OPE Electrical Mid-Term

Each OPE manufacture uses the same set of standardized wire  colors.

​Most conductors have only ____ valence electrons.​

​The primary source of electrical power required is the _________. A secondary power source is a __________.​

​Fire extinguishers must be tested for proper charge every ______ and refilled immediately if discharged.​

​A _____ is a battery test that measures battery terminal voltage after 15 seconds of high-rate discharge​

__________ systems provide a spark in the combustion chamber to start an engine

A wiring diagram is essentially the same as a(an) _________________

A __is a circuit that power is present in only when the key switch installed in the in the circuit is activated in run

A _____________ is a device that converts electrical energy into linear motion.

_________________ materials do not conduct electricity easily and are not good insulators

Cold cranking amps is the amperes produced by a battery for 30 sec at 0 degrees F while maintaining 1.2v per cell.

Diagrams describing the charging systems and components follow the electron theory current flow commonly in OPE.

A free electron is also known as an isotope.

A ____________ switch is a switch used to control power to an implement attached to a lawn or garden tractor.

_________​ in a circuit can hold a charge for a considerable length of time after removing the power source.​

A secondary cell, also known as a dry cell cannot be recharged.

Electricity is not dangerous if you are an expert.

​Electrons flow from negative to positive through the crystal when voltage is applied to the ________ material.​

Induction in the magnetic fields in the armature create _______________.

____ is a thin, neutral area at the junction of P-type and N-type materials where the two materials exchange carriers.

Switches that are affected by ________________ include traction, brake, mow, and backlap switches.

The positive battery terminal in a Li-ion battery is also known as the cathode.

Electrons are the smallest particle that an element can be reduced to and still maintain the properties of that element

One of the main components for a modern 12v battery is a _______

An AC  sine wave is a symmetrical waveform that contains 360 electrical degrees.

Electromagnetic clutches have a specific _______________ that is maintained between the armature and the rotor.

A low-impedance test light is an LED test light that has 10 M ohm of resistance.

Battery condition is commonly checked using a hydrometer.

Any components in an unswitched circuit are to be considered energized at all times.

​A _______ test is a verification of a circuit to see if it is open or closed.​

If wires are not connected, the diagrams will show lines intersecting without a dot

Ground symbols represent either chassis ground or earth ground

A typical foot injury is caused by objects falling less than ____ feet with an average weight of approximately 65 lbs.

​A ammeter is a device installed on equipment with an internal combustion engine that indicates the battery voltage.​

The electrolyte in a battery is heavier when the battery is fully charged.

The voltage generated across the electrodes depends on the ___________ and the electrolyte.

A diode has a relatively low resistance in the forward-bias direction and a high resistance in reverse-bias.

Higher voltages can be obtained by connecting two or more 12v batteries in series.

​The number and type of fire extinguishers required for a specific work area is determined by the ______ .​

______ are circularly wound wire (winding) that consists of insulated conductors arranged to interact with lines of flux

Wiring diagrams are typically included with most ______________

​A _____ is a 1Response that represent an operation, a quantity, or a unit.​

If student misses _____ days of school with unexcused absences, one elective credit may be retracted from the student.

Boolean logic is used when testing normally open, normally closed, and combination switches.

The two types of grounding that must be considered by a technician are ___________________

_____ is the addition of impurities to the crystal structure of a semiconductor to allow electrons to flow

​The three basic types of battery chargers are continuous, low rate chargers; timer-controlled chargers; and _______.​

____ are used in electrical applications such as starter motors, flywheels, and DC motors for battery-powered equipment.

______ is voltage that is applied with polarity that allows a diode to act as a conductor.

Testing multiple-pole, multiple-throw switches is typically referred to as _____________ the switch.

​The two main types of relays are electromechanical relays (EMRs)and solid-state relays (SSRs).​

The specific gravity of water is __________, or 1.000.

All burn victims should be treated for __________.

Voltage drop testing can isolate areas in a circuit where undesirable ____________ is present.

 Ignition systems are designed to operate efficiently with specifically designed components and should _____

One type of electrical diagram commonly used in the OPE industry is a trouble-shooting diagrams

A _________________ is a section of wire that is designed to melt when a circuit becomes overloaded.

​SSRs use a _______, triac, or transistor output instead of  mechanical contacts to switch the controlled power.​

With the carburetor solenoid energized, the carburetor solenoid plunger ______________, allowing fuel to flow.

Transformers may have an air core or iron core.

Relays are also used to switch multiple components at the same time using one output.

If test instruments are not properly connected, the likelihood of improper measurement or meter reading increases, and _

​The size and intensity of a self-induced magnetic field is proportional to the amount of current passing through the _​

Constant-voltage chargers have __________ that monitor the circuit currents.

It is ok to assume that a test instrument is operating correctly.

The wires used in CAN bus electronic systems are shielded to reduce electrical noise from affecting the control signals.

The ___________________ behavior of matter varies according to the physical makeup.

A _____________ switch is a switch that interrupts current flow in the normal position.

________________ is a DMM mode used to test the condition of a diode.

Components in a parallel circuit share the same voltage.

Electricity produced by the chemical reaction in the battery is replaced using an ________________

____ protect proprietary information (exact device of component information) that a manufacture may not want to release.

​ __ is a DMM mode that records a reading and displays the difference between that reading and subsequent measurements.​

​While _______ can make electrical repairs easier, the connectors can also be a source of  problems if they degrade.​

A (an) ____________ may be used to maintain stability and provide additional support when lifting.

A reverse-biased direction does not allow current to flow through a diode.

A conventional lead-acid battery usually never becomes discharged by more than _________.

Diagrams describing the charging system follow the traditional ___________________ current flow commonly used in OPE.

A face shield is an eye protection device which covers the entire head with a glass shield.

Corrosion around battery terminals can be neutralized with 1/4 ____ of baking soda and one gallon of water.

A breaker point is an ignition system component that has two points that function as a mechanical switch.

the 120 V starter motor incorporates a ____________ to convert the 120 VAC  from the power source to DC.

_________in an electrical system can be comparable to system pressure in a fluid power system.

Touching the red lead to a live circuit before the black lead can create a potential shock hazard.

A  ___________ is an electrical charge produced when there are more protons than electrons.

When SSRs begin to short-circuit, they will almost always fail.

A ____________________ must have a fluent understanding of the symbols used with schematics and diagrams.

​In the event that an incorrect measurement is taken, a ____ DMM could explode, but a fused DMM would simply shut off​

Preventing or minimizing damage while working with electrical equipment requires a ___ of equipment and tools, and PPE.

​Use ___ when working on a live circuit to reduce the chance of an electrical shock passing through the heart and lungs​

For maximum induced electron flow, the lines of magnetic flux must be ____________________ to the conductor.

​A person standing on a wet floor has _____ resistance than a person standing on a dry floor.​

​  the condenser provides a more consistently timed breaking of the circuit.

______________ diodes are the most widely used diodes because of their small size and weight.

_________ must be tested prior to taking current measurements.

_________ include electrical equipment such as motors, appliances, wiring, fuse boxes, breaker panels, and transformers.

_________may be produced by electromagnetism, chemicals, light, heat, pressure, or friction.

The resistance of a test lead must be ________ 1 ohm.

Current is the flow of protons through an electrical circuit

OPE electrical systems commonly include lead-acid batteries