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4

Tearing resistance required to tear off the plate per pitch length is (where p = Pitch of rivets, d = Dia. of rivet hole, and σt = Permissible tensile stress for plate material)

A. p.d.σt

B. p.t.σt

C. (p - d) σt

D. (p - d) t.σt

Correct Answer :

D. (p - d) t.σt


Related Questions

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4

A locking device in which the bottom cylindrical portion is recessed to receive the tip of the locking set screw, is called

A. Ring nut

B. Castle nut

C. Sawn nut

D. Jam nut

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4

Screws used for power transmission should have

A. Low efficiency

B. High efficiency

C. Very fine threads

D. Strong teeth

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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

Which of the following coupling is used to connect two shafts which have both lateral and angular misalignment?

A. Bushed pin type coupling

B. Universal coupling

C. Oldham coupling

D. All of these

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4

A localised compressive stress at the area of contact between two members is known as

A. Tensile stress

B. Bending stress

C. Bearing stress

D. Shear stress

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4

Which is correct statement?

A. A member made of steel will generally be more rigid than a member of equal load carrying ability made of cast iron

B. A member made of cast iron will generally be more rigid than a member of equal load carrying ability made of steel

C. Both will be equally rigid

D. Which one is rigid will depend on several other factors

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4

In testing a material for endurance strength, it is subjected to

A. Static load

B. Dynamic load

C. Impact load

D. Completely reversed load

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4

The design of shafts made of brittle materials is based on

A. Guest's theory

B. Rankine's theory

C. St Venant's theory

D. Von Mises theory

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4

If threads on a bolt are left hand, threads on nut will be

A. Right hand with same pitch

B. Left hand with same pitch

C. Could be left or right hand

D. Right hand with fine pitch

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4

The property of a bearing material which has the ability to accomodate shaft deflections and bearing inaccuracies by plastic deformation without excessive wear and heating, is known as

A. Bondability

B. Embeddability

C. Comformability

D. Fatigue strength

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4

The stress which vary from a minimum value to a maximum value of the same nature (i.e. tensile or compressive) is called

A. Repeated stress

B. Yield stress

C. Fluctuating stress

D. Alternating stress

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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 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

If the centre distance of the mating gears having involute teeth is increased, then the pressure angle

A. Increases

B. Decreases

C. Remains unchanged

D. None of these

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4

The objective of crowning of the flat pulleys of belt drive is to

A. Prevent the belt from running off the pulley

B. Increase the power transmission capacity

C. Increase the belt velocity

D. