Download Neiep 300 Final Exam Questions and Answers: Electronics and Circuits and more Exams Mechanics in PDF only on Docsity!
How should ammeters be used to take measurements in a circuit - correct answer ✅Connected in series with the circuit What will happen to the current in a circuit if the resistance is doubled - correct answer ✅Current will be halved How do you measure voltage in a circuit - correct answer ✅Meter must be parallel with volt being measured What is the outermost shell of an atom called - correct answer ✅Valence shell The Nucleus of an atom contains what - correct answer ✅Neutrons and protons Whats the E symbol represent in ohms law - correct answer ✅Voltage What happens to the total resistance in a wire if the length is doubled - correct answer ✅Resistance is doubled
If an atom has only one electron in its valence shell _______? - correct answer ✅Atom will act as a good conductor Unlike charges ______? - correct answer ✅Attract A neutral atom has _____? - correct answer ✅equal number protons and electrons What is the name of the unit measuring current - correct answer ✅amperes Describe current flow - correct answer ✅Uniform movement of electrons from negative to positive What is the unit that measures the quantity of electrons passing a given point - correct answer ✅Coulomb
Describe maintained contact switch action - correct answer ✅When the switch is actuated once, contacts close an remain close What type of switch would be found at a terminal landing - correct answer ✅Unidirectional limit switch What are the resistance band colors - correct answer ✅Black, Brown, Red, Orange, Yellow ,Green, Blue, Violet, Grey, White What is the tolerance on a gold band resistance - correct answer ✅5% What is the tolerance on a silver band resistance - correct answer ✅10% What is the tolerance when there is no band color - correct answer ✅20%
Which resistor has a single fixed terminal and shaft driven, moveable contact - correct answer ✅Rheostat Carbon film resistors have which characteristic - correct answer ✅Maintain close tolerances in response to temperature changes _____ have a negative temperature coefficient - correct answer ✅Thermistor Filament resistance increases when bulb is energized - correct answer ✅Incandescent bulbs Fluorescent lamps produce _______ the lumens per watt compared to incandescent lamps - correct answer ✅2x How are switches rated? - correct answer ✅by max current switch can pass when closed
What is referred to amplitude of an AC sign wave alternation - correct answer ✅Peak value What is the average voltage for one complete sign wave - correct answer ✅Zero vaults AC value that produces same heat dissipation in a resistor as an equivalent value as DC - correct answer ✅effective value One complete armature revolution through a four pole generator has how many rotations - correct answer ✅360 degree mechanical, 720 degree electrical Phases are displaced ______ in a 3 phase generator - correct answer ✅120 degress Using a rotating field to generate electricity, where is the output voltage taken from to supply the load? - correct answer ✅Stator
There is a neutral or common connection for all three phases in _______ stator connections - correct answer ✅WYE Wave form gradually rises and abruptly falls or vice versa is called - correct answer ✅Saw tooth wave Moveable portion of a relay is called - correct answer ✅armature according to the domain theory of magnesium ______ - correct answer ✅Electrons can spin in either directions Magnets created by flow of electricity are called - correct answer ✅Electro magnets Ease with which magnetic lines of force distribute themselves throughout material is referred to as? - correct answer ✅Permeability Ability of material to retain it magnetism is called - correct answer ✅Retentivity
