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What is the correct answer?

4

The shearing stresses in the inner face as compared to outer face of the wire in a heavy close coiled spring is

A. Larger

B. Smaller

C. Equal

D. Larger/smaller depending on diameter of spring coil

Correct Answer :

A. Larger


Related Questions

What is the correct answer?

4

The shearing stresses in the inner face as compared to outer face of the wire in a heavy close coiled spring is

A. Larger

B. Smaller

C. Equal

D. Larger/smaller depending on diameter of spring coil

What is the correct answer?

4

A sliding bearing which operates without any lubricant present, is called

A. Zero film bearing

B. Boundary lubricated bearing

C. Hydrodynamic lubricated bearing

D. Hydrostatic lubricated bearing

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4

The velocity factor for precision metallic gears cut with high accuracy and operating at velocities upto 20 m/s is equal to

A. 0.75/ (0.75 + √v)

B. 3/ (3 + v)

C. 4.5/ (4.5 + v)

D. 6/ (6 + v)

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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

The design calculations for members subject to fluctuating loads with the same factor of safety, yield the most conservative estimates when using

A. Gerber relation

B. Soderberg relation

C. Goodman relation

D. None of these

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4

In an oil lubricated journal bearing, the coefficient of friction between the journal and the bearing

A. Remains constant at all speeds

B. Is minimum at zero speed and increases monotonically with increase in speed

C. Is maximum at zero speed and decreases monotonically with increase in speed

D. Becomes minimum at an optimum speed and then increases with further increase in speed

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4

Turn buckle has

A. Right hand threads on bout ends

B. Left hand threads on both ends

C. Left hand threads on one end and right hand threads on other end

D. No threads

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4

The maximum normal stress theory is used for

A. Plastic materials

B. Brittle materials

C. Non-ferrous materials

D. Ductile materials

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4

When a helical compression spring is cut into halves, the stiffness of the resulting spring will be

A. Same

B. Double

C. One-half

D. One-fourth

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4

In unilateral system of tolerance, the tolerance is allowed on

A. Both sides of the actual size

B. One side of the actual size

C. One side of the nominal size

D. Both sides of the nominal size

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4

A chain drive transmits __________ power as compared to belt drive.

A. More

B. Less

C. Same

D. None of these

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4

Stress concentration factor is defined as the ratio of

A. Maximum stress to the endurance limit

B. Nominal stress to the endurance limit

C. Maximum stress to the nominal stress

D. Nominal stress to the maximum stress

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4

For same pulley diameters, center distance, belt speed and belt and pulley materials,

A. Open belt drive transmits more power than crossed belt drive

B. Crossed belt drive transmits more power than open belt drive

C. Open and crossed belt drives transmit same power

D. Power transmission does not depend upon open and crossed types of constructions

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4

Two rigid plates are clamped by means of bolt and nut with an initial force F. After tightening, a separating force P (P < F) is applied to the lower plate, which in turn acts on the nut. The tension in the both after this is

A. F + P

B. F P

C. P

D. F

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4

The resultant axial load on a bolt depends on

A. Initial tension

B. External load applied

C. Relative elastic yielding (springness) of the bolt and the connected member

D. All of the above

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4

The strap end of a connecting rod of steam engine is joined by

A. Gib of cotter joint

B. Sleeve and cotter joint

C. Spigot socket cotter joint

D. Knuckle joint

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4

The following type of nut is used with alien bolt

A. Hexagonal nut

B. Slotted nut

C. Castle nut

D. Any one of the above

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4

When two helical springs of equal lengths are arranged to form a cluster spring, then

A. Shear stress in each spring will be equal

B. Load taken by each spring will be half the total load

C. Only A is correct

D. Both A and B is correct

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4

A tapered key which fits in a key way in the hub and the bottom of which is shaped to fit the curved surface of the shaft, is known as,

A. Hollow saddle key

B. Hollow key

C. Soft key

D. None of these

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4

When spring index increases, the value of Wahl's stress factor

A. Increases linearly

B. Decreases linearly

C. Remains same

D. Increases exponentially

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4

Maximum principal stress theory is applicable for

A. Ductile materials

B. Brittle materials

C. Elastic materials

D. All of the above

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4

The bending stress in a curved beam is

A. Zero at the centroidal axis

B. Zero at the point other than centroidal axis

C. Maximum at the neutral axis

D. None of these

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4

Endurance limit or fatigue limit is the maximum stress that a member can withstand for an infinite number of load applications without failure when subjected to

A. Dynamic loading

B. Static loading

C. Combined static and dynamic loading

D. Completely reversed loading

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4

Wahl's stress factor __________ very rapidly as the spring index decreases.

A. Increases

B. Decreases

C. Remain same

D. None of these

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4

In leaf springs, the longest leaf is known as

A. Master leaf

B. Lower leaf

C. Upper leaf

D. None of these

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4

The most important dimension in the design of a nut is

A. Pitch diameter

B. Inside diameter

C. Outside diameter

D. Height

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4

In a horizontal flat belt drive, it is customary to use

A. Bottom side of belt as slack side

B. Top side of belt as slack side

C. Idler pulley

D. None of the above

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4

The form factor of a helical gear __________ with the increase in the helix angle.

A. Increases

B. Decreases

C. Remains constant

D. None of these

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4

The edges of the plates for cylindrical vessels are usually bevelled to an angle of 80° for

A. Reducing stress concentration

B. Ease of manufacture

C. Safety

D. Fullering and caulking

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4

The distribution of the forces along the length of key fitted in a shaft

A. Varies linearly

B. Is uniform throughout

C. Varies exponentially, being more near the torque-input end

D. Varies exponentially, being less near the torque-input end