UPDATED MICHIGAN ENGINE REPAIR MECHANIC STUDY QUESTIONS AND 100% CORRECT ANSWERS

UPDATED MICHIGAN ENGINE REPAIR MECHANIC STUDY QUESTIONS AND 100% CORRECT ANSWERS “Winter blend gasoline ________. can cause engine driveability problems if used during warm weather. has a higher RVP. vaporizes more easily than summer blend gasoline. All of the above. - CORRECT ANSWER All of the above" "Vapor lock can occur ________. as a result of excessive heat near fuel lines. if a fuel line is restricted. during both A and B. during neither A nor B. - CORRECT ANSWER during both A and B." "E85 means that the fuel is made from ________. pure ethyl alcohol ethanol that has 15% water 85% gasoline, 15% ethanol 85% ethanol, 15% gasoline - CORRECT ANSWER 85% ethanol, 15% gasoline" "A flex-fuel vehicle can be identified by ________. VIN VECI emblems on the side, front, and/or rear of the vehicle Any of the above - CORRECT ANSWER Any of the above" "Coil polarity is determined by the ________. direction of lamination turns ratio direction of the coil windings saturation direction - CORRECT ANSWER direction of the coil windings" "How does a waste-spark ignition system fire the spark plugs? The polarity reverses at each firing (flip flops) The same plug always is fired straight or reverse polarity The waste spark is sent to the cylinder next to the cylinder being fired Both A and C - CORRECT ANSWER The same plug always is fired straight or reverse polarity" "The pulse generator ________. fires the spark plug directly signals the computer that fires the spark plug directly is used as a tachometer reference signal by the computer and has no other function signals the electronic control unit (module) - CORRECT ANSWER signals the electronic control unit (module)" "Two technicians are discussing distributor ignition. Technician A says that the pickup coil in the distributor is used to pulse the ignition module (igniter). Technician B says that some distributor ignition systems use a Hall-effect system. Which technician is correct? - CORRECT ANSWER Both technicians" "Technician A says that a two-wire COP system uses the PCM to trigger the coil. Technician B says that a three-wire COP system has an ignition module built into the coil assembly. Which technician is correct? - CORRECT ANSWER Both technicians" "The ignition system is usually divided into ________ different sections four one three two - CORRECT ANSWER two" "What unit of electricity is used as a signal for a computer? Watt Ohm Ampere Volt - CORRECT ANSWER Volt" "The four basic computer functions include ________. data gathering, processing, output, and evaluation input, processing, storage, and output sensing, calculating, actuating, and processing writing, processing, printing, and remembering - CORRECT ANSWER input, processing, storage, and output" "Computer speed is measured in ________. clock speed (Hz) bytes baud rate voltage - CORRECT ANSWER clock speed (Hz)" "The ratio of on time relative to the period of the complete cycle is the ________. amplitude frequency duty cycle pulse width modulation - CORRECT ANSWER duty cycle" "Which computer function is defined as a voltage signal from a sensor or switch? Process Input Storage Output - CORRECT ANSWER Input" "Which term describes the process of manually adjusting variables such as speed, load, and spark timing to determine the optimum output settings for the computer? Engine mapping Reflashing Performance programming Signal conditioning - CORRECT ANSWER Engine mapping" "Which sensor is used to measure manifold vacuum? RPM ECT MAP TP - CORRECT ANSWER MAP" "Which term describes the speed of data transmission? Frequency Baud rate Pulse width modulation Oscillator speed - CORRECT ANSWER Baud rate" "The sensor that measures the temperature of the air being drawn into the engine is called a(n) ________. IAT NTC thermistor PTC thermistor Both A and B - CORRECT ANSWER Both A and B" "What type of sensor is used to measure the position of the throttle? Potentiometer Engine speed (RPM) Positive temperature coefficient (PTC) thermistor Negative temperature coefficient (NTC) thermistor - CORRECT ANSWER Engine speed (RPM)" "Typical TP sensor voltage at idle is about ________. 