Ag Mechanics Flashcards
A worker in a shop lifts his protective eyewear to inspire his work. A metal fragment from a nearby work station flies into his eye causing injury. What is the chance that the fragment would strike his eye
Accident
What is a common example of an accident associated with power, structural, and technical systems.
Falling object
What is an example of a hazard
spill
In an ag shop which is the appropriate color to use for information signs such as “out of order”
Yellow
What is the highest priority regarding work done in agricultural power, structural, and technical systems
Safty
Which is the first step in the event of a spill in an agricultural shop
Tell teacher
Why is it important for business owners to promote safety in the workplace
Safety regulations
What is the primary system of internal combustion engines commonly known as
Compression systems
WHy must internal combustion engines have a method for achieving ignition in their cylinders
To start the combustion
What are the components of the operating system
Air intake system, Fuel system, exhaust system, lubrication system, starting system
List the accessory systems of an engine
Power steering, air intake system, electrical
what is the overall goal in the compression system
To effectively compress air to increase the potential energy resulting from the combustion of the fuel
what is the downward movement of the piston
Intake stroke
why should piston rings keep a secure and solid fitting on the top of the piston
To keep the liquids (oil) inside
What is the device that closes the valve and holds it open at the appropriate times
Valve spring
What device opens and closes the valves in an enguin
Camshaft
What is a component of both the air intake system and fuel system
Carburetor
What system plays a major role in heat transfer
Cooling system
___ is a part of the liquid cooling system that functions by transferring heat and is a cooling and storage area for the liquid combination of water and antifreeze
Radiator
What is the most common problem when working with engines
Lack of knowledge
what should be used to protect against falling objects
Hard Hat
The piston operated inside the
Cylinder block
What is a device that allows the fuel mixture to enter
Intake valves
What is a function in engine oil
Reduce wear on moving parts
What is the first step in disassembling an engine
Drain all the fluids
During reassemble of the engine, what should be installed in the crankshaft
Some sort of shaft to keep the camshaft from moving
If a machine is going to be stored for a long time then which of the following practices should be performed
Should be winterized
What is the biggest difference between power tools and hand tools
Power tools use electricity
Which tool should be the best selection for the purpose of cutoff work, including squaring boards, cutting them to length, and cutting then at angles or bevels
Saw
what is a tool that uses a motor to turn either a metal blade with teeth or an abrasive disk to cut through materials
Circular saw
which plumbing system brings fresh water into a structure from city water main or private well.
Main water line
Why should plumbing fixtures be near each other
To increase efficiency and reduce cost
Faucets, toilets, showers, washing machines, and water heaters can be classified as
Fixtures
What should be consulted before any plumbing work is performed
Local plumbing codes
What device is designed to stop water flow if needed
Shut off valve
If a home owner needed to measure how much waste is being used than what device would be used
Water meter
Where is the hot water supply line routed before it arrives to fixtures
on the left
How can pressure loss occur within water supply lines
A leak, size of piping, height of buildings, length of piping
If a home is using a private well for its water source then what maintains the pressure within the system
Water pump
Hot water lines should be placed on the ____, and cold water line on the ____, when diagramming and installing supply lines
Left right
What is a loud noise in a supply line caused by a volume of water that suddenly stops moving
Water hammer
What can be added to a supply line to provide a cushion of air to absorb the water
Air chamber
What is the curved section of a pipe near each fixture that holds water to prevent sewage gasses from entering the structure
Traps
What is something worn to minimize risk on the job
PPE
When lifting heavy objects what should a person do
Lift with legs
What is the most common plumbing problem
Dripping faucets, Leaky pipes, Running toilets
What is the smallest unit of an element
Atoms
As electrons move around the nucleus, how can this area be described
In rings or shells / Valence rings
What is the flow of electrons from atom to atom in a conductor
Electricity
Where does to flow of electrons take place
Outer valence ring
What can copper, aluminum, silver, and gold have in common
Good conductors
What is a good semiconductor
Silicone
What theories is the acceptable model of electrical current flow
Electron theory
One cycle of electricity per second is referred to as
Hertz
____ are materials that contain electrons that do not share or move freely
Insulators
What are primary particles with no electrical charge
Neutrons
___ is the pressure in a circuit that causes the electrons to flow through a conductor
Voltage
What is the amount of electrical current flowing past a point in a circuit
Amperage
Which of the following is an instrument used to measure amperage in a circuit
Ammeter
What is a property of any material that opposes the flow of electricity
Resistance
What has a low resistance
Conductors
There are 20 amps of current flow in a circuit with a total resistance of 8 ohms then what would be the voltage source
160 volts
What is the movement of a force through a distance
worlk
How much does one kilowatt equal
1000 watts
How is electricity sold
by the Kilowatt-hour
If .96 amps of current flows through a 120 volt circuit how many watts of electrical power are being used
115.2 watts
why is copper preferred over aluminum when wiring most branch circuits
better conductor
What is used to regulate cooling and heating systems
Thermostat
Which of the following are devices used when a convenience outlet is in the same device box with a switch
Breaker box
what is used to trace circuits and to test fuses and lines
Circuit Breaker
A ____ is one wire connected to another wire
Spliced Wire
If cutting wire, stripping conductors and attaching to terminals are required then what tool should be used
Wire strippers
How does the electrode holder protect the welder
So we dont make electrical contact
What causes the electric energy to be transformed into heat
Kinetic Energy
If electrons flow in one direction then what is this situation referred to as
DC or Direct Current
When the electrons flow from the electrode to the workpiece, It is
Arc Welding
What do the first 2 digits of a 4 digit number on an electrode indicate
Minimum Tensile Strength
