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WorksheetsAg Power Mid-term practice #2
Total questions: 100
Worksheet time: 50mins
What is this part
Carburetor
Ignition coil
Fuel pump
Oil pump
To verify that the ______ is working, the air cleaner assembly must be removed and the throat of the carburetor checked.
air pressure regulated
primer bulb
cooling system
anti-afterfire solenoid
The direction of heat transfer is always from a _____ temperature to a ______ temperature.
lower, higher
lower, lower
higher, lower
higher, higher
What is torque?
a rotating force
Pressure per square in
rotations per minute
a pulling force
The connecting rod connects what two engine parts together?
Piston and Camshaft
Piston and Crankcase
Piston and Flywheel
Piston and Crankshaft
Which of the following is a function of a small engine?
To change heat energy into mechanical energy
To change kinetic energy into potential energy
To change rotary motion into vertical motion
To change reciprocal motion into circular motion
What are the purpose of the cam lobes?
to prevent oil in the cylinder
to move the valves open and closed
decroative
to seal the air-fuel mixture during compression
What theory does the ignition armature rely on to work?
Induction Theory
Bernoulli's Principle
the Venturi Effect
Four Stroke Theory
What allows gas to come into the throat of the carburetor from the fuel bowl?
Bernoulli's Principle
the Venturi effect
Induction Theory
Four-Stroke Theory
What does the idle circuit do?
allows a little fuel/air mixture to bypass the throttle plate to maintain the engine
to mix the gas and air together
makes gas come up to the carburetor from the fuel bowl
Creates a vacuum in the combustion chamber
What are these
Valves
Fuel regulator
Carburetor
Rockers
If I was in a cold environment which , weight oil would I use in a small 4 stroke engine
5w30 synthetic
30w60 Non synthetic
10w30 non synthetic
25W30 synthetic
What is the number one shop safety rule?
Report all accidents to the instructor
Always wear safety glasses
No horseplaying
Know where the fire extinguishers are located
What are the three sections of the Model number?
Model, Type, Code
Serial number, sales number, date
Make, Model, Decal
the model number has just one part
Where is the most common spot to find the model number on small engines?
on the valve head cover
on the flywheel
on the crankcase base
on the fuel tank
Why do valves rotate as they open and close?
to clean off the carbon build up
to provide extra torque to the engine
to assist in bringing in fresh air
the springs naturally do this
What danger does running an engine inside the shop present that requires students to open a window?
Carbon monoxide poisoning
bruising from a falling engine
a gas explosion
slipping on an oil spill
A narrower spot in the carburetor throat that increases the speed at which a the air/gas mixture travels uses __________?
the Venturi effect
Bernoulli's Principal
Induction Theory
Four-stroke engine theory
What does the governor control?
the rpms of an engine (tries to make them constant)
the choke (controls the air going into the carburetor)
The electrical current going to the spark plug
the amount of oil in the crankcase
What are the two systems for cooling an engine?
Liquid and air cooling systems
jet propulsion and injection systems
oil and vinegar cooling systems
chemical and physical systems
What is the adjustment made on the governor of small engines?
the static governor adjustment
the idle circuit screw
the ignition amateur air gap adjustment
the valve clearance adjustment
Why is gasoline not really the best fuel?
It has a low octane and high knocking index rating
it is cut with ethanol and lead
It has a high octane and low knocking index rating
it doesn't combust unless a lot of pressure is applied
Which engine type requires oil to be mixed into gas
Single cylinder
Two stroke engines
Four Stroke Engines
Auto engines
Using old gas can prevent your engine from starting. How new should gas be?
Less than 1 month old
Less than 6 month old
Less than 1 year old
Less than 6 years old
There is no oil filter on a four stroke engine so tiny particles circulate with oil. How often should the oil be changed?
every year
every 5 hours of engine operation
every 25 hours of engine operation
every 40 hours of engine operation
Why does the flywheel have to be so heavy?
It helps provide inertia to keep the engine going
engines are sold by the pound
it helps slow the engine to a stop
magnets are heavy and the flywheel has 1 or more
Why do we have a choke on our engines before we start them?
Engines need a little more gas than air to get started, once starting you can increase air
Engines need a lot of air to get started
to ensure we flood the engine every time
To mix up the gas and oil
Does the spark plug fire with each rotation of the crankshaft?
yes
no
No answer text provided.
No answer text provided.
What is inside the ignition amature?
two copper coils
a computer chip
an electrical resistor
a magnet
What role does the flywheel play in the ignition system?
Provides the magnet to complete the induction theory cycle
provides the electrical current to complete the induction theory cycle
the electrical conductor to complete the induction theory cycle
it doesn't
In one cycle of an engine how many times does the crankshaft rotate?
2
1
4
none
If your engine is running lean there will be white smoke.
True
False
What are the two valves called?
Exhaust, Intake
Intake, Outtake
Ignition, Exhaust
Up, Down
What will happen to your engine if there is too little oil?
The engine will seize
The engine may over heat
Causes wear on the internal parts of the engine
All of the above
What is this
Rocker arms
Block
Valve
push Rod
If your engine is running rich there will be black smoke.