1.5 to 2.8 volts 2.5 to 2.8 volts 0.5 volt or 10% of WOT sensor voltage 13.5 to 15.0 volts - CORRECT ANSWER 0.5 volt or 10% of WOT sensor voltage" "Most TP sensors have how many wires? 1 2 3 4 - CORRECT ANSWER 3" "Which of these sensors does the TP sensor back up if the PCM determines that a failure has occurred? Oxygen sensor MAF sensor MAP sensor Either B or C - CORRECT ANSWER MAF sensor" "Which of these tools would be used to test a MAP sensor? A test light A vacuum simulator A digital voltmeter A jumper wire - CORRECT ANSWER A digital voltmeter" "When the engine is at idle speed, manifold vacuum is ________. high (17 to 21 in. Hg) low (1 to 4 in. Hg) fluctuating from 8 to 10 in. Hg zero - CORRECT ANSWER high (17 to 21 in. Hg)" "When measuring the output signal of a MAP sensor on a General Motors vehicle, the digital multimeter should be set to read ________. DC volts frequency in Hz DC amperes AC volts - CORRECT ANSWER DC volts" "The output of a MAP sensor is reading 1.0 volt. What is the approximate engine vacuum in inches of mercury (Hg)? 5 10-15 0 17-21 - CORRECT ANSWER 17-21" "A scan tool can be used to test a MAP sensor by monitoring the injector pulse width (in milliseconds) while ________ is being applied to the MAP sensor air pressure voltage ground vacuum - CORRECT ANSWER vacuum" "The MAP sensor is used by the PCM to diagnose the ________ system. AC O2 sensor EGR Injector - CORRECT ANSWER EGR" "A fuel injection system that does not use a sensor to measure the amount (or mass) of air entering the engine is usually called a(n) ________ type of system speed density mass air flow hot wire air vane controlled - CORRECT ANSWER speed density" "Which type of sensor uses a burn-off circuit? Hot film MAF sensor Hot wire MAF sensor Vane type airflow sensor Both A and B - CORRECT ANSWER Hot wire MAF sensor" "A high O2S voltage could be due to a ________. rich exhaust lean exhaust defective spark plug wire Both A and C - CORRECT ANSWER rich exhaust" "A low O2S voltage could be due to a ________. rich exhaust defective spark plug wire lean exhaust Both B and C - CORRECT ANSWER rich exhaust, defective spark plug wire" "An oxygen sensor is being tested using a digital storage oscilloscope (DSO). A good oxygen sensor should display how many switches per second? 15-20 1-5 5-10 10-15 - CORRECT ANSWER 1-5" "A wide band oxygen sensor is capable of detecting the air-fuel mixture in the exhaust from ________ (rich) to ________ (lean). 12:1; 15:1 13:1; 16.7:1 8:1; 18:1 10:1; 23:1 - CORRECT ANSWER 10:1; 23:1" "The oxygen sensor signal is used by the PCM to ________ the air-fuel mixture. dampen add fuel to fine-tune add air to - CORRECT ANSWER fine-tune" "A wide-band oxygen sensor has an internally damaged heater circuit. What could this cause? Could cause the engine to run in open loop only The oxygen sensor will leak air into the exhaust manifold It may not set a DTC Could cause the engine to run rich - CORRECT ANSWER It may not set a DTC" "A wide band oxygen sensor needs to be heated to what operating temperature? 1,400 deg. F 800 deg. F 2,000 deg. F 600 deg. F - CORRECT ANSWER 1,400 deg. F" "Where is sensor 1, bank 1 located on a V-type engine? On the same bank where number 1 cylinder is located Before the catalytic converter On the bank opposite cylinder number 1 Both A and B - CORRECT ANSWER On the same bank where number 1, cylinder is located Before the catalytic converter" "You have checked the crankshaft and found the following measurements below the rod journal surfaces are smooth no rod journal taper is present - CORRECT ANSWER Install standard bearings in all rods" "You have measured all the cylinders and