maximum cylinder wear occurs: a. In the middle of the cylinder b. At the bottom of the cylinder c. At the top of the cylinder d. Cylinder wear is the same at all points

c. At the top of the cylinder

After removing the vehicle's hood in preparation for removing the engine: Technician A places the hood on the roof of the vehicle. Technician B sets the hood aside in a safe place on fender covers or cardboard. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

c. Both A and B

Before reusing head or other critical bolts: Technician A measures their length and compares the measurement to specifications. Technician B lubricates the threads and the bottom of the bolt head with engine oil before installing them. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

c. Both A and B

Technician A labels or marks all electrical wires before disconnecting them. Technician B labels or marks all vacuum hoses and verifies the connections to the underhood decal before disconnecting them. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

c. Both A and B

Technician A says an engine may use one or more valve springs per valve. Technician B says additional valve springs are used to control vibration and increase total pressure. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

c. Both A and B

Technician A says engines can be classified by their number of operating cycles. Technician B says engines are classified by the type of valvetrain used. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A or B

c. Both A and B

Technician A says head gasket thickness has an effect on compression ratio. Technician B says connecting rod length has an effect on compression ratio. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

c. Both A and B

Technician A says rocker arms can increase valve lift. Technician B says some engines do not use rocker arms. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A or B

c. Both A and B

Technician A says that if the PCV valve or connecting hoses become clogged, excessive pressure will develop in the crankcase and can cause oil leaks. Technician B says that if the PCV valve or connecting hoses become clogged, oil may be pushed into the air cleaner or cause it to be drawn into the intake manifold. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

c. Both A and B

Technician A says that positive valve stem seals fit tightly around the top of the valve guide. Technician B says that positive stem seals scrape oil off the valve as it moves up and down. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

c. Both A and B

Technician A says the Atkinson cycle reduces displacement and compression. Technician B says the Atkinson cycle shortens the compression stroke. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A or B

c. Both A and B

Technician A says the harmonic balancer is used to absorb engine crankshaft vibrations. Technician B says the harmonic balancer helps keep the crankshaft from breaking under stress. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A or B

c. Both A and B

Technician A uses a crane to remove an engine from its compartment. Technician B uses an engine cradle to remove an engine from its compartment. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

c. Both A and B

Technician A uses soft gaskets on valve covers. Technician B uses soft gaskets on water pumps. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

c. Both A and B

When discussing oil consumption: Technician A says using one-quart of oil every 2,000 miles is acceptable. Technician B says oil consumption may increase depending on driving conditions. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

c. Both A and B

While bleeding air from a cooling system: Technician A loosens a heater hose at its highest point. Technician B uses air bleed valves. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

c. Both A and B

While diagnosing an engine that overheats after frequent hard accelerations: Technician A checks for a collapsed lower radiator hose. Technician B checks the cooling fan electrical circuit. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

c. Both A and B

While diagnosing the cause of air bubbles in the coolant recovery tank: Technician A checks for a bad head gasket. Technician B checks the radiator cap. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

c. Both A and B

While discussing the Valvetronic system: Technician A says the system has no need for a throttle plate. Technician B says the system alters the lift of the intake valves. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

c. Both A and B

While discussing the common causes for cracks developing in a cylinder block or head: Technician A says that the chilling of a hot engine by a sudden rush of cold water or air over the surface may cause cracking. Technician B says that excessive overheating is a common cause. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

c. Both A and B

While inspecting the timing gears of an engine: Technician A says a gear with cracks, spalling, or excessive wear on the tooth surface indicates improper gear backlash. Technician B says the diameter of many of the engine's timing gears and sprockets should be measured with the drive chain wrapped around the individual gears. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

c. Both A and B

While looking at the results of an oil pressure test: Technician A says that higher than normal readings can be caused by using an incorrect viscosity oil. Technician B says that higher than normal readings can be expected on a cold engine. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

c. Both A and B

While loosening the axle shaft hub nuts on a FWD vehicle: Technician A says that a large breaker bar should be used to prevent damage to the bearings. Technician B says that these nuts should be loosened with the vehicle on the floor and the brakes applied. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

c. Both A and B

While servicing a pair of aluminum cylinder heads: Technician A says if needed, both heads must be machined equally and the same amount of material removed from each. Technician B replaces both heads if the warpage exceeds the specified allowable amount. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

c. Both A and B

While tightening a TTY bolt: Technician A initially tightens the bolt to the specified torque. Technician B turns the bolt an additional amount after the bolt has been tightened to the specified torque. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

c. Both A and B

While working on an engine with an excessive amount of sludge buildup: Technician A says that the presence of sludge is a signal to look for wear on other components. Technician B says that excessive buildup can indicate a poor maintenance schedule. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

