Master Electrical REAL Exam Questions And Correct Answers | Verified

Master Electrical REAL Exam Questions And Correct Answers | Verified Control the speed of the motor - ANSWER The purpose of having a rheostat in the field of a DC shunt motor is to ________. An ammeter, a wattmeter, and a voltmeter - ANSWER You are to check the power factor of a load, you cannot get a power factor meter, you would use__________. Lead sheath - ANSWER High voltage cable which is to be installed in underground ducts is generally protected with a __________. Lower wattage bulbs - ANSWER What common light bulb has the higher resistance? Commutator or slip rings - ANSWER One identifying feature of a squirrelcage induction motor is that it has no ________. The conduit thread is tapered - ANSWER The difference between a thread on a bolt and a thread on a conduit is ___________. Insulated or covered - ANSWER Open conductors run individually as service drops shall be _________ or _________. Commutator - ANSWER A ___________ is a function that is similar to a rectifier Cable terminal - ANSWER The term "pothead" as used in the electrical trade means __________. Highest when bulb is on - ANSWER The resistance of the filament in a light bulb is __________. Remote-control - ANSWER When one electrical circuit controls another electrical circuit through a relay the circuit is a ________ circuit. Shorted - ANSWER A ammeter is disconnected from a current transformer (CT) , the leads should be _________. Cartridge - ANSWER A fuse puller is used to replace __________ fuses. B-C-A - ANSWER If the voltage rotation of a three-phase motor is A-B-C, the current rotation is _________. The same ampacity - ANSWER Aluminum and copper-clad aluminum of the same circular-mil and insulation have _______. A fired clay; cooked earth. Used for pottery, building material - ANSWER Define terra cotta Rawl plugs - ANSWER To fasten a box to a terra cotta wall you would use _________. The lack of isolation between the primary and secondary - ANSWER The disadvantage of an autotrasformer is_________. Ammeter, wattmeter and voltmeter - ANSWER The power factor can be determined by the use of which combination of the meters? ______ is the letter(s) used to indicate capacitive reactance in a circuit. A) XL, B) Z, C) HZ, D) XC - ANSWER XC 10 - ANSWER Conductors drawn from a copper-clad aluminum rod with the copper metallurgically bonded to an aluminum core. The copper forms a minimum of ________ percent of the csa. Silver - ANSWER Relay contacts are made of ___________. The organization or system used for doing or operating something - ANSWER Defined apparatus An overload - ANSWER Operation of equipment in excess of normal, fullload rating, or of a conductor in excess of a rated capacity which, when it persists for a sufficient length of time, would cause damage or dangerous overheating is called __________. ( high power factor) = having a high power factor, tells you, that the POWER FACTOR is close to unity(1.0). Which is what you want in a circuit. Because that means that the power is IN PHASE and this is called TRUE POWER. We don't want to have a low power factor, because that means the circuit power is OUT OF PHASE , meaning that you have to much inductance or capacitance, which is called APPARENT POWER. - ANSWER In an AC circuit a value of watts divided by a value of volt-amps, what should the power factor be to indicate close to unity? Steel - ANSWER A transformer core is made of_________. 4 1/2 - ANSWER Flexible metal conduit shall be secured by an proved means at intervals not exceeding ___________ feet and within 12" on each side of every outlet box , junction box, cabinet, or fitting. Hot or ungrounded - ANSWER An insulated conductor with a white or gray finish shall be permitted as _________ or _______ conductor where permanently reidentified to indicate its use, by painting or other effective means at its termination and at each location where the conductor is visible and accessible 0.0129, is because if you double the cross-sec