obtained the measurements given below all the cylinders are smooth and the pistons are reusable what should the mechanic do? - CORRECT ANSWER Deglaze the pistons use original pistons and new standard rings" "Crank shaft end play can be checked with - CORRECT ANSWER A dial indicator" "The picture below shows a mechanic measuring - CORRECT ANSWER Valve guide end wear" "You are performing a compression test which one of these are true - CORRECT ANSWER The throttle and choke must be opened fully" "Which one of the following is a sad grade 5 bolt - CORRECT ANSWER C - the 3 lines on the bolt" "CYLINDER DIAMETER IS IMPORTANT WHEN DETERMINING RING END GAP. AS A RULE OF THUMB, A 3 INCH BORE WOULD REQUIRE A RING END GAP OF APPROXIMATELY: - CORRECT ANSWER .009 .0012" "Cylinder rings should be checked for fit - CORRECT ANSWER Both a and b" "When putting a engine together you would use short pieces of the hose to protect the - CORRECT ANSWER Rod journals" "Which one of the following will cause oil consumption - CORRECT ANSWER EXCESSIVE MAIN BEARING CLEARANCE." "Before installing the pistons in a newly honed cast iron block you should clean the bores with - CORRECT ANSWER Soap and warm water" "Pistons for a v6 engine are generally - CORRECT ANSWER Interchangeable from one cylinder bank to the other" "To much crank case blow by is likely caused by - CORRECT ANSWER Worn piston rings" "Which of the following will not be affected when free placing pistons 1 and 2 - CORRECT ANSWER Engine timing" "A MECHANIC IS CHECKING MAIN BEARING CLEARANCE WITH PLASTIGAGE. IF THE PLASTIGAGE FLATTENS MORE AT ONE END THAN THE OTHER, IT WOULD INDICATE: - CORRECT ANSWER The rod is bent" "After matching the cylinders you would hone the bores too - CORRECT ANSWER Produce a proper size with a cross hatch finish" "How can excessive camshaft lube wear be determined without removing the cam from the engine - CORRECT ANSWER Remove the rocker cover and measure the push rod travel on each cylinder" "During a manifold vacuum test the vacuum gage needle a steady 12 inches at idle - CORRECT ANSWER Late timing" "PISTON RINGS SHOULD BE INSTALLED SO THAT THE TRADEMARKS OR DOTS: - CORRECT ANSWER Face the top of the piston" "The bearing insert below has been plastigated what can you determine by the picture - CORRECT ANSWER Journal taper is present" "A bore gauge is used to measure - CORRECT ANSWER Taper in the cylinders" "What must be done if the camshaft is worn beyond specifications - CORRECT ANSWER Both A and B" "YOU HAVE REFACED A VALVE AND RECUT THE VALVE SEAT IN THE HEAD. WHAT IS THE PROPER WAY TO COMPENSATE FOR THE CHANGE IN VALVE SPRING HEIGHT? - CORRECT ANSWER Add a shim under the valve spring" "Some manufactures recommend removing a transverse mounted engine - CORRECT ANSWER Axle shafts" "AN ENGINE HAS A LARGE BUILD-UP OF SLUDGE IN THE CRANKCASE. WHAT WOULD CAUSE THIS PROBLEM? - CORRECT ANSWER Leaking cam bearings" "A TURBO-CHARGED VEHICLE IS LOW ON POWER. WHICH OF THE FOLLOWING WOULD CAUSE THIS PROBLEM? - CORRECT ANSWER All of the above" "When performing a cylinder leak edge test you find air flow out the throttle body what's this indicate? - CORRECT ANSWER Leaking piston rings" "Which of the following is the proper way to install camshaft bearings - CORRECT ANSWER Drive them into place with a camshaft bearing driver" "Which of the following is not a recommended break in practice for an over hauled engine - CORRECT ANSWER Run the engine at idle with no load for the first few hours" "After cleaning the ring grooves of a piston you then should check the top ring groove for wea. What do you measure this with - CORRECT ANSWER A feeler gauge and a new piston ring" "Technician A says that spark knock, ping, and detonation are different names for abnormal combustion. Technician B says that any abnormal combustion raises the temperature and pressure inside the combustion chamber and can cause severe engine damage. Which