DUASO TEST 6 - keys, keyway and coupling.

ELASTIC MATERIAL BUSHED COUPLING

A TYPE OF COUPLING THAT ALLOWS SLIGHT AMOUNT OF TORSIONAL ANGULAR FLEXIBILITY DUE TO INTRODUCTION WITH SOME ELASTIC MATERIAL CYLINDRICALLY WRAPPED AROUND THE BOLTS IN THE FLANGE.

GIB-HEAD KEYS

WHICH OF THE FOLLWING KEYS THAT IS SQUARE OR FLAT AND TAPERED WITH HEAD?

FLAT KEYS AND SQUARE KEYS

WHAT ARE CONSIDERED AS THE MOST COMMON KEYS

PIN KEY

A KEY MAY EITHER STRAIGHT OR TAPERED. IT USUALLY A DRIVE FIT.

ROLL PIN

A KEY WITH OF THE SEVERAL PATENTED METHODS OF KEYED INTO A HOLE THAT IS SMALL ENOUGH TO CLOSE THE SLIT, ASSEMBLED IN RADIAL DIRECTION.

TANGENTIAL KEYS

KENNEDY KEYS ARE ALSO KNOWN AS?

FEATHER KEY

A KEY SHAFT THAT ALLOWS THE HUB TO MOVE ALONG THE SHAFT BUT PERVENTS THE ROTATION OF THE SHAFT

CLOSE FIT, PRESS FIT, SLIDING FIT

WHICH OF THE FOLLOWING TYPE OF FITS USE FOR INVOLUTE SPLINES?

INVOLUTE SERRATIONS

USED FOR PERMANENT FITS AND ARE SIMILAR TO INVOLTE SPLINES EXCEPT THAT THE PRESSURE ANGLE IS 14.5 DEG.

DOUBLE SHEAR

IN THE CASE OF KNUCKLE JOINT, THE PIN IS MOST LIKELY TO FAIL IN?

THE KEY IS CUT IN BOTH SHAFT AND HUB

IN CASE OF SUNK KEY,

AUTOMOBILES

SPLINED SHAFTS ARE GENERALLY FOR?

AXIAL RELATIVE MOTION BETWEEN SHAFT AND HUB IS NECESSARY

SPLINES ARE USED WHEN?

crown.

WHICH KEY NORMALLY USED IN WRISTWATCHES?

1.2d

IF A SQUARE KEY AND SHAFT ARE TO BE OF THE SAME MATERIAL AD OF EQUAL STRENGTH THE LENGTH OF KEY WOULD BE EQUAL TO?

WOODRUFF KEY

A TYPE OF KEY THAT IS USED IN SELF-ALIGNING MACHINE KEY MADE BY A SIDE MILLING CUTTER IN THE FORM OF A SEGMENT OF A DISK

KEY WEY

A FEMALE MATING MEMBER THAT FORMS A GROOVE IN THE SHAFT TO WHICH THE KEY FITS

KENNEDY KEY

A SQUARE TAPER KEY FITTED INTO A KEYWAY OF SQUARE SECTION AND DRIVEN FROM OPPOSITE ENDS OF THE HUB IS KNOWN AS?

KEY

A MACHINE MEMBER EMPLOYED AT THE INTERFACE OF A PAIR OF MATING MALE AND FEMALE CIRCULAR CROSS - SECTIONED MEMBERS TO PREVENT RELATIVE ANGULAR MOTION BETWEEN THESE MATING.

A SUNK

A FEATHER KEY IS ONE OF THE FOLLOWING TYPES OF?

SPLINES

PERMANENT KEYS MADE INTEGRAL WITH TH SHAFT AND FITTING INTO KEY WAYS BROACHED INTO THE MATING HUB

BARTH KEY

A TYPE OF SQUARE KEY WITH BOTTOM TWO CORNERS BEVELED IS CALLED?

1000 PSI

THE BEARING LOAD ON FEATHER KEYS SHOULD NOT EXCEED

90 DEG

THE TWO KEYS ARE ANGULARLY SPACED

120*

THE THREE KEYS ARE ANGULARLY SPACED?

1.7

THE PERMISSIBLE CRUSHING IS ABOUT ____ TIMES THE PERMISSION SHEAR STRESS

1.5D

PRACTICAL CONSIDERATIONS REQUIRED THAT THE HUB LENGTH SHOULD AT LEAST?

FOR THREE KEYS, A _____ PERCENT OVERLOAD OFTEN IS USED

15

CLEVIS PINS

A PIN THAT IS CYLINDRICAL IN SHAPE WITH A HEAD ON ONE END AND A RADIAL THROUGH HOLE IN THE OTHER END.

