ELE 146 EXAM QUESTIONS ANSWERED CORRECTLY LATEST UPDATE 2026

ELE 146 EXAM QUESTIONS ANSWERED CORRECTLY LATEST UPDATE 2026 Contacts are used in: - AnswersContactors Who should remove a lock-out / tag-out? - AnswersOnly the person who installed it Which of the following is not a rule of drawing a ladder diagram? - AnswersAt least 2 loads per line The contact shown in the figure is a(n) ___________ ? - AnswersTrue One application of interlocking is to cause both the forward and reverse coils of a reversing contactor to be energized at the same time. - AnswersFalse A Hand-Off-Automatic (H-O-A) circuit requires a selector switch with __________ positions. - Answers3 A __________ is often used to allow an operator or technician to change a machine from the automatic mode to the manual mode. - AnswersSelector switch When batteries are wired in Series, you are increasing the Voltage. - AnswersTrue A disconnect is a switch that will: - AnswersManually remove power from a circuit or apply power to a circuit To quickly determine if a circuit is hot, what is the simplest tool to use? - AnswersVoltage meter The measured unit of electromotive force is a __________. - AnswersVolt What are the three fundamental particles contained in atoms? - AnswersProtons, electrons and neutrons. Which particle has a negative charge? - AnswersElectrons What unit is used to measure resistance? - AnswersOhms . What device allows current to flow in only one direction? - AnswersDiode What type of fuel is used to produce the most amount of electricity? - AnswersCoal What electrical devices consume the largest share of produced electricity? - Answers3 phase motors Voltage is measured in volts (V), but what letter is used to represent voltage? - AnswersE What device converts AC voltage to DC voltage? - Answersrectifier What are the two types of AC voltage? - Answerssingle phase AC, three phase AC . Current is measured in amperes (A), but what letter is used to represent current? - AnswersI . What are the two types of current? - AnswersAlternating and direct Resistance is measured in ohms (Ω), but what letter is used to represent resistance? - AnswersR If resistance is increased in a circuit, does current increase or decrease? - Answersdecreases If 12 V is applied to a circuit that has a resistance of 500 Ω, how many milliamperes (mA) will flow through the circuit? - Answers24 milliamperes (mA) If 230 V and 6.25 A are measured in a heating element, how much resistance (in Ω) does the heating element have? - Answers36.8 ohms Which type of diagram helps when troubleshooting because it shows a logical path to take that helps solve a problem? - Answersflow charts Which type of diagram shows physical details, such as the length and height of an object, as seen by the eye? - Answerspictorial drawing Which type of diagram uses symbols to show the interconnections of components in electronic circuits? - Answersschematic diagram . Which type of diagram shows the logic of an electrical circuit drawn with vertical power lines and circuit components drawn on horizontal lines between the power lines? - Answersline diagram What are the five parts of a basic electrical circuit? - Answerspower source, conductor, control switch, protection device, load What are the two basic types of circuit protection devices? - Answerscircuit breakers and fuses In electrical switches, what do the abbreviations NO and NC stand for? - AnswersO : normally opened, NC : normally closed What electrical device is used to turn a motor on and off and includes overload protection? - Answersstarter What electrical device converts electrical energy into a linear mechanical force? - Answerssolenoid What are the two basic types of contactors? - Answersenergized and de-energized What is the best type of pushbutton operator to use in an emergency stop application? - AnswersJumbo Mushroom Button Operators Can one pushbutton operate both NO and NC contacts? - AnswersA pushbutton with a contact block can operate both NO and NC contacts What type (number) NEMA enclosure can be used to protect internal electrical components against prolonged submersion at a limited depth, such as occasional flooding of an area? - Answers6P . What is the IEC number used to describe the enclosure type that can be used to protect internal electrical components against prolonged submersion at a limited depth, such as occasional flooding of an area? - AnswersIP38 A selector switch with a legend plate labeled SLOW/FAST is an example of what type of selector switch? - AnswersTwo Position Selector Switch A selector switch with a legend plate labeled SLOW/OFF/FAST is an example of what type of selector switch? - AnswersThree Selector Switch In a truth table, an X represents what condition of the contacts? - AnswersCloses condition in any position In a truth table, an O represents what condition of the contacts? - AnswersOpen (open contact) What is the main advantage of using a joystick in an application such as moving the passenger loading ramp to and from an airplane door? - AnswersTwo advantages are being able to move the loading ramp forward or backwards based on your needs, and not having to remove your hands from the joystick nor your eyes from the task being preformed. In a joystick symbol, what does the dot represent? - Answersposition where contact will close If the moving part of a limit switch is drawn below the contacts in the symbol, is the switch NO/NO held closed or NC/NC held open? - AnswersNO: held closed NC: held open If the moving part of the limit switch is drawn above the contacts in the symbol, is the switch NO/NO held closed or NC/NC held open? - AnswersWhen NC is closed, NO will be held open . What type of limit switch actuator allows detection of a moving object from any direction except head on? - Answerspush roller What type of limit switch actuator allows the arm length to be adjusted to meet the application? - Answerslevers When a foot switch has three positions, does the toe usually operate all three positions? - AnswersNo Is the OFF position of a foot switch usually a maintained position or a spring-loaded position? - Answersspring loaded position When a pressure switch is rated in "in. WC," what does "in. WC" stand for? - Answersinches of Water Column If a pressure switch is used to maintain a set pressure, are NO or NC contacts used to control the compressor motor starter? - AnswersNC If a temperature switch is used in a heating system to maintain a set temperature, are NO or NC contacts used to control the heating contactor? - Answersheating system is controlled using NC contact If a temperature switch is used in a cooling system to maintain a set temperature, are NO or NC contacts used to control the air condition system? - Answerscooling systems use NO 1. If a flow switch is used to sound an alarm when there is no flow, are NO or NC contacts used to control the alarm? - AnswersNO contacts If a flow switch is used to detect flow in an automatic sprinkler system that has detected a fire and opened the sprinklers to flow, are NO or NC contacts used to control the alarm? - AnswersNC contacts If a level switch is used in a charging system, are NO or NC contacts used to control the pump motor starter? - AnswersNC contacts If a level switch is used in a discharging system, are NO or NC contacts used to control the pump motor starter? - AnswersNO contacts Is a diode used to help protect electrical contacts in an AC or DC load switching circuit? - AnswersDC What position are most flow switches designed to operate in? - AnswersHorizontal Position If a voltage is measured going into a control switch and no voltage is measured out of the switch, what operating conditions might the switch be in? - Answersclosed conditions If a voltage is measured going into a control switch and the same voltage is measured going out of the switch, what operating conditions might the switch be in? - Answersopen conditions Does the added iron core of an electromagnet increase or decrease the magnetic lines of force? - Answersincreases magnetic lines of force In an electromagnet, what determines the strength of the magnetic field? - Answersstrength of the current What is the left-hand rule used to determine when the direction of current flow is known? - Answersf the fingers of the left-hand wrap in the direction of current flow than the left thumb points towards the magnetic north pole of the coil. What is the movable part of a solenoid called? - Answersarmature Why are solenoid armatures laminated? - AnswersTo keep them from chattering. Why is a shading coil added to the armature of a solenoid? - AnswersHolds the armature as magnetic field approaches zero in an AC circuit What is the initial current draw of a solenoid called? - AnswersInrush Current What is the operating current of a solenoid called? - AnswersSealed Current If the voltage applied to a solenoid is higher than the rating of the solenoid, will the current draw increase or decrease? - AnswersIncrease What is the number of times a solenoid can operate in a given time period (usually operations per minute) called? - AnswersDuty Cycle