technician is correct? - CORRECT ANSWER Both technicians" "Technician A says that the research octane number is higher than the motor octane number. Technician B says that the octane rating posted on fuel pumps is an average of the two ratings. Which technician is correct? - CORRECT ANSWER Both technicians" "Technician A says that in going to high altitudes, engines produce lower power. Technician B says that most engine control systems can compensate the air-fuel mixture for changes in altitude. Which technician is correct? - CORRECT ANSWER Both technicians" "What can be used to measure the alcohol content in gasoline? Electronic Tester Graduated cylinder Scan tool Either A or B - CORRECT ANSWER Either A or B" "The gasoline burned inside the internal combustion engine is a type of ________. hydrocarbon alcohol carbon monoxide compressed vapor - CORRECT ANSWER hydrocarbon" "Avoid topping off the fuel tank because ________. the extra fuel simply spills onto the ground. the extra fuel goes into the expansion area of the tank and is not used by the engine. it can saturate the charcoal canister. the extra fuel increases vehicle weight and reduces performance. - CORRECT ANSWER it can saturate the charcoal canister" "Using ethanol-enhanced or reformulated gasoline can result in ________. the same fuel economy compared to using 100% gasoline. improved fuel economy compared to using 100% gasoline. reduced fuel economy compared to using 100% gasoline. higher or lower fuel economy, depending on the size of the engine. - CORRECT ANSWER reduced fuel economy compared to using 100% gasoline." "Pump octane is rated by ________. research octane only an average of these two methods motor octane only None of these - CORRECT ANSWER an average of these two methods" "Ethanol can be produced from what products? Sugarcane Switchgrass Corn Any of the above - CORRECT ANSWER Any of the above" "Which alcohol is dangerous (toxic)? Ethanol Neither ethanol nor methanol Both ethanol and methanol Methanol - CORRECT ANSWER Methanol" "Which is the most widely used alternative fuel? M85 Propane E85 CNG - CORRECT ANSWER Propane" "Liquefied petroleum gas (LPG) is also called ________. Propane E85 P-series fuel M85 - CORRECT ANSWER Propane" "What personal protective equipment should be worn when working with alternative fuels? Long sleeve shirt and long pants Safety glasses Gloves All of the above - CORRECT ANSWER All of the above" "Technician A says the stoichiometric ratio for gasoline is about 9.0:1. Technician B says the stoichiometric ratio for ethanol is about 9.0:1. Which technician is correct? - CORRECT ANSWER Technician B only" "Using an ethanol-enhanced or reformulated gasoline can result in reduced fuel economy. True False - CORRECT ANSWER True" "Of the alternative fuels listed in the text, which has the highest octane? Methanol Propane CNG Ethanol - CORRECT ANSWER CNG" "The primary (low-voltage) ignition system must be working correctly before any spark occurs from a coil. Which component is NOT in the primary ignition circuit? Ignition switch Ignition module Spark plug wires Pick up coil - CORRECT ANSWER Spark plug wires" "The ignition module has direct control over the firing of the coil(s) of an EI system. Which component(s) triggers (controls) the module? Computer Pickup coil Crankshaft sensor All of the above - CORRECT ANSWER All of the above" "A reluctor is a ________. notched ring or pointed wheel type of sensor used in the secondary circuit type of Hall-effect sensor type of optical sensor - CORRECT ANSWER notched ring or pointed wheel" "HEI and EIS are examples of ________. distributor ignition systems waste-spark systems pickup coil types coil-on-plug systems - CORRECT ANSWER distributor ignition systems" "A spark tester should be used to check for spark because ________. it can detect the gap of the spark plugs it is connected to the CKP sensor to check its output a spark tester requires at