ATT TEST 1 EXAM QUESTIONS WITH 100% CORRECT ANSWERS GUARANTEED PASS

ATT TEST 1 EXAM QUESTIONS WITH 100% CORRECT ANSWERS GUARANTEED PASS “GENERAL PRECAUTIONS OF ELECTRICAL SHOCK - CORRECT ANSWER 1) Report an situation or equipment that you consider unsafe 2) Warn others who are endangered by failing to observe safety procedures 3) Always use the required protective clothing and equipment 4) Report any injuries that occur 5) Exercise caution when confronted with unforeseen situations 6) Know precisely what to do in the event of electric shock" "OSHA (Occupational Safety and Health Administration) - CORRECT ANSWER -Formulated guidelines that govern safety in the workplace -Law requires businesses to follow -Protects employees and material resources" "TRUE OR FALSE: 5X MORE DIRECT CURRENT THAN ALTERNATING CURRENT IS NEEDED TO "FREEZE" THE BODY TO AN ELECTRICAL CONDUCTOR - CORRECT ANSWER True" "ELECTRICAL BURNS - CORRECT ANSWER result of the current flowing through tissues or bone -requires immediate attention" "ARC OR FLASH BURNS - CORRECT ANSWER High temperatures near the body produced by an electric arc or explosion cause" "THERMAL CONTACT BURNS - CORRECT ANSWER burns occur when skin comes in contact with overheated electric equipment, or when clothing is ignited in an electrical incident." "ELECTRICAL ACCIDENTS APPEAR TO BE CAUSED BY: - CORRECT ANSWER 1) Unsafe equipment and/or installation 2) Work places made unsafe by the environment 3) Unsafe work practices" "4 WAYS TO PROTECT PEOPLE FROM ELECTRICAL SHOCK: - CORRECT ANSWER 1) Insulation 2) Guarding 3) Grounding 4) Safe work practices" "FUSES AND CIRCUIT BREAKERS - CORRECT ANSWER Safety devices that prevent the overheating of electric wires and monitor the amount of current Fuses melt, circuit breakers trip open the circuit when current it too much" "Ground Fault Circuit Interrupter (GFCI) - CORRECT ANSWER A device that interrupts and de-energizes an electrical circuit to protect a person from electrocution. -Shuts off power within 1/40 of a sec" "THE LAW OF ELECRTOSTATICS STATES - CORRECT ANSWER Unlike charges attract, likes charges repel" "Positive Ions - CORRECT ANSWER Atoms which lose electrons and have more positive charges (protons) than negative charges (electrons)" "Negative Ions - CORRECT ANSWER atoms with more electrons than protons" "CHEMICAL ACTION - CORRECT ANSWER -produces a constant voltage (battery)" "ELECTRON FLOW - CORRECT ANSWER -always moves from negative charge to positive charge" "MATERIALS THAT ARE GOOD CONDUCTORS - CORRECT ANSWER 1) Silver 2) Copper 3) Gold 4) Aluminum *a good conductor allows electrons to move freely" "FACTORS AFFECTING CONDUCTIVITY - CORRECT ANSWER 1) Specific resistivity of the good conductor 2) Length of the conductor 3) Cross-sectional area of the conductor 4) Temperature coefficient" "SPECIFIC RESISTIVITY - CORRECT ANSWER conductor's ability to allow free flow of electrons 1) Silver = 100% 2) Copper = 94% 3) Gold = 61% 4) Aluminum = 55%" "TYPES OF RESISTORS - CORRECT ANSWER 1) Variable Resistors 2) Fixed resistors" "FIXED RESISTORS - CORRECT ANSWER Resistors that have a value that cannot be changed. Has a specific ohmic value" "GENERAL PURPOSE FIXED RESISTOR - CORRECT ANSWER carbon composition vs carbon film" "POWER FIXED RESISTOR - CORRECT ANSWER -used when a circuit has a large current flow like power supply -made of wire wound around a core" "PRECISION FIXED RESISTOR - CORRECT ANSWER -used when an exact value of resistance is necessary for correct circuit operation" "VARIABLE RESISTORS - CORRECT ANSWER Can be adjusted to change the resistance Types: 1) Potentiometers 2) Rheostats" "POTENTIOMETERS VARIABLE RESISTOR - CORRECT ANSWER -made of carbon composition material formed in a broken circle -used when circuit flow is low" "RHEOSTATS VARIABLE RESISTOR - CORRECT ANSWER -made of wire wound on a core in a broken circle -used when circuit flow is high" "RESISTOR CHARACTERISTICS - CORRECT ANSWER 1) Power Rating 2) Tolerance 3)Ohmic value" "POWER RATING OF A RESISTOR - CORRECT ANSWER -like friction, opposes motion and generates heat -describes the amount of heat a resistor gives off -determined by size and types of