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52 Cards in this Set
- Front
- Back
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THE THREADED MOVABLE PART THAT ROTATES ON THE MICROMETER IS CALLED THE?
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THIMBLE
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TO CHECK CRANKSHAFT JOURNAL FOR TAPER OR OUT OF ROUND, THE JOURNAL SHOULD BE MEASURED IN AT LEAST HOW MANY LOCATIONS?
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6
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WHAT DEVISE IS USED TO MEASURE A TELESCOPIC GAUGE
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MICROMETER
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WHICH MEASURING GUAGE NEEDS TO BE SET UP TO A VIXED DIMENSION BEFORE USE?
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DIAL BORE GAUGE
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INTAKE CHARGE VELOCITY HAS TO BE HOW MANY FEET PER SECOND TO PREVENT FUEL DROPLET SEPERATION?
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50 FEET PER SECOND
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THE INTAKE MANIFOLD ON A PORT FUEL-INJECTED ENGINE CONTAINS WHAT?
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ONLY AIR
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WHAT KIND OF MANIFOLD HAS SUCCESSIVELY FIRING CYLINDERS AT DIFFERENT LEVELS?
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DUAL-PLANE INTAKE MANIFOLD
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A HEATED AIR INTAKE SYSTEM IS USUALLY NECESSARY FOR PROPER COLD ENGINE DRIVEABILITY EXCEPT ON WHAT?
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PORT FUEL-INJECTION SYSTEMS
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ANTOHER NAME FOR A HEAT RISER TYPE VALVE THAT DIRECTS EXHAUST UNDER THE CARBORATOR THROUGH A PASSAGE IN THE INTAKE MANIFOLD
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EARLY FUEL EVAPORATION VALVE
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WHATS THE PURPOSE OF THE SHEET METAL SHIELD USED ON THE LIVETER SIDE OF V TYPE INTAKE MANIFOLD?
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PREVENT THE OIL FROM BURNING ON THE EXHAUST CROSSOVER PASSAGE
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HEMISPHERICAL COMBUSTION CHAMBERS ARE TURBULANT OR NON TURBULANT
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NON TURBULANT
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WHAT IS THE SIZING OF THE INTAKE AND EXHAUST PORTS TO ENSURE PROPER ENGINE COOLING?
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SHORT EXHAUST PORTS AND LONG INTAKE PORTS
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THE GASKET SURFACE OF A CYLINDER HEAD THAT IS MEASURED WITH A STRAIGHTEDGE SHOULD HAVE A MAXIMUM VARIATION OF WHAT?
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.002 INCH IN ANY 6 INCH LENGHT , .004 INCH OVERALL
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HOW CAN A WARPED ALUMINUM CYLINDER HEAD BE RESTORED?
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PUT SHIMS UNDER EACH END, HEAT TO 500 DEGREES FOR 5 HRS, AND LET COOL, THEN MACHINING IT
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MOST VEHICLE MANUFACTURERS RECOMMENT REPAIRING INTEGRAL GUIDES USING WHAT?
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OS STEM VALVES (OVER SIZED)
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TYPICAL VAVLE STEM TO VALVE GUIDE CLEARANCE IS?
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.001 TO .004 INCH
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WHAT ENGINE COMPONENT MIGHT NEED TO BE MACHINIED IF THE CYLINDER HEADS ARE MACHINED ON A V TYPE ENGINE?
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INTAKE MANIFOLD
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A HIGHER MICROINCH FINISH MEASUREMENT INDICATES A WHAT KIND OF SURFACE?
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ROUGHER
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WHAT IS THE SQUISH AREA?
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-AREA AROUND COMBUSTION CHAMBER WHERE PISTON NEARLY CONTACTS CYLINDER
-CAUSES TURBULANCE |
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WHAT IS THE QUENCH AREA?
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ALSO THE SAME AS SQUISH AREA, AIR/FUEL MIXTURE IS COOLED BY THE CYLINDER HEAD TO REDUCE DETONATION
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WHERE IS THE BEST PLACE SPARK PLUG PLACEMENT?
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CENTER OF THE COMBUSTION CHAMBER
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WHAT IS SURFACE TO VOLUME RATIO?
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SURFACE AREA OF THE COMBUSTION CHAMBER DIVIDED BY THE VOLUME
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WHAT IS VALVE SHROUDING?
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VALVE IS KEPT CLOSE TO THE WALLS OF THE COMBUSTION CHAMBER TO HELP INCREASE MIXTURE TURBULANCE.
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WHAT DOES A CROSS FLOW HEAD DO?
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PROVIDES AN EASY PATH FROM INTAKE PORT THROUGH COMBUSTION CHAMBER TO EXHAUST PORT
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WHAT IS VALVE DURATION?
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NUMBER OF DEGREES BY WHICH THE CRANKSHAFT ROTATES WHEN THE VALVE IS OFF THE VALVE SEAT
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WHAT IS THE NORMAL LIFT OF A VALVE?