least 25,000 volts to fire it can detect a cracked spark plug - CORRECT ANSWER a spark tester requires at least 25,000 volts to fire" "Poor engine performance could be the result of a ________. distributor ignition with the CMP and CKP not correctly indexed defective coil a high-voltage spark leak Any of the above - CORRECT ANSWER Any of the above" "Typical primary coil resistance specifications usually range from ________ ohms less than 1 to 3 6,000 to 30,000 500 to 1500 100 to 450 - CORRECT ANSWER less than 1 to 3" "Typical secondary coil resistance specifications usually range from ________ ohms 6,000 to 30,000 1 to 3 100 to 450 500 to 1500 - CORRECT ANSWER 6,000 to 30,000" "What should be inspected as part of a visual inspection of the ignition system? Spark plug gap Coil polarity Spark plug wires for proper routing All of the above - CORRECT ANSWER Spark plug wires for proper routing" "What part of the scope pattern show the duration of the spark? Dwell section Firing line Intermediate section Spark line - CORRECT ANSWER Spark line" "Which can be used to test for a fault with a cylinder on a waste-spark system? Using short sections of rubber hose attached to the coil terminals An LED test light Using a timing light to check for spark Any of the above - CORRECT ANSWER Using short sections of rubber hose attached to the coil terminals" "As engine speed increases, the timing of the spark in the cylinder must be ________, maintained the same retarded slightly set at 10 degrees BTDC advanced - CORRECT ANSWER advanced" "Which sensor produces a square waveform? Magnetic sensor Pickup coil Hall-Effect sensor Both B and C - CORRECT ANSWER Hall-Effect sensor" "Which of these components sends a pulse signal to an electronic ignition module? Resistor Pickup coil Coil wire Ignition coil - CORRECT ANSWER Pickup coil" "Refer to this diagram of a fuel pump control circuit. What type of a driver circuit is used in this circuit? High-side driver circuit PWM driver circuit Low-side driver circuit Duty cycle driver circuit - CORRECT ANSWER Low-side driver circuit" "A fuel injector can be an input or an output component True False - CORRECT ANSWER False" "The sensor that most determines fuel delivery when a fuel injected engine is first started is the ________. IAT sensor ECT sensor Engine MAP sensor O2S - CORRECT ANSWER ECT sensor" "An engine fuel temperature (EFT) sensor is used on some vehicles, since fuel temperature changes the ________ of the fuel. octane rating color density pressure - CORRECT ANSWER density" "When testing an ECT sensor on a vehicle, a digital multimeter can be used and the signal wires back probed. What setting should the technician use to test the sensor? Ohms DC volts Hz (hertz) AC volts - CORRECT ANSWER DC volts" "When testing the ECT sensor with the connector disconnected, the technician should select what position on the DMM? AC volts Hz (hertz) DC volts Ohms - CORRECT ANSWER Ohms" "When checking the ECT sensor with a scan tool, about what temperature should be displayed if the connector is removed from the sensor with the key on, engine off? 230°F (110°C) 120°F (50°C) -40°F (-40°C) 284°F (140°C) - CORRECT ANSWER -40°F (-40°C)" "A typical IAT or ECT sensor reads about 3000 ohms when tested using a DMM. This resistance represents a temperature of about ________. 284° F (140°C) -40° F (-40°C) 70° F (20°C) 120° F (50°C) - CORRECT ANSWER 70° F (20°C)" "If the transmission fluid temperature (TFT) sensor indicates cold automatic transmission fluid, what would the PCM do to the shifts? Disable torque converter clutch; normal shift points Normal shifts but overdrive will be disabled Delayed shift points and torque converter clutch disabled Normal shifts and normal operation of the torque converter clutch - CORRECT ANSWER Delayed shift points and torque converter clutch disabled" "What happens to the voltage measured at the ECT sensor when the thermostat opens? Decreases