Power Engineering - 4A Electrotechnology Practice Questions with Certified Answers

Power Engineering - 4A Electrotechnology Practice Questions with Certified Answers An ampere is the _______________ of current flow. a. measurement b. cause of increase c. cause of reduction d. cause e. resistance a. measurement An electrical device which is designed to start and stop current flow is the a. circuit breaker b. fuse c. potentiometer d. resistor e. switch e. switch Equivalent resistance is decreased: a. when voltage is decreased b. when a circuit is in parallel c. if the amperage is increased d. when a circuit is opened e. when a circuit is in series b. when a circuit is in parallel The electrical unit of power is the: a. joule b. coulomb c. watt d. milliamp e. watthour c. watt Most conductors tend to: a. melt when voltage is applied b. oscillate when voltage is applied c. shrink when heated d. decrease in resistance with increase in temperature e. increase in resistance with increase in temperature e. increase in resistance with increase in temperature An insulator is material that will not _____________ an electrical current. a. resist b. conduct c. reduce d. retard e. slow b. conduct The opposition a device or material offers to the flow of electric current, is known as: a. a voltage drop b. an insulator c. a resistance d. a short circuit e. counterflow c. a resistance In an equivalent circuit developed from a multi resistor series circuit: a. original circuit resistances will each have to be the same as the equivalent resistance b. the sum of voltage drops across the original resistances will be equal to the voltage drop of the equivalent circuit c. voltage drop will be the same as for each of the original resistances d. the resistance will be the reciprocal sum of the original resistances e. amperage flowing will be different than the original circuit amperage flowing through each resistance b. the sum of voltage drops across the original resistances will be equal to the voltage drop of the equivalent circuit Since the discovery of electrons, it has been determined that electrons are a negative charge and flow from: a. north to south b. negative to positive c. the battery to the source d. positive to negative e. a lower potential to a higher potential b. negative to positive __________ current flow is from positive