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25% OF THE VALVE HEAD DIAMETER
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HOW MANY PLANES SHOULD CYLINDER HEAD BE CHECKED FOR WARPAGE, DISTORTION, BEND, OR TWIST?
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5
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WHAT IS USED TO DISPLACE THE METAL AND DECREASE HOLE DIAMETER OF VALVE GUIDE?
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KNURLING
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WHAT CLOSES THE VALVES?
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SPRINGS
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THE FACE AND SEAT OF A VALVE WILL HAVE WHAT ANGLE?
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30 OR 45 DEGREES
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WHATS BIGGER, EXHAUST OR INTAKE VALVE HEADS, AND BY HOW MUCH?
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INTAKE VALVE HEADS ARE BIGGER AND THE EXHAUST VALVE HEAD IS ONLY 85% OF THE INTAKE ONE
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WHAT ARE THE TWO TYPES OF VALVE HEADS?
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RIGID AND ELASTIC
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WHAT IS VALVE RECESSION?
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THE WEARING AWAY OF THE SEAT, SO TAHT THE VALVE SEATS FURTHER INTO THE HEAD
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WHAT IS THERMAL SHOCK?
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RAPID INCREASE IN TEMPERATURE OF THE VALVE, MAY CAUSE RADIAL CRACKS IN THE VALVE
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WHAT IS VALVE STEM SCUFFING?
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THE VAVLE STEM TEMPORARILY WELDS TO THE GUIDE WHEN THE VALVE IS CLOSED. tHE WELD BREAKS AS TEH VALVE IS FORCED TO OPEN
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WHAT DOES A FLAT COILED DAMPER INSIDE A VALVE SPRING DO?
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ELIMINATES SPRING SURGE AND ADDS SOME VALVE SPRING TENSION
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WHAT IS VALVE FLOAT?
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VALVE CONTINUES TO STAY OPEN AFTER THE CAM LOBE HAS MOVED FROM UNDER THE LIFTER.
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WHAT RETAINS THE SPRING ON THE END OF THE VALVE STEM?
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VALVE KEEPER
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WHAT IS A VALVE ROTATOR AND WHAT ARE THE TWO TYPES?
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FREE ROTATOR- TAKE PRESSURE OF VALVE AND ALLOW ENGINE VIBRATION TO ROTATE
POSITIVE ROTATOR- USES EITHER STEEL BALLS OR COIL SPRING |
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WHAT IS THE MARGIN AND WHAT CAN AN INTAKE VALVE ONE BE TO PERFORM SATISFACTORILY?
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ITS THE SIDE OF THE VALVE HEAD, THE FLAT PART THATS PARALLEL TO THE VALVE STEM, IT CAN BE LESS THAN .030 IN
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FOR GOOD SERVICE LIFE, BOTH THE MARGIN AND THE OVERHANG SHOULD BE AT LEAST WHAT?
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1/32 INCH
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WHAT IS THE INTERFERENCE ANGLE?
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ANGLE BETWEEN VALVE FACE AND SEAT. MAKES A POSITIVE SEA AT TEH COMBUSTION CHAMBER EDGE OF THE SEAT WHEN THE ENGINE IS FIRST STARTED AFTER A VALVE JOB. USUALLY 1 DEGREEE LESS THAN THE SEAT ANGLE.
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HOW BIG ARE NORMAL AUTOMOTIVE SEATS?
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1/16 - 3/32 INCH
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A 60, 45, AND 30 DEGREE STONE DOES WHAT TO THE SEAT?
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60- RISE AND NARROW
45- WIDEN 30- LOWER AND NARROW |
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VALVE SEAT MUST BE CONCENTRIC WITHIN?
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.002 INCH
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WHAT ARE GENERALY ACCEPTED SEAT WIDTHS FOR ITNAKE AND EXHAUST VALVES?
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INTAKE- 1/16 INCH
EXHAUST- 3/32 INCH |
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HOW MUCH CAN THE VALVE STEM HEIGHT BE GROUND DOWN?
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.020 INCH
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WHAT DO VALVE SPRING INSERTS DO?
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RESTORE THE VALVE TO ITS PROPER INSTALLED HEIGHT
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WHAT VALVE STEM SEAL HOLDS TIGHTLY ON TEH VALVE STEM AND MOVES UP AND DOWN WITH THE VALVE?
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UMBRELLA VALVE STEM SEAL
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EXPLAIN POSITIVE VALVE STEM SEALS
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HOLD TIGHTLY AROUND TEH VALVE GUIDE, VALVE STEM MOVES THROUGH THE SEAL, WHICH WIPES THE EXCESS OIL FROM THE VALVE STEM
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WHERE DO THE CLOSE WOUND COILS GO TOWARD ON A VARIABLE PITCH VALVE SPRING?
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TOWARD THE CYLINDER HEAD
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A VALVE SHOULD BE DISCARED IF THE MARGIN IS LESS THAN WHAT AFTER REFACING?
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.025 INCH
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