True
False
To verify that the ______ is working, the air cleaner assembly must be removed and the throat of the carburetor checked.
air pressure regulated
primer bulb
cooling system
anti-afterfire solenoid
The direction of heat transfer is always from a _____ temperature to a ______ temperature.
lower, higher
lower, lower
higher, lower
higher, higher
The connecting rod connects what two engine parts together?
Piston and Camshaft
Piston and Crankcase
Piston and Flywheel
Piston and Crankshaft
Which of the following is a function of a small engine?
To change heat energy into mechanical energy
To change kinetic energy into potential energy
To change rotary motion into vertical motion
To change reciprocal motion into circular motion
What are the purpose of the cam lobes?
to prevent oil in the cylinder
to move the valves open and closed
decroative
to seal the air-fuel mixture during compression
What theory does the ignition armature rely on to work?
Induction Theory
Bernoulli's Principle
the Venturi Effect
Four Stroke Theory
What allows gas to come into the throat of the carburetor from the fuel bowl?
Bernoulli's Principle
the Venturi effect
Induction Theory
Four-Stroke Theory
What does the idle circuit do?
allows a little fuel/air mixture to bypass the throttle plate to maintain the engine
to mix the gas and air together
makes gas come up to the carburetor from the fuel bowl
Creates a vacuum in the combustion chamber
A disc- or cone-shaped object with teeth that engage the teeth on another.
Gear
Sprocket
Clutch
Hydrostatic Drive
A toothed wheel used to drive a chain.
Gear
Sprocket
Clutch
Hydrostatic Drive
A friction disc assembly that engages and disengages the engine flywheel to transfer power to the transmission.
Gear
Sprocket
Clutch
Hydrostatic Drive
A flexible loop designed to connect two or more pulleys to transfer rotational power is referred to as a _____
Drive train
Belt
Sprocket
Pulley
The item to the left is what?
Sproket
Gear
Pulley
Friction disc
What is the last stroke of an engine?
Exhaust
Power
Compression
Intake
What would happen if all the piston rings were aligned?
oil would get into the combustion chamber and blue smoke would appear in the exhaust
the engine would die
nothing
the engine will run smoothly
The piston is attached to the crankshaft by the:
rings
wrist pin
camshaft
connecting rod
______ is the international unit of frequency equal to one cycle per second.
Milliamp
Micron
Hertz
Henry
What is the name type of the top ring on a Piston?
Wiper ring
Compression ring
Oil ring
Combustion ring
If 1 HP equals 550 lb-ft/sec. what will 2 HP equal in 5 Minutes?
550 x 2 x 5 =
5500 lb-ft/sec
550/2 x 5 =
55 lb-ft/sec
2(550 x 300) =
330000 lb-ft/sec
(550/2) x 300 =
82500 lb-ft/sec
What does the idle spring do?
Keeps tension on the governor to maintain a consistent rpms at idle
nothing, its idle after all
Increases the gas when the engine is under heavy load
Decreases the gas when the engine is under heavy load
What is the most common type of governor system?
Electrical
Mechanical
Vacuum
Spring loaded
An action in which a force applied to an object and causes a displacement of the object
Power
Work
Force
All of the Above
Reducing wear between moving parts is a function of the ____________________________.
fuel system
starting system
cooling system
lubrication system
What % of energy released from a small engine is converted to work?
10%
30%
50%
90%
1 Horsepower is equal to?
100 Ft-lbs/sec
550 Ft-lbs/sec
1000 Ft-lbs/sec
1 Ft-lbs/sec
If a truck exerts a force of 100 lbs. and moves a load 33 ft. in 1 sec. How much Horsepower is being used? (Power = Force X Distance / time)(1HP = 550 ft.lbs/sec)
2 HP
4 HP
6 HP
8 HP
What is the reason the Department of Labor was created for?
To enforce working regulations
To start the industrial revolution
To improve working conditions for laborer's
All the above
Which below is a English standard unit of measurement to measure how long a driveway is?
Millimeter
Centimeter
Inches
Feet
Which below is a Metric standard unit of measurement to measure how long a soccer field is?
Meter
Kilometer
Miles
Yards
How much horsepower does an engine have that moves 110 lbs, 10 ft in 2 sec.?
1 HP
2 HP
10 HP
25 HP
Convert 0 °C to Fahrenheit?
-10°F
15°F
32°F
90°F
Why doesn’t a two-stroke engine require oil rings or an oil reservoir?
It's lubrication is supplied by mixing oil in the gasoline.
It doesn't need any lubrication
Because there is no spark plug
There is no combustion
What is the Primary difference between a diesel engine and a gasoline engine?
Oil Rings
There are only 2 stokes in a diesel engine as compared to 4 strokes in a gasoline engine
How fuel is ignited.
All the Above
Which below are units of measure within the Metric System?
Inches, Millimeters and Yards
Millimeter's, Grams, and Kiloliters
Feet, Yards and Miles
Kilograms, Ounces, Pounds
