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52 Cards in this Set

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