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WorksheetsBasic Engine components
Total questions: 54
Worksheet time: 1hrs 3mins
Name
Class
Date
1.
What is this used for?
a)
Checking Screen Wash Level
b)
Checking Engine Oil Level
c)
Aeiral
d)
Brake Fluid Level
2.
Which color of smoke from the exhaust indicates an internal mechanical problem in the engine?
a)
Blue
b)
White
c)
Black
d)
All of the above
3.
Which of the following is NOT a stroke of a (four stroke) engine?
a)
Combustion
b)
Intake
c)
Exhaust
d)
power
4.
During the intake stroke, what valve or valves is/are open?
a)
Intake
b)
Compression
c)
Power
d)
Exhaust
5.
What part of the engine is this?
a)
Crankshaft
b)
Intake Valve
c)
Piston
d)
Camshaft
6.
What engine part is this?
a)
Piston
b)
Ring
c)
Connecting rod
d)
Valve
7.
If one valve is larger, it will be the ________ valve?
a)
Intake
b)
Compression
c)
Exhaust
d)
Power
8.
Which of the following is considered the foundation of the diesel engine and supports all of the other engine components?
a)
Crankshaft
b)
Cylinder Block
c)
Camshaft
d)
Cylinder Head
9.
Passages in the cylinder block that allow coolant to move around the outside of the cylinder and carry off the excess heat generated by combustion are called ________________.
a)
Wet Sleeves
b)
Plenums
c)
Water Jackets
d)
Galleries
10.
Grooves cut into the side surface of the piston are fitting with ________________ that seal in the compression and combustion pressure, and control the lubricating oil film on the wall of the cylinder liner.
a)
Gaskets
b)
O-Rings
c)
Oil Seals
d)
Piston Rings
11.
Which of the following connects the rod of the piston?
a)
Rod Cap
b)
Connecting Rod
c)
Piston Pin
d)
Rod Bolt
12.
The area formed by the oil pan and the bottom half of the cylinder block is called the
________________.
________________.
a)
Sump
b)
Head Group
c)
Damper
d)
Crankcase
13.
Which of the following extends into the sump and is covered by a coarse wire screen that prevents dirt and bits of metal from entering the lubrication system and damaging the engine?
a)
Vibration Damper
b)
Oil Pickup Tube
c)
Flywheel
d)
All of the above
14.
The action of opening and closing the valves is determined by the size and shape of the
________________.
________________.
a)
Intake Ports
b)
Cam Lobes
c)
Ring Gear
d)
Cylinder Head
15.
The ________________ converts the rotational motion of the cam lobe into a reciprocating motion in the valve train.
a)
Rocker Arm
b)
Push Rod
c)
Cam Follower
d)
Eccentric
16.
When the cylinder head is bolted to the block, a ________________ is installed between the head and block to maintain an airtight and watertight seal.
a)
Manifold
b)
Head Gasket
c)
Crossover
d)
Header
17.
When two valves are used for the same function in a cylinder, a ________________ is added to form a bridge between the valves.
a)
Manifold
b)
Duel Port
c)
Header
d)
Crosshead
18.
Which of the following distributes clean, filtered air to the intake ports of each cylinder on a four-cycle engine?
a)
Air Box
b)
Intake Manifold
c)
Turbocharger
d)
Exhaust Manifold
19.
A ________________ is a heat exchanger that is designed to cool intake air before it enters the combustion chamber.
a)
Plenum
b)
Manifold
c)
Charger Air Cooler
d)
Radiator
20.
Diesel engines are classified using ________________.
a)
Power Rating
b)
Speed Rating
c)
Cylinder Arrangement
d)
All of the above
21.
When air is compressed, it heats up. A diesel engine will perform better if the intake air is
________________ before it enters the combustion chamber.
________________ before it enters the combustion chamber.
a)
Heated
b)
Filtered
c)
Cooled
d)
Humidified
22.
During the ________________ stroke, both the intake and exhaust valves are closed while the piston moves upward in the cylinder.
a)
Intake
b)
Compression
c)
Power
d)
Exhaust
23.
If the intake valves open 12° before top dead center (BTDC) and the exhaust valves do not close until 12° after top dead center (ATDC), the valve overlap is ________________.
a)
0°
b)
6°
c)
12°
d)
24°
24.
A ________________ completes a full combustion cycle using only one revolution of the crankshaft.
a)
Three-Cylinder Engine
b)
Two-Stroke Cycle Engine
c)
Four-Stroke Engine
d)
Hybrid Engine
25.