about 1 volt Increases slightly Decreases slightly Increases about 1 volt - CORRECT ANSWER Increases slightly" "All of the following are approved methods or tools used when diagnosing an ECT (engine coolant temperature) sensor EXCEPT ________. digital multimeter (DMM) substituting a variable resistor scan tool observing resistance values at a specified temperature - CORRECT ANSWER substituting a variable resistor" "Which wire on a typical TP sensor should back-probed to check the voltage signal to the PCM? Ground wire Signal wire Meter should be connected between 5-volt reference and ground 5-volt reference (Vref) - CORRECT ANSWER Signal wire" "After a TP sensor has been tested using the min/max function on a DMM, a reading of zero volts is displayed. What does this reading indicate? The TP sensor is open at one point during the test The TP sensor signal is shorted to 5-volt reference The TP sensor is shorted Both B and C are possible - CORRECT ANSWER The TP sensor is open at one point during the test" "The TP sensor affects the operation of all of these, EXCEPT ________. air-conditioning compressor clutch operation correcting for rich and lean air-fuel mixtures torque converter clutch operation clear flood mode operation - CORRECT ANSWER correcting for rich and lean air-fuel mixtures" "A typical TP sensor registers about how many volts at WOT (wide open throttle)? 13-15 1.3-3.0 4.5 0.5 - CORRECT ANSWER 4.5" "The third terminal of a potentiometer is attached to a movable contact that slides across the resistor to vary ________. vacuum signal voltage spark voltage cable tension - CORRECT ANSWER signal voltage" "What voltage will be measured at terminal "C" as shown? 12 volts 0.5 volts 4.5 volts Not enough information - CORRECT ANSWER 0.5 volts" "As the load on an engine increases, manifold vacuum decreases and the manifold absolute pressure ________. remains constant (absolute) increases decreases changes with barometric pressure only (altitude or weather) - CORRECT ANSWER increases" "A typical MAP sensor compares the vacuum in the intake manifold to ________. the value of the IAT sensor a perfect vacuum atmospheric pressure barometric pressure - CORRECT ANSWER a perfect vacuum" "As the altitude of the vehicle increases, BARO voltage ________. increases decreases does not change Either B or C, depending on the vehicle - CORRECT ANSWER decreases" "Which of these is NOT a purpose or function of the MAP sensor? Helps diagnose the EGR system Measures the load on the engine Calculates fuel delivery based on altitude Measures engine speed - CORRECT ANSWER Measures engine speed" "The MAF sensor is used mostly to determine the amount of ________ to deliver to the engine. fuel spark advance idle air vacuum correction - CORRECT ANSWER idle air" "If the MAF sensor fails, the PCM uses ________ to calculate fuel delivery needs. RPM alone RPM and throttle position throttle position and transmission RPM MAP and throttle position - CORRECT ANSWER RPM and throttle position" "Air that enters the engine without passing through the air flow sensor is called ________. dirty air false air bypass air measured air - CORRECT ANSWER false air" "Which of the following components measures the volume and density of the incoming air? Mass Air Flow Sensor Throttle Position Sensor Manifold Absolute Pressure Sensor Oxygen Sensor - CORRECT ANSWER Mass Air Flow Sensor" "What are the two methods of sensing incoming engine air flow? Mass air flow and air intake Speed density and mass air flow Speed density and throttle position EGR and positive crankcase ventilation - CORRECT ANSWER Speed density and mass air flow" "Which of these can be used to measure the frequency (Hz) output of the MAF sensor and compare the reading with specifications? DMM (digital multimeter) Megohmmeter High impedance test light Logic Probe - CORRECT ANSWER DMM (digital multimeter)" "MAF sensor electrical connectors should be checked