TAPER PINS

USED FOR THE ATTACHMENT OF LEVERS, WHEELS AND SIMILAR DEVICES ONTO SHAFT AND MAT

KEY WAY

THE KEY FITS INTO MATING GROOVES IN THE SHAFT AND MATING MEMBER IS CALLED?

SHEAR PIN

USED AS COUPLINGS, OR ADDITION TO OVERLOAD, WHERE THERE IS DANGER OR INJURY TO MACHINES OR TO

FLANGE COMPRESSION COUPLING

A COUPLING THAT TRANSMITS POWER VIA THE FRICTIONAL FORCES INDUCED BY PULLING THE FLANGES TOWARD EACH OTHER OVER SLOTTED TAPERED SLEEVES IS KNOWN AS?

FLEXIBLE COUPLING

WHAT IS USED FOR ABSORBING SOME SHOCK AND VIBRATIONS THAT MAY BE APPEAR ON ONE SHAFT AND OF PREVENTING THE OCCURENCE OF REVERSED STRESSES CAUSED BY THE SHAFT DEFELCTING AT THE COUPLING

15*

FOR A SINGLE HOOKE’S COUPLING THE SHAFT ANGLE SHOULD NOT BE GREATER THAN?

USED FOR NON-COLLINEAR SHAFTS

A UNIVERSAL COUPLING IS

USED FOR COLLINEAR SHAFTS

A FLANGE COUPLING IS?

KEY

IN FLANGE COUPLING THE WEAKEST ELEMENT SOULD BE THE?

SHEAR FORCES

IN FLANGE COUPLING, THE FLANGE BOLTS ARE DESIGNED FOR

A COUPLING

WHICH OF THE FOLLOWING MECHANICAL DEVICES IS USED FOR UNITING OR CONNECTING PARTS OF A MECHANICAL SYSTEM?

HYDRAULIC COUPLING

A COUPLING THAT EMPLYS A FLUID TO PROVIDE ANGULAR FLEXIBILITY BETWEEN THE INPUT AND OUTPPUT SHAFTS.

RIGID COUPLING

WHICH OF THE FOLLOWING TYPE OF COOUPLING IS USED WITH COLLINEAR SHAFTS?

OLDHAM COUPLING

WHICH OF THE FOLLOWING USED TO CONNECT SHAFTS THAT HAVE LATERAL MISALIGNMENT?

FALK COUPLING

A COUPLING THAT IS COMPOSED OF TWO SLOTTED MEMBERS, WHICH ARE CONNECTED BY A CONTINUOUS STEEL SPRING, AND LIES IN THE SLOTS.

TO PROVIDE FOR THE CONNECTION OF SHAFT OF UNITS THAT ARE MANUFACTURED SEPERATELY.

TO PROVIDE FOR MISALIGNMENT OF THE SHAFT.

TO REDUCE THE TRANSMISSION OF SHOCK LOADS FROM ONE SHAFT TO ANOTHER.

SHAFT COUPLINGS ARE USED IN MACHINERY FOR SEVERAL PURPOSES. THE MOST COMMONG PURPOSE OF SHAFT COUPLING IS?

1.25D AND 2.4D

TYPICAL HUB LENGTH FALLS BETWEEN _____ WHERE D IS THE SHAFT DIAMETER

1/4

THE DIAMETER OF THE LARGE END OF THE PIN SHOULD BE ____ THE SHAFT DIAMETER

SLIDING LATCH

THE MOST COMMON TYPE OF SLIDING ACTION FASTENER AND IS WIDELY USED ON DOORS IS THE?

1.7

WHEN THE KEY IS NOT FITTED ON ALL FOUR SIDES EXPERIENCE HAS SHOWN THAT, THE PERMISSIBLE CRUSHING STRESS IS ABOUT________TIMES THE PERMISSIBLE SHEAR STRESS.

COUPLING

TH MECHANICAL FASTENING THAT CONNECTS SHAFTS TOGETHER FOR POWER TRANSMISSION.

KEYED JOINTS

are made up of keys and keyway

key

is a machine element that is used to join a rotating machine element to a shaft.

a keyway on the shaft and a keyseat the rotating machine element.

for a key to function, there must be?

keyed joint

The key is then tightly fitted between the keyway and the keyseat, hence the mechanism is called a?

to make up keyed joints to secure the hub and shaft so that relative movement between a power transmitting shaft and attached component won’t occur.

The primary function of keys and keyways is?

TRUE

RUE OR FALSE.

to make up keyed joints to secure the hub and shaft so that relative movement between a power transmitting shaft and attached component won’t occur.

TRUE OR FALSE

A keyed joint often allows relative axial movement between the components. This key prevents relative rotation between the two parts and may enable torque transmission.

TRUE

A good example of a key and keyway application is?

gear drives, pulleys, or sprockets tightly connected with a key to the power transmitting shaft.