c. Both A and B

Which test can be used to diagnose a head gasket leak? a. Cylinder power balance test b. Running compression test c. Cylinder leakage test d. Vacuum test

c. Cylinder leakage test

All of the following statements about valve overlap are correct except: a. Overlap affects efficiency and exhaust emissions b. Increased overlap reduces cylinder pressure c. Decreased overlap decreases low RPM torque d. Overlap helps charge the cylinder

c. Decreased overlap decreases low RPM torque

Which of the following procedures is performed on a cylinder within acceptable wear limits? a. Boring b. Honing c. Deglazing d. All of the above

c. Deglazing

Plastigage is used to: a. Determine cylinder head flatness b. Determine oil pump gear clearance c. Determine bearing oil clearance d. Timing gear backlash

c. Determine bearing oil clearance

Which of the following is not a true statement about diesel engines? a. The operation and main components of a diesel engine are comparable to those of a gasoline engine. b. Diesel and gasoline engines are available as four-stroke combustion cycle engines. c. Diesel engines rely on glow plugs instead of spark plugs to initiate ignition. d. The compression ratio of diesel engines is typically three times that of a gasoline engine.

c. Diesel engines rely on glow plugs instead of spark plugs to initiate ignition.

A short block typically includes all of the following components except: a. Crankshaft b. Connecting rods c. Flywheel d. Core plugs

c. Flywheel

Which is not a typical method of driving the water pump? a. Accessory drive belt b. Electric motor c. Hydraulic motor d. Timing belt

c. Hydraulic motor

Pressurizing the cooling system provides: a. Faster coolant flow b. Better heat dissipation c. Increased boiling temperature d. Lower freeze protection

c. Increased boiling temperature

Which of the following is not true of knurling? a. It is one of the fastest techniques for restoring the ID dimensions of a worn valve guide. b. It reduces the amount of work necessary to reseat the valve. c. It is useful for restoring badly worn guides to their original condition. d. None of the above

c. It is useful for restoring badly worn guides to their original condition.

All of the following statements about cylinder heads are correct except: a. Larger valves require stronger valve springs b. All multivalve heads are of crossflow construction c. Large valves increase low RPM torque compared to smaller valves d. Two valve designs will float the valves sooner than four valve designs

c. Large valves increase low RPM torque compared to smaller valves

Many engines with VVT have a phaser mounted to the end of one or more camshafts. Which of the following statements is not true? a. A phaser is used to alter valve timing. b. Most phasers are controlled by oil pressure. c. Phasers are used to change valve lift. d. Phasers can be used to change valve overlap.

c. Phasers are used to change valve lift.

Which of the following is not a typical gasket material? a. Cork b. Steel c. Rubber d. Paper

c. Rubber

Which of the following statements about preparing to assemble an engine is not true? a. Discard and replace all bolts that are damaged. b. Identify what bolts go into the specific bores. c. Use a thread locker on all bolts. d. Clean bolt and cylinder block threads with a thread chaser or tap.

c. Use a thread locker on all bolts.

Which of the following is not an effective way to determine if an engine has an internal coolant leak? a. Performing a pressure test on the system b. Visually inspecting the exhaust, coolant, and engine oil c. Using a dye penetrant and black light d. Using a combustion leak tester

c. Using a dye penetrant and black light

Hydrocarbon solvents are ___ . a. flammable b. toxic c. both A and B d. neither A nor B

c. both A and B

To allow the engine to run on the Atkinson cycle, Toyota's VVT-i system causes the ___. a. intake valve to open early b. exhaust valve to open late c. intake valve to close late d. exhaust valve to close early

c. intake valve to close late

How many degrees of crankshaft rotation are required to complete one complete combustion cycle? a. 180 b. 360 c. 540 d. 720

d. 720

Measuring cylinder deck warpage is performed using: a. A micrometer and straightedge b. A dial indicator and feeler gauge c. A dial caliper and machine ruler d. A straightedge and feeler gauge

d. A straightedge and feeler gauge

Modern vehicles use which of the following engine timing arrangements? a. Belts b. Chains c. Gear-to-gear d. All of the above

d. All of the above

Which of the following are considered soft, cut gaskets? a. Paper gaskets b. Cork gaskets c. Cork/rubber gaskets d. All of the above

d. All of the above

Which of the following is a function of the engine's lubrication system? a. Holds an adequate supply of oil b. Removes contaminants from the oil c. Delivers oil to all necessary areas of the engine d. All of the above

d. All of the above

Which of the following statements about the purpose of a cylinder head gasket is not true? a. It seals intake stroke vacuum, combustion pressure, and the heat of combustion. b. It prevents coolant leakage and resists rust, corrosion and, in many cases, meters coolant flow. c. It allows for lateral and vertical head movement as the engine heats and cools. d. It meters lubricating oil onto the engine's cylinder walls.

d. It meters lubricating oil onto the engine's cylinder walls.

