MECP Exam Questions With Verified And Updated Solutions.

MECP EXAM Questions With Verified Solutions. What is found on Pin 1 of the OBD II - answerLSDT CAN High What is found on Pin 9 of the OBD II - answerLSFT CAN Low Define the XOR gate - answerBoth inputs can not be TRUE for a TRUE output. If they are the output is FALSE. What is a logic gate - answerProduce a specific output state based on the condition of one or more inputs. What determines the polarity of the current to trigger a transistor - answerThe middle letter What are the different layers of MOST - answerPhysical layer Data link layer Network layer Transport layer Session layer Presentation layer Application layer If a circuit design requires a threshold voltage of 5.1v and a 5.1v Zener diode is used with 10% tolerance, what is the range - answer4.845v low 5.355v high What are the names of the start and stop codes with he asynchronous signal - answerStart of frame SOF End of frame EOF How do you determine the in and out of the MOST network - answerRemove the most plug from the device while the vehicle is asleep and shine a flashlight into the housing. The device will reapond from the output side with a res beam of light. What is a XNOR gate - answerA combination XOR gate followed by an inverter. Its output is true if the inputs are the same and false if the inputs are different. What are the two most common forms of logic gate arrays implemented into integrated circuits - answerTransistor transistor logic TTL Complentary Metal Oxide Semiconductor CMOS Describe MOST 25 - answerThe device will have constant power, chassis ground, and usually a wake up diagnostic wire. Typical colors are orange or green. Max speed of 25M baud and 512 bits What does the bias on the base of a transistor control. - answerThe amount of current flowing between the emitter and collector. When using a Zener diode, where should a fuse be placed for circuit protection? - answerAfter the Zener diode Where does the arrow point in a bi polar transistor? - answerToward the N type material What is Zener voltage? - answerThe diode's voltage threshold. Also known as avalanche voltage. What is MOST 50? - answerCarried over UTP or unshielded twisted pa contains one pair of twisted wires for input and a second pair for output. The pairs have a different teist rate. Max speed is 50 M baud and 1024 bits. What is SAE1979 and ISO15031-5 - answerSpecifies a set of standard messages that can be used by scan tools to obtain OBD II data from a vehicle. What is synchronous? - answerData signals that are constant, meaning the signal never astops as long as the computers are active. What is MOST 150 - answer150 M baud and 3072 bits Enables an ethernet channel in addition to the control message channel, streaming data channel and packet data channel. What does P stand for in an OBD II diagnostic code? - answerPowertrain What does the power supply of a mobile amplifier do? - answerSwitches battery voltage to a higher rail voltage What is a NOT gate - answerThe output is opposite of the input. If the input is TRUE then the output is FALSE. What are the seven basic logic gates - answerAND OR XOR NOT NAND NOR XNOR What is a MOSFET and what are its parts? - answerMetal Oxide Semiconductor Field Effect Transistor 1 Gate 2 Source 3 Drain What is needed to work around a Hybrid vehicles Orange covered wiring? - answerInsulated Class 0 electrical linemans gloves What is OBD II and what does it do? - answerSecond generation On Board Diagnostics created in 1996 to provide technicisns eith a universal set of basic fiagnodtic capabilities. What is hole flow? - answerThe opposite direction of electron flow. Are electrons positively or negatively charged? - answerNegatively What is a Zener Diode and what is its function? - answerA special kind of diode based on the initial work of Dr. Carl Zener in 1934. It functions as a voltage regulator when reverse biased. What is Pin 2 of the OBD II - answerJ1850 Bus+ (VPW and PWM) What is Pin 4 of the OBD II - answerChassis Ground What is Pin 5 of the OBD II - answerSignal Ground What is Pin 6 of the OBD II - answerCan High (J-2284) What is Pin 7 of the OBD II - answerISO9141-2 K Line of KWP What is Pin 10 of the OBD II - answerJ1850 Bus (PWM only) What is Pin 14 of the OBD II - answerCan Low (J-2284) What is Pin 15 of the OBD II - answerISO 9141-2L Line or KWP What is Pin 16 of the OBD II - answerBattery Power