resistor -measured in watts" "CIRCUIT BREAKER - CORRECT ANSWER A reusable safety switch that automatically breaks the circuit when the current becomes too high -once overload is corrected, breaker is manually closed" "CIRCUIT BREAKER CLASSIFICATION - CORRECT ANSWER 1) Magnetic- magnetic circuit breakers produces a magnetic field 2) Thermal- operate on temperature" "HOW ELECTRICITY PASSES THROUGH THE BODY - CORRECT ANSWER -Electricity travels in closed circuits, with its normal current flow from ground, through a conductor, to a voltage source. -Current always follows the path with the least resistance -When the human body closes the circuit by providing a path from ground, electric shock can occur." "CURRENT - CORRECT ANSWER Movement or flow of electrons -When electrons from a negatively charged body to a positively charged body an electric current is developed" "GROUND - CORRECT ANSWER Part of a circuit that is electrically connected to earth. -The ground provides a common return point for voltages and signals" "CONDUCTOR - CORRECT ANSWER An object that provides a path for electricity to follow" "VOLTAGE - CORRECT ANSWER -The force or pressure that moves current -Also known as EMF, electromotive force -Unit= volt" "RESISTANCE - CORRECT ANSWER -A material's opposition to the flow of electric current. -Unit= ohms" "FACTORS THAT AFFECT BODIES RESISTANCE - CORRECT ANSWER 1) Skin- unbroken dry skin has a higher resistance than wet, cut, bruised, or burned skin 2)Moisture 3) High voltage 4) How tightly the victim is grasping the voltage source" "THE AMOUNT OF CURRENT THAT CAN PASS THROUGH THE BODY WITHOUT DANGER DEPENDS ON: - CORRECT ANSWER 1) Individual 2) Amount of current 3) Type of current 4) Path of current 5) Contact time" "PRIMARY FACTORS FOR SHOCK SEVERITY: - CORRECT ANSWER 1) The amount of current flowing through the body 2) The path of the current through the body 3) The length of time the body is in the current OTHER FACTORS: 1) Frequency of the current 2) The phase of the heart cycle when shock occurs 3) The general health of the person" "THE EFFECTS OF ELECTRIC SHOCK DEPENDS ON - CORRECT ANSWER 1) The type of circuit 2) The duration of contact 3) The circuit's voltage, resistance, and current 4) The pathway that electricity takes through the body" "EXAMPLES OF ELECTRICAL PROTECTION DEVICES - CORRECT ANSWER 1) Fuses 2) Circuit breakers 3) Ground-fault circuit interrupters" "HIGH VOLTAGE SAFETY - CORRECT ANSWER 1) Consider the results of each act 2) Keep away from live circuits 3) Do not work alone 4) Do not tamper with interlocks 5) Never ground yourself 6) Do not energize electrical equipment around water" "INSULATION - CORRECT ANSWER -Any material with high resistance to electric shock -ex= glass, rubber, plastic -often color coded" "GUARDING OF LIVE PARTS - CORRECT ANSWER 1) Location in a room, vault, or similar enclosure accessible only to qualified persons 2) Use of permanent, substantial partitions or screens to exclude unqualified persons 3) Location on a suitable balcony, gallery, or platform arranged to exclude unqualified persons, or elevation of 8ft or more 4) Entrances to rooms and other guarded locations must have warning signs 5) Indoor wiring w/ 600 volts or more must be enclosed and locked" "GROUDING - CORRECT ANSWER -Protects people from electric shock -"Ground" refers to a conductive body, usually earth and means a conductive connection where an electric circuit or equipment is connected to earth -provides a low-resistance path between the tool or system and the earth" "2 KINDS OF GROUND - CORRECT ANSWER 1) Service or system ground 2) Equipment ground" "SERVICE OR SYSTEM GROUND - CORRECT ANSWER white or grey wire grounded at the generator or transformer and service entrance of a building / used to protect machines, tools, & insulation against damage" "EQUIPMENT GROUND - CORRECT ANSWER -Automatically limits or shuts off flow of electricity in the event of a ground-fault, overload, or short current -Enhances protection to the worker" "STEPS TO TAKE IN THE EVENT OF ELECTRICAL SHOCK: - CORRECT ANSWER 1) Summon emergency medical help and remove the victim from electrical contact (Do not touch