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In typical gasoline-powered automobile engine, how many piston strokes make up a complete cycle?

Four

The length of a valve spring when removed from the engine is called the_____length.

Free

Distance measured from ring land to back of ring groove.

Ring groove depth.

Distance measured from top to bottom of ring groove.

Ring groove width.

_______is another name used to describe the engine bottom end.

Short block

Distance from bottom of skirt to centerline of pinhole.

Skirt length.

Which of the following methods is used to secure a full-floating piston pin in the piston?

Snap rings

Highest point of piston travel.

TDC

Time when both the intake and exhaust valves in the same cylinder are open.

Valve overlap

Valve opening and closing in relation to the position of the pistons in the cylinders.

Valve timing

A head with all its parts removed is called a(n)___________cylinder head.

bare

Any vehicle engine that is not an internal combustion, four-stroke cycle, reciprocating piston type is classified as a(n)_____engine.

alternative

The engine main______are removable inserts that fit between the crankshaft main journals and the block main bore.

bearing

The engine main_________are removable inserts that fit between the crankshaft main journals and the block main bore.

bearings

A(n)_________overhead cam engine has two camshafts per cylinder head.

dual

The piston is mounted to the connecting rod by the_______.

wrist pin

Hydraulic valve lifters operate quietly because they maintain_______valve clearance.

zero

Pistons typically use_____compression rings and one oil ring.

2

The______cycle engine requires only one revolution of the crankshaft for each power-producing cycle.

2-Stroke

Which of the following valve face angles is normally found in passenger car engines?

45

Lowest point of piston travel.

BDC.

While discussing engines, Technician A says two-stroke engines are not used in vehicles because they produce too much exhaust pollution. Technician B says two-stroke cycle engines are not used in vehicles because they have poor power output at low speeds. Who is right?

Both A and B.

Precision-machined and polished surfaces that control valve movement.

Cam lobes

How long the valve stays open.

Camshaft duration

Distance the valve opens.

Camshaft lift.

Which of the following is not a common way to classify engines?

Carburetor design

Distance from centerline of pinhole to top of piston.

Compression distance.

A(n)______changes the engine cylinders' up-and-down motion into a rotating motion.

Crankshaft

Removes burned gases from engine.

Exhaust stroke

Clears burned gases from cylinder.

Exhaust stroke.

A three-valve combustion chamber typically has one intake valve and two exhaust valves.

False

An intake valve is usually smaller than an exhaust valve.

False

In a four-stroke cycle engine, the crankshaft must make four complete rotations to complete the cycle.

False

Opening of the engine's valves is controlled by the crankshaft.

False

Rocker arms connect the camshaft to the push rods.

False

The crankcase is the upper part of the engine block, where the valves are located.

False

Two-stroke cycle engines are as fuel-efficient as four-stroke cycle engines.

False

Valve springs are used to open an engine's intake and exhaust valves.

False

Engine operation is smoothed by the large________ mounted on the rear of the crankshaft.

Fly wheel

Push rods transfer motion from the_______to the rocker arms.

Lifter

Which of the following is not a metal that is plated over a steel backing for use as an engine bearing?

Magnesium.

Which of the following is not part of an engine?

Muffler

A timing belt, gears, or a chain drives the engine's camshaft at________the rotation speed of the crankshaft.

One-half

Valve______is the time when both of the valves in a cylinder are open

Overlap

Distance measured across inside of hole for piston pin.

Pin hole diameter

The connecting rod small end is attached to the_______by a wrist pin.

Piston

Distance measured across sides of piston.

Piston diameter

Results in (180 rotation of crankshaft

Piston stroke.

Valves close off the intake and exhaust______for each engine cylinder.

Ports

Caused by ignition of air-fuel mixture

Power stroke.

The valve_______controls the opening and closing of the cylinder head ports.

Train

A crank damper helps prevent crankshaft vibration.

True

A valve guide that is part of the cylinder head casting is called an integral valve guide

True

An umbrella valve seal is shaped like a cup and keeps oil from being drawn into the cylinder head port and combustion chamber.

True

Each piston has two compression rings and one oil ring.

True

Mechanical (solid) valve lifters produce a clatter, or clicking noise, as the valves operate.

True

Slant engines and V-type engines allow lower hood lines than inline engines.

True

Stellite valves have a special hard coating to prolong their service life.

True

The combustion chamber is located directly above the piston.

True

The flywheel contains a small ring gear, which is used to start the engine.

True

To prevent carbon buildup on the valve face, a valve rotator is often used.

True

The opening of an engine's valves is controlled by the_________.

camshaft

_______rings prevent combustion pressure from leaking into the engine's crankcase.

compression

Squeezes trapped fuel mixture.

compression stroke

Draws air-fuel mixture into combustion chamber.

intake stroke

The______machined on the camshaft are used to open each valve as the engine operates.

lobes

An inline engine has______bank(s) of cylinders.

one

Produces energy to operate engine.

power stroke

A(n)______rod transmits motion from the lifters to the valve rocker arms.

push

The intake manifold on a fuel-injected engine contains passages called______to route the fuel mixture to each cylinder.

runners

The piston is mounted to the connecting rod by the_____.

wrist pin

What is the purpose of the compression rings used on pistons?

to hold Combustion Pressure in top of Piston

In a cam-in-block engine, the part of the valve train riding directly on the cam is the_______.

valve lifter


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