Plasti-gage is used to measure:
Upon inspecting liner counterbores a technician finds that the bore seat is rough and pitted. The correct procedure is to:
A liner with excessive pitting on the outside liner surface, opposite the major thrust area would be an indication of:
Technician A says that liner protrusion is measured with the liner clamped down in the block. Technician B says that liner protrusion may be calculated by subtracting the depth of the counterbore from the liner flange thickness. Who is correct?
Which instrument(s) should be used to measure the liner counter bore depth?
Which instrument(s) should be used to measure the camshaft bores?
A semi-floating wrist pin is one that:
Technician A says that crosshatch pattern is controlled by the speed of the stroke and the RPM of the hone. Technician B says that deglazing of a cylinder will remove its taper. Who is correct?
When checking bearing clearances, plastigage becomes _________ as the clearance decreases.
Installation of a non-drilled lower main bearing shell in an upper main bearing bore will cause:
A technician finds a badly worn main bearing in the center position, all other bearings appear to be in progressively better shape toward each end. The most likely cause of this would be:
Witness marks on piston rings indicate:
A preliminary inspection of engine parts should be done at the time of engine:
After properly torquing the connecting rod bolts, what step can be taken to ensure the rod bearing has been installed correctly and the tangs are properly nested.
After removing an engine''s main bearing, a technician finds that the back of the bearing insert is shiny and has etch marks on it and the inside of the main bearing bore is also shiny and has etch marks. The probable cause for this would be:
Upon inspection of a bonded type vibration damper a technician finds that the index marks do not line up. The proper procedure is to:
Piston ring groove wear accelerates when the cylinder walls are:
A technician finds signs of seizure on one piston when performing an engine overhaul. What would the most likely cause be?
Parent engines are those that have:
What is being calculated by the following formula: displacement volume + clearnace volume/clearance volume
When the total of the cylinder volume at BDC is measured, we are referring to
The last check(s) after installing liners into the block is to check for:
New cam bushings should be installed with the use of the correct cam bushing driver and with the use of:
After installing new cam bushings you should check for:
The term "line boring" refers to:
Liner "O" rings should be coated with ___________________ prior to installation
Cylinder taper refers to:
When a new bearing shell is placed into a rod bearing cap, but being wider than the bore, it must be pressed down into place. This is called bearing ______________.
The template or torque and turm method of tightening bolts refers to torquing the bolts:
Prior to removing connecting rods and pistons you should:
Crankshafts and camshafts should be stored:
When measuring a cylinder bore, you find that it is larger at the top end of the ring travel area than at the lower end of the ring travel area. This difference is known as:
When a machine shop is grinding a crankshaft, sharply radiused fillets should be avoided between the cheek and journal to prevent:
Referring to engines and their babbit bearings, premature bearing failures are more often traced back to:
Due to rough counterbore seats, a technician finds it necessary to recut the counterbores. To compensate for the material removed from the seat, the technician must use:
Too little liner protrusion will often cause:
When installing cam bushings care must be taken to make sure that you:
When removing connecting rods and pistons, damage to the __________________may occur if the cap bolt threads are not covered.
When measuring a cylinder for wear you should check for
When honing cylinder sleeves you should:
When measuring bearing clearance with plastigage:
An undersized connecting rod bearing is one that has a:
A technician removes a cylinder ridge to:
The purpose of the chamfer at the top edge of the lower bore on an engine block using wet cylinder sleeves is to:
A rolled or twisted o ring on a liner may result in ______________________when installed.
A piston assembly consisting of a separate crown, skirt, slipper bushing, pin, and pin seal expansion plugs would be known as a _______________ piston.
Dye penetrants and sprays developer are used to:
If a dry sleeve goes in too tight the result will be:
Gallery plugs and frost plugs should be instaled:
After honing a cylinder, the crosshatch pattern should be approximately ______________degrees (included angle)
After carefully cleaning a counterbore in a cylinder block you should measure it in______________location(s)
An improperly installed cam bushing may result in:
Reducing the size of the main bearing caps and recutting the caps and block in a straight line is known as:
Upon inspection a technician finds that the deck on the top of the block is warped by .004" (maximum spec. is .008") The block should be:
A minimum measurement of a crankshaft journal is specified to be 3.4960. This specification is to be read to the_____________ of an inch.