them with your hands) 2) Once removed from electrical source, determine if victim is breathing 3) If not breathing, perform CPR 4) If breathing (before or after CPR) treat for traumatic shock 5) Stay w/ victim until medical help arrives" "TREATMENT FOR SHOCK - CORRECT ANSWER -Cover victim w/ a coat or blanket to conserve body heat -Loosen clothing to promote unrestricted respirator functions -Keep victim quiet and still" "CLASSES OF FIRE - CORRECT ANSWER Classes: A - wood, cloth, paper, rubber and plastics B - flammable liquid and gases C - fire involving energized electrical equipment D - involving combustible metals (such as magnesium, sodium, potassium)" "STEPS FOR A CLASS C FIRE - CORRECT ANSWER *Never use water or foam to extinguish an electrical fire 1) De-energize the circuit 2) Call the fire department 3) Control or extinguish the fire w/ the correct type of fire extinguisher 4) Report the fire to the appropriate authorities" "ATOMS - CORRECT ANSWER -particle too small to be subdivided further Consists of : 1) Electrostatic force: attraction between the nucleus and electron 2)Electrons" "TRUE OR FALSE: IF SEVERAL NEGATIVE IONS ARE GROUPED IN ONE AREA AND SEVERAL POSITIVE IONS ARE GROUPED IN ANOTHER AREA THERE IS POTENTIAL DIFFERENCE BETWEEN THE TWO GROUPS - CORRECT ANSWER True" "ELECTROMOTIVE FORCE (EMF) - CORRECT ANSWER Force created by the ions trying to become neutral" "6 WAYS ELECTRONS MOVE OUT/6 WAYS TO MAKE VOLTAGE - CORRECT ANSWER 1) Friction 2) Pressure 3) Heat 4) Light 5) Magnetism 6) Chemical Action" "FRICTION - CORRECT ANSWER -Rubbing one material against another material can generate voltage -electrons are dislodged from the atoms of the material and forced to move -only small amounts of voltage is created" "PRESSURE - CORRECT ANSWER -Squeezing certain types of crystals can generate voltage -Produces small of voltage -common in microphones and phonograph pickups" "HEAT - CORRECT ANSWER -Heating the junction between 2 different metals will produce voltage -produces small amount of voltage -use for temperature detecting devices" "LIGHT - CORRECT ANSWER -produces voltage by striking light sensitive material such as silver and copper oxide -produces small voltage -used in sensing devices like alarms" "MAGNETISM - CORRECT ANSWER -produces voltage when a metal rod is moved through a magnetic field -large amounts of voltage is produced" "CONDUCTOR LENGTH - CORRECT ANSWER -Longer length conductors offer more resistance to electron flow than shorter conductors" "CROSS-SECTIONAL AREA - CORRECT ANSWER conductors w/ larger cross sections provide less resistance to electron flow than smaller conductors" "TEMPERATURE - CORRECT ANSWER All conditions are affected by ambient temperature -Lower temperature= more electron flow -Higher temperature = less electron flow" "THE ELECTRIC CIRCUIT - CORRECT ANSWER -Device used to control voltage and current -voltage is generated at a power station, current is sent through wires" "ELECTRIC CIRCUIT CONTAINS: - CORRECT ANSWER 1) Voltage Source 2) Conductor 3) Load" "Voltage Source - CORRECT ANSWER a device that creates a potential difference in an electric circuit -represented by the letter (E) or (V)" "CONDUCTOR - CORRECT ANSWER a material that provides a path for current to flow -represented by the letter (I)" "LOAD - CORRECT ANSWER -can be any device as along as current can flow -provides resistance to current -represented by the letter (R)" "RESISTORS - CORRECT ANSWER -controls voltage and current -unit of measure = ohm -represented by the letter (R)" "TOLERANCE OF A RESISTOR - CORRECT ANSWER -amount of difference that is acceptable between the measure ohmic value and he indicated values, known as percent error -described in percent (1%, 5%, 10%) -indicated by a color band (4th band)" "OHMIC VALUE OF A RESISTOR - CORRECT ANSWER -identified by color code or number/letter code" "SWITCH - CORRECT ANSWER A device for making, breaking, or changing the connections in an electrical circuit. -identified by the number of poles and throws" "TYPES OF SWITCHES - CORRECT ANSWER 1) Toggle 2) Rotary 3) Push 4) Slide" "PROTECTION DEVICES - CORRECT ANSWER -sense excessive increase in current flow and open circuits before damage occurs Types: 1) Fuses 2) Circuit breakers" "FUSE - CORRECT ANSWER A safety device with a thin metal strip that will melt if too much current passes through a circuit Classified as 1) Fast action- melts in less than 1 sec 2) Slow-blow- melts approx. 