All of the following can cause blue exhaust smoke except: a. Worn piston rings b. Deteriorated valve guide seals c. Incorrect PCV valve d. Knurled valve guides

d. Knurled valve guides

Technician A says it is not necessary to measure valve stem height unless the valves have been replaced. Technician B says valve stem height can be adjusted with shims. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

d. Neither A nor B

Technician A says that if an engine had good results from a compression test, it will have good results from a cylinder leakage test. Technician B says that if an engine had good results from a cylinder leakage test, it will have good results from a running compression test. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

d. Neither A nor B

Technician A says that oil pan gaskets are often made of cork due to its ability to conform to small imperfections in the oil pan. Technician B says oil pan and valve cover gaskets are often MLS gaskets to account for the different expansion rates between components. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

d. Neither A nor B

When a customer states that black exhaust smoke is coming from the exhaust: Technician A says faulty oil rings may be the cause. Technician B says a faulty head gasket may be the cause. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

d. Neither A nor B

While diagnosing the cause for blue smoke from the tailpipe of a gasoline engine: Technician A says that a faulty fuel injection system is a likely cause. Technician B says that it is most likely caused by coolant leaking into the combustion chamber. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

d. Neither A nor B

While discussing abrasive cleaners: Technician A says that shot is angular in shape and is used for aggressive cleaning. Technician B says that grit is an angular-shaped media and is used to peen metal surfaces. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

d. Neither A nor B

While discussing camshafts Technician A says valve lift is based only on the height of the cam lobe. Technician B says valve duration is based on the height of the lobe. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

d. Neither A nor B

While discussing proper engine break-in: Technician A says that the engine should run at idle speed for at least 2 hours. Technician B says that the engine should be accelerated from a stop at full throttle to 50 mph and that this cycle should be repeated at least ten times. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

d. Neither A nor B

While preparing to remove an engine: Technician A turns the crankshaft pulley to set the engine at number 1 cylinder TDC. Technician B removes the drive belt and crankshaft pulley. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

d. Neither A nor B

While selecting the proper RTV for a particular application: Technician A uses RTV in a black tube for all high-temperature applications. Technician B uses RTV in a red tube for most general applications. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

d. Neither A nor B

A four-cylinder late model engine has low cranking dry and wet compression readings on one cylinder. Technician A says a worn camshaft lobe could be the cause. Technician B says worn valve seats could be the cause. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A or B

d. Neither A or B

Technician A says RTV sealants can be used for all gasket applications. Technician B says RTV must be allowed to cure for 24 hours before it can be torqued. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A or B

d. Neither A or B

Technician A says all valve lifters are designed to rotate in their bore to reduce wear. Technician B says the camshaft lobes are specially ground to prevent lifter rotation. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A or B

d. Neither A or B

Technician A says cooling system electrolysis can be checked with a hydrometer. Technician B says low coolant level causes electrolysis. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A or B

d. Neither A or B

Which of the following is an expression of how much of the heat formed during the combustion process is available as power from the engine? a. Mechanical efficiency b. Engine efficiency c. Volumetric efficiency d. Thermal efficiency

d. Thermal efficiency

Which is the most likely cooling system hose to fail? a. Heater hose b. Bypass hose c. Lower radiator hose d. Upper radiator hose

d. Upper radiator hose

A valve stem and guide show signs of excessive wear. Which of the following is the most likely cause? a. Worn valve rotators b. Weak valve springs c. Leaking valve guide seal d. Valve spring not square

d. Valve spring not square

Which of the following statements is not true? a. When the engine is removed through the bottom of the vehicle, use an engine cradle and dolly to support the engine. b. If the manufacturer recommends engine removal through the hood opening, use an engine hoist. c. Regardless of the method of removal, the engine and transaxle in a FWD vehicle are usually removed as a unit. d. When removing an engine from a RWD vehicle, suspension disassembly is often required.

d. When removing an engine from a RWD vehicle, suspension disassembly is often required.

Cooling system hoses should be replaced when they are ___. a. hard (brittle) b. soft (spongy) c. swollen d. all of the above

d. all of the above

Multiple valve engines tend to be more efficient than two-valve-per-cylinder engines because they ___. a. allow for increased port areas b. have smaller valves c. provide less restriction to the airflow d. all of the above

d. all of the above

To ensure proper seating of the valve, the valve seat must be ___. a. the correct width b. in the correct location on the valve face c. concentric with the guide d. all of the above

d. all of the above

Parts must be ___ when they go into an abrasive blast machine. a. wet b. dry c. grease-free d. both b and c

d. both b and c

Graphite is ___. a. an anaerobic substance b. an RTV c. an aerobic substance d. none of these

d. none of these