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4

The relation between the pitch of the chain (p) and pitch circle diameter of the sprocket (D) is given by (where T = Number of teeth on the sprocket)

A. p = D sin (90°/T)

B. p = D sin (120°/T)

C. p = D sin (180°/T)

D. p = D sin (360°/T)

Correct Answer :

C. p = D sin (180°/T)


Related Questions

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4

A locking device extensively used in marine type connecting rod ends is a

A. Jam nut

B. Castle nut

C. Sawn nut

D. Ring nut

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4

A double strap butt joint (with equal straps) is

A. Always in single shear

B. Always in double shear

C. Either in single shear or double shear

D. Any one of these

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4

Buttress threads are usually found on

A. Screw cutting lathes

B. Feed mechanisms

C. Spindles of bench vices

D. Railway carriage couplings

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4

When a nut is tightened by placing a washer below it, the bolt will be subjected to following type of loads

A. Compression

B. Tension

C. Shear

D. Combined loads

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4

In a journal bearing, the load on the bearing is __________ to the axis of the journal.

A. Parallel

B. Perpendicular

C. Both A and B

D. None of these

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4

Eulers formula for a mild steel column is not valid if the slenderness ratio is

A. 90

B. 60

C. 120

D. 100

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4

The relation between the pitch of the chain (p) and pitch circle diameter of the sprocket (D) is given by (where T = Number of teeth on the sprocket)

A. p = D sin (90°/T)

B. p = D sin (120°/T)

C. p = D sin (180°/T)

D. p = D sin (360°/T)

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4

Which of the following property is essential for spring materials?

A. Stiffness

B. Ductility

C. Resilience

D. Plasticity

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4

If P1 and P2 are the tight and slack side tensions in the belt, then the initial tension Pi (neglecting centrifugal tension) will be equal to

A. P1 - P2

B. P1 + P2

C. 2 × (P1 + P2)

D. [2 × (P1 + P2)] + Pc Where Pc is centrifugal tension

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4

When a closely coiled helical spring is subjected to a couple about its axis, the stress induced in the wire material of the spring is

A. Bending stress only

B. A combination of torsional shear stress and bending

C. Direct shear stress only

D. A combination of bending stress and direct shear stress

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4

Which of the following material has the maximum ductility?

A. Copper

B. Mild steel

C. Aluminium

D. Zinc

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4

For a square key made of mild steel, the shear and crushing strength are related as

A. Shear strength is equal to crushing strength

B. Shear strength is greater than crushing strength

C. Shear strength is less than crushing strength

D. None of the above

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4

In a marine flange coupling, the thickness of flange is taken as

A. d/2

B. d/3

C. 3d/4

D. d/4

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4

The toughness of a material _________ when it is heated

A. Does not change

B. Increases

C. Decreases

D. None of the Above

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4

The product of the diametral pitch and circular pitch is equal to

A. 1

B. 1/π

C. π

D. π × number of teeth

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4

The face of the tooth is the

A. Surface of the top of the tooth

B. Surface of the tooth above the pitch surface

C. Surface of the tooth below the pitch surface

D. Width of the tooth measured along the pitch circle

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4

The acme threads are usually found on

A. Spindles of bench vices

B. Railway carriage couplings

C. Feed mechanism of machine tools

D. Screw cutting lathes

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4

The size of a gear is usually specified by

A. Pressure angle

B. Pitch circle diameter

C. Circular pitch

D. Diametral pitch

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4

When a bolt is subjected to shock loading, the resilience of the bolt should be considered in order to prevent breakage at the

A. Thread

B. Middle

C. Shank

D. Head

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4

When the fulcrum is in between the load and effort, the lever is said to be of

A. First type

B. Second type

C. Third type

D. Any one of these

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4

Set screws are

A. Similar to small size tap bolts except that a greater variety of shapes of heads are available

B. Slotted for a screw driver and generally used with a nut

C. Used to prevent relative motion between parts

D. Similar to stud

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4

The difference between the tooth space and the tooth thickness as measured on the pitch circle, is called

A. Working depth

B. Clearance

C. Backlash

D. Face width

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4

According to Rankine's theory, the failure occurs at a point in a member

A. When the maximum shear stress in a biaxial stress system reaches the shear stress at elastic limit in a simple tension test

B. When the maximum principal stress in a biaxial stress system reaches the elastic limit of the material in a simple tension test

C. When the strain energy per unit volume in a biaxial stress system reaches the strain energy at the elastic limit per unit volume as determined from a simple tension test

D. When the maximum principal strain in a biaxial stress system reaches the strain at the elastic limit as determined from a simple tension test

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4

The size of a cam depends upon

A. Base circle

B. Pitch circle

C. Prime circle

D. Pitch curve

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4

According to Indian standard specifications, 100 H6/g5 means that

A. Tolerance grade for the hole is 6 and for the shaft is 5

B. Tolerance grade for the shaft is 6 and for the hole is 5

C. Tolerance grade for the shaft is 4 to 8 and for the hole is 3 to 7

D. Tolerance grade for the hole is 4 to 8 and for the shaft is 3 to 7

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4

According to I.B.R., when the thickness of the boiler shell (t) is less than 8 mm, then the diameter of the rivet hole (d) is obtained by

A. Equating tearing resistance of the plate to the shearing resistance of the rivets

B. Equating tearing resistance of the plate to the crushing resistance of the rivets

C. Equating shearing resistance to the crushing resistance of the rivets

D. None of the above

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4

Which of the following formula is used in designing a connecting rod?

A. Euler's formula

B. Rankine's formula

C. Johnson's straight line formula

D. Johnson's parabolic formula

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4

The connecting rod bolts are tightened up so that tightening stress

A. Is just sufficient to hold parts together

B. Approaches yield point

C. Is 50% of yield point

D. Is about yield point divided by safety factor

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4

The rolling contact bearings as compared to sliding contact bearings have

A. Low starting and low running friction except at very high speeds

B. Accuracy of shaft alignment

C. Small overall dimensions

D. All of the above

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4

The centrifugal tension in belts

A. Decreases the power transmitted

B. Increases the power transmitted

C. Increase the wrap angle

D. Increases the belt tension without increasing power transmission