30 secs after overload" "MAGNETISM - CORRECT ANSWER The force of attraction or repulsion of magnetic materials" "CHARACTERISTICS OF A MAGNET - CORRECT ANSWER 1) North and South pole 2) Flux lines (magnetic field)" "TRUE OR FALSE: THE MORE FLUX LINES THE STRONGER THE MAGNETIC FIELD - CORRECT ANSWER TRUE" "RETENTIVITY - CORRECT ANSWER the ability of a material to retain its magnetism after the magnetizing force has been removed" "ELECTROMAGNETISM - CORRECT ANSWER The relationship between electricity and magnetism; man-maded" "INSIDE A MAGNET, FLUX LINES MOVE - CORRECT ANSWER South to North -the left hand rule is used to determine the direction of flux lines" "MAGNETOMOTIVE FORCE - CORRECT ANSWER the force that creates magnetic lines of flux when a current is passed through a coiled conductor -closer the loops- stronger the field -placing loops in the conductor or wrapping the conductor around a core increases the magnetic field" "MAGNETIC FIELD STRENGTH IS DETERMINED BY: - CORRECT ANSWER 1) Number of coil windings 2) Distance between windings 3) Amount of current 4) Composition of the core" "ELECTROMAGNET USES: - CORRECT ANSWER 1) RELAYS- attracts the metal arm of a switch to open or close 2) CIRCUIT BREAKERS- used to protect the circuit from overload of current 3) METERS- moves the meter's needle to indicate a measured value" "MULTIMETER MEASURES - CORRECT ANSWER Voltage, current, and resistance. Types: Analog and digital" Which Quantities can be measured by a multimeter..... - CORRECT ANSWER Voltage, Current, Resistance" "Multiply (3.3x10^3)x (1.2x10^-6) - CORRECT ANSWER 3.96x10^-3" "Add (4x10^3)+ (3x10^5) - CORRECT ANSWER 304x10^3" "Convert 2.5 mega to units - CORRECT ANSWER 2,500,000 Units" "Convert 4x10^-3 To the Decimal Equivalent - CORRECT ANSWER 0.004" "Divide (8x10^6) / (4x10^2) - CORRECT ANSWER 2x10^4" "What symbol is used to represent a voltage symbol? - CORRECT ANSWER V" "The flow of electrons is called.... - CORRECT ANSWER current" "What force is needed to move an electrically charged body from one point to another - CORRECT ANSWER Voltage" "the basic unit of electric current is the... - CORRECT ANSWER Ampere" "Power Resisters Are normally.... - CORRECT ANSWER Wire Wound" "What is the purpose of a resistor? - CORRECT ANSWER To control Current Flow" "a switch is in the open position... - CORRECT ANSWER Stops current flow" "Where Should the black test lead be connected when you are measuring resistance.... - CORRECT ANSWER To The COM Imput Jack" "Where should the red test lead be connected to when measuring resistance..... - CORRECT ANSWER To The V.OHM or V.OHM.MA Imput Jack" "The Red Test lead should always be connected to.. - CORRECT ANSWER The Point Of More Positive Potential" "Resistance - CORRECT ANSWER Opposition to current flow" "What is resistance measured in? - CORRECT ANSWER Ohms" "Grounding conductor - CORRECT ANSWER Low resistance wire attached to equipments metallic case that causes chore t to by pass human operator" "Electrical accidents caused by a combination of 3 factors - CORRECT ANSWER A. Unsafe equipment B. Workplaces made unsafe by the environment C.unsafe work practices" "What do you do before tool use - CORRECT ANSWER Inspect it" "Use googles with what equipment - CORRECT ANSWER Equipment that sparks/causes debris" "Always assume what? - CORRECT ANSWER Assume that the tool is hot. Grab by handle" "What not to use on class C fire - CORRECT ANSWER Water" "What to use on a class C fire - CORRECT ANSWER CO2 or dry chemical" "First step while combating fire - CORRECT ANSWER Remove power" "Define potential difference - CORRECT ANSWER Difference between the ability of two charged objects to provide the force that moves electrons" "Electrons + or - - CORRECT ANSWER Negative charge (exit and they're mad "negative")" "Protons + or - - CORRECT ANSWER Positive charge" "Electric charge unit of measure - CORRECT ANSWER Coulomb. 