A cylinder liner with a permissible amount of taper has had the ridge removed and has been deglazed. At which location in the bore do most manufacturers recommend that the new ring''s end gap be checked?
When measuring cam ground pistons for normal eccentricity, which location would have the smaller measurement?
Excessive ring groove wear on a piston may cause:
Excessive pin and guide hole wear on crossheads (valve bridges) would be an indication that the:
In the figure below, what is being performed?
While observing the tool shown below, Technician A says that it is used to straighten the connecting rod bend. Technician B says that it is used to measure connecting rod twists and bends. Who is right?'
Removing press-fit piston pins is being discussed. Technician A says the pin can be driven out with a hammer while securing the securing piston in a vise. Technician B says removing the pin requires a press and special adapters. Who is right?
The volume into which air is compressed in a cylinder in an engine is know as:
The term used to describe the heat generated through the cast iron block of an engine is known as:
What engine performance measurement is found by using the following formula: TORQUE x RPM = 5252
The difference in torque at governed RPM full load, and torque expressed as a percentage of torque at governed RPM, full load, is know as:
The lbs. of fuel per brake horsepower per hour that an engine uses is known as:
The most common type of combustion chamber used in diesel engines today is the:
During construction, crankshaft rod bearing journals are:
Exhaust valve temperatures may reach
As an engine crankshaft rotates, the lubricating oil between the bearing and the cranksahaft is drawn into the high stress or pressure area. The term used to describe this process is sometimes known as:
An engine bearing must be designed so that it is soft enough to absorb minute particles of foreign materials. This feature is known as
An engine crankshaft bearing is designed to be slightly larger in circumference than its bore so that when it is assembled it will fit tightly in its bore to improve heat transfer and prevent movement. This feature is known as
Valve overlap occurs between which of the following strokes?
At 2000 RPM each valve in a four stroke engine opens and closes how many times in five minutes?
Whenever a piston fires, especially when under full power there is a twisting of the crankshaft. To smooth out these power impulses and prevent crankshaft breakage from this twisting a ____________________ is used.
In the adjacent illustration, the rocker/pushrod design would mean that the valve would travel:
Technician A says that the parting line chamfer on an engine bearing is to provide space for any swelling in the area because of the bearing crush. Technician B says that most engine bearings are made with a steel backing, copper overlay and a babbitt coating. Who is correct?
In the adjacent illustrations, the arrow points to a ______________________type piston
The compression pressure usually found in a diesel engine is:
The figure below shows a sequence of numbers. these numbers are used for what purpose?
The bore of an engine refers to its:
What causes combustion air to enter a four stroke cycle, naturally aspirated diesel engine?
Oil flow in the crankshaft flows from the:
A crankshaft''s throw:
he ratio of the amount of charge actually taken in per engine cycle to a complete charge is known as:
When assembling an engine, liner protrussion is very important, too little protrussion may cause:
Upon inspection of a disassembled engine a technician finds one badly scored liner and piston. All the other liners and pistons appear to be in good shape. The first place to check would be:
Upon inspection a technician finds one out of the seven main bearing shell sets badly scratched. The most likely cause of this is:
Technician A says that a nick on any of the crankshaft journals that can be caught with a fingernail has to be serviced. Technician B says that crankshafts can be checked for cracks magnetically by using magnetic particle inspection. Who is right?
A bent connecting rod may cause collateral damage to all of these EXCEPT;
The tools in the picture below would be used for what purpose?
When measuring the piston ring gap:
Technician A says that vibration damper counterbalances the back-and-forth twisting motion of the crankshaft each time a cylinder fires. Technician B says if the seal contact area on the vibraion damper hub is scored, the damper assembly must be replaced. Who is right?
To improve combustion in the cylinders, all diesel engines use:
The purpose of removing air box covers on a Detroit Diesel engine is to:
The purpose of removing air box covers on a Detroit Diesel engine is to:
In a diesel fueled engine, when the fuel is burned, approximately how much of the heat energy generated by the fuel will be used to produce usable power?'
Technician A says that it is more cost effective to rebuild an oil pump than to buy a new one. Technician A says that it is a good practice to replace an oil pump when rebuilding an engine. Who is right?
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