In a ________________ engine, the cylinders are arranged in a circle around a common
crankshaft.
crankshaft.
a)
Radial
b)
Delta
c)
W-Type
d)
Sixteen-Cylinder
26.
The ________________ fuel injection system delivers fuel to the individual injectors via short high-pressure fuel lines.
a)
Pressure-Time
b)
Unit Injector
c)
Distributor Pump
d)
Common Rail
27.
A ________________ fuel injection system is sometimes called a rotary pump system.
a)
Distributor Pump
b)
Unit Injector
c)
Common Rail
d)
Pressure-Time
28.
The distance the piston travels between its top dead center and bottom dead center positions is called ________________.
a)
Displacement
b)
Stroke
c)
Bore
d)
Volume
29.
The volume that is displaced by the upward strokes of the engine’s pistons is called
________________.
________________.
a)
Pressure
b)
Cylinder Displacement
c)
Engine Displacement
d)
Volumetric Efficiency
30.
The amount of air that is actually pulled into a cylinder compared to the total volume that could theoretically fill the cylinder is known as ________________.
a)
Compression Ratio
b)
Cylinder Displacement
c)
Clearance Volume
d)
Volumetric Efficiency
31.
The difference between the compression pressure and the expansion pressure is known as the ________________.
a)
Horsepower
b)
Scavenge Efficiency
c)
Mean Effective Pressure
d)
Torque
32.
The rotational or twisting force around a fixed point is called ________________.
a)
Compression
b)
Brake Horsepower
c)
Pressure
d)
Torque
33.
A dry cylinder liner allows for the quickest possible dissipation of excess cylinder heat.
a)
True
b)
False
34.
The main bearing journals support the crankshaft as it turns in the cylinder block.
a)
True
b)
False
35.
Rod caps are interchangeable between connecting rods.
a)
True
b)
False
36.
An internal engine balancer is a counterweight that bolts to one side of the flywheel to cancel out vibrations from the crankshaft.
a)
True
b)
False
37.
The crankshaft coordinates operation of the intake and exhaust valves.
a)
True
b)
False
38.
Push tubes or push rods connect the cam followers to the rocker arms.
a)
True
b)
False
39.
In order to provide greater airflow through the cylinder, many engines are designed with
three or four valves per cylinder.
three or four valves per cylinder.
a)
True
b)
False
40.
A supercharger is driven by exhaust gases.
a)
True
b)
False
41.
Turbochargers allow a small diesel engine to produce up to 40% more power than the same size engine could generate if it were naturally aspirated.
a)
True
b)
False
42.
A four-stroke cycle engine requires four complete revolutions of the crankshaft to complete the four piston strokes that make up one combustion cycle.
a)
True
b)
False
43.
At the completion of the exhaust stroke, the piston will be at or near the bottom dead
center position.
center position.
a)
True
b)
False
44.
Valve overlap is measured in degrees of crankshaft rotation.
a)
True
b)
False
45.
Two-cycle diesel engines do not have intake valves.
a)
True
b)
False
46.
The common element in all indirect injection designs is the use of pintle-type injection
nozzles.
nozzles.
a)
True
b)
False
47.
Engine bore is measured in cubic inches.
a)
True
b)
False
48.
At sea level, atmospheric pressure is equal to 14.7 psi.
a)
True
b)
False
49.
While cylinder displacement does not change without altering either the bore or stroke,
clearance volume is controlled by cylinder head and piston design.
clearance volume is controlled by cylinder head and piston design.
a)
True
b)
False
50.
Mechanical efficiency is the difference between indicated horsepower and brake
horsepower.
horsepower.
a)
True
b)
False
51.
Indicated horsepower refers to the horsepower that the engine will produce at its maximum full-load, governed speed in a particular application.
a)
True
b)
False
52.
What is the primary purpose of a turbocharger in an engine?
a)
To increase fuel efficiency by reducing engine size
b)
To reduce emissions by controlling exhaust flow
c)
To increase engine power by forcing more air into the combustion chamber
d)
To cool the engine by circulating extra air
53.
What is the effect of a fouled spark plug on engine performance?
a)
It improves engine performance
b)
It has no effect
c)
It can cause the engine to run rough or misfire
d)
It increases the engine's horsepower
54.
1. Lorenzo suggests that the team use the same motors used on _____________________ to use on their ROV.
a)
Cars
b)
Boats
c)
Trucks
d)
Lawnmowers
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