for all of these, EXCEPT ________. over-tight connectors terminals bent or pushed out of the plastic connector frayed wiring corrosion - CORRECT ANSWER over-tight connectors" "A vehicle runs fine when in reverse yet has a rough idle and stalling when put in drive. This could be caused by ________. incorrect idle speed a missing spark plug excessive fuel pressure a cracked air inlet hose - CORRECT ANSWER a cracked air inlet hose" "The voltage output of a zirconia oxygen sensor when the exhaust stream is lean (excess oxygen) is ________. about in the middle of the voltage range relatively high (close to 1 volt) relatively low (close to 0 volt) Either A or B, depending on atmospheric pressure - CORRECT ANSWER relatively low (close to 0 volt)" "What does the post, or downstream, oxygen sensor (HO2S) measure? Amount of oxygen in front of the catalytic converter Amount of H2O in front of the catalytic converter Amount of oxygen behind the catalytic converter Amount of H2O behind the catalytic converter - CORRECT ANSWER Amount of oxygen behind the catalytic converter" Which of the following is true about adjusting valve tappet clearance - CORRECT ANSWER IT SHOULD HE ADJUSTED AT TDC AT THE END OF THE COMPRESSION STOKE" "THE HYDRAULIC LIFTERS ARE NOISY AT HIGHWAY SPEEDS BUT QUIET AT LOW SPEEDS. WHAT SHOULD YOU DO FIRST AS YOU DIAGNOSE THIS PROBLEM? - CORRECT ANSWER Check crank case oil level" "The valve timing on most engines is controlled by - CORRECT ANSWER A belt chain or gear drive" "THE BEARING INSERTS BELOW HAVE BEEN PLASTIGAGED. WHAT CAN YOU DETERMINE ABOUT THESE PICTURES? - CORRECT ANSWER Na" "The compression test has showed that the middle two cylinders on one side of the v8 engine had readings of 50psi the other cylinders had readings of 135psi and 140 psi what is the likely cause of this condition - CORRECT ANSWER A blown head gasket" "EXCESSIVELY WORN VALVE GUIDES: - CORRECT ANSWER ALL OF THE ABOVE" "INTAKE VALVE DEPOSITS, AS SHOWN BELOW: - CORRECT ANSWER BOTH B AND C" "WHAT IS BEING CHECKED ON VALVE SPRING in the illustration below - CORRECT ANSWER A. INSTALLED HEIGHT" "YOU ARE USING A VACUUM GAGE CONNECTED to the intake manifold which of the following is true - CORRECT ANSWER When the engine is rapidly accelerated the needle will rise with the reading" "What are the minimum and maximum measurements of a shaft given 2.125 plus or minus .015 - CORRECT ANSWER 2.110-2.140" "The mechanic has determined that no fuel squirts in the carburetor when the throttle is opened quickly what's the problem? - CORRECT ANSWER ALL OF THE ABOVE" "A WARM ENGINE HAS LOW OIL PRESSURE. THE MOST LIKELY CAUSE OF THE LOW OIL PRESSURE IS: - CORRECT ANSWER A. LEAKY MAIN BEARING SEALS." "What is the reading of 01 inch on the micrometer below - CORRECT ANSWER 5.750" "YOU ARE REINSTALLING PISTONS WITH NEW RINGS. THE RING COMPRESSOR WILL NOT FIT TIGHT AROUND A PISTON SKIRT AND THE RINGS BIND ON THE BLOCK SURFACE. WHAT SHOULD YOU DO? - CORRECT ANSWER Check the ring end gap" "REFER TO THE MANUFACTURER'S SPECIFICATIONS IN THE IMAGE. YOU COULD FIND THE AMOUNT OF BORE TAPER BY: - CORRECT ANSWER " "Valve taper clearance on running engine with Hydraulic lifters is .012 to .014 - CORRECT ANSWER .006 to .008" "What is the purpose of valve taper clearance - CORRECT ANSWER To compensate for temperature change and valve train wear" "WITH THE RADIATOR CAP REMOVED AND THE ENGINE WARMED UP AND RUNNING, YOU CAN SEE BUBBLES IN THE COOLANT. WHAT WOULD LIKELY CAUSE THIS TO HAPPEN? - CORRECT ANSWER The head gasket is leaking" "You've finished grinding a exhaust valve what should the margin be - CORRECT ANSWER .001 .003" "THE CAR HAS A WATER PUMP MOUNTED FAN. YOU NOTICE THAT THE FAN BLADE TIPS MOVE BETWEEN ONE-EIGHT AND ONE QUARTER INCH BACK AND FORTH. WHAT DOES THIS INDICATE? - CORRECT ANSWER A badly worn water pump bearing" "The best time to check for crank shaft end play is - CORRECT ANSWER torquing the main bearing caps"