6.25X10^18" "Voltage - CORRECT ANSWER Moves the electrons from one point to another. (Water pressure) is" "Unlike charges repel or attract - CORRECT ANSWER Attract" "Like charges repel or attract - CORRECT ANSWER Repel" "Current - CORRECT ANSWER Flow of electrons from negative to positive" "What is an ampere - CORRECT ANSWER Unit of measure for a current" "Resistor - CORRECT ANSWER Electronic component used as a limiting device to adjust and set voltage and current levels in a circuit" "What's an ohm - CORRECT ANSWER Electrical RESISTANCE unit" "What's a watt - CORRECT ANSWER Power is measured in watts" "Voltage - CORRECT ANSWER A measure of the difference in electric potential between two points in space, a material," "The Functional Section Of a Multimeter used to indicate Measured Quantities is the... - CORRECT ANSWER Display" "The most common injury related to electric shock is..... - CORRECT ANSWER Burns" "Electrical Shock will occur when a individual touches.... - CORRECT ANSWER The ground and the circuit" "When selecting a wrench it is important to.... - CORRECT ANSWER Select the right size" "A Good safety practice to use when making electrical measurements is to... - CORRECT ANSWER Keep one hand in one pocket" "Which skin condition provides the most resistance.... - CORRECT ANSWER skin that is dry and unbroken" "Standing on a rubber mat while working on electrical equipment may..... - CORRECT ANSWER Prevent a direct path to ground" "What will happen to a circuit if it has excessive current flow ( Fuse)..... - CORRECT ANSWER Melts A Small Wire" "Where would you expect to find the power supply on a schematic diagram... - CORRECT ANSWER At the bottom left of the schematic" "what is indicated by two lines that intersect on a schematic that have a dot... - CORRECT ANSWER They are connected" "What is a chassis ground? - CORRECT ANSWER a common connection point in a circuit and usually the negative side of the power supply" "All Magnets Have..... - CORRECT ANSWER Flux Lines, A Magnet Field and North and South Poles." "Flux Lines - CORRECT ANSWER The invisible lines of force that surround a magnet." "The Functional Section of a multimeter used to indicate measured quantities is the... - CORRECT ANSWER Display" "Which Of The Following is not a functional section of the multimeter... - CORRECT ANSWER Test Leads" "Which Of The Following Parameters Can not be measured by a multimeter... - CORRECT ANSWER Inductance" "Which component is used to open circuits for current measurements... - CORRECT ANSWER A Switch" Shock severity primary factors - CORRECT ANSWER 1. Amount of current flowing through body 2. Path of the current through body 3. Length of time the body is in the circuit" "Electric shock - CORRECT ANSWER Electricity passing through the body" "Types of Electrical burns - CORRECT ANSWER A. Electrical burns B. Arc burns C. Thermal contact burns" "What is a current? - CORRECT ANSWER Movement or FLOW of electrons" "Ground - CORRECT ANSWER Part of circuit that is electrically connected to earth" "Minimum AC current normally req'd to cause severe muscular contractions - CORRECT ANSWER 12 ma" "Conductor - CORRECT ANSWER Object that provides a path for electricity to flow" "Voltage - CORRECT ANSWER Force or pressure that moves current" "How to protect people from the hazards of caused by electricity - CORRECT ANSWER A. Insulation B. Guarding C. Grounding D. Safe work practices" "Electrical protection devices examples - CORRECT ANSWER 1. Fuses 2. Circuit breakers 3. Ground fault interrupters" "Green or green w/ yellow stripes insulator color - CORRECT ANSWER Equipment grounding conductors" "White or natural grey insulator color - CORRECT ANSWER Grounding conductor that complete circuit" "Any other color of insulator (red black) - CORRECT ANSWER "Hot wires" ungrounded" "What is a capacitor - CORRECT ANSWER Stores an electrical charge (capacity)" "What is a Shorting probe - CORRECT ANSWER Discharges capacitors so they can be worked on" "In case of fire - CORRECT ANSWER 1. De energize the circuit 2. Call fire dept. 3. Control/extinguish fire with correct extinguisher 4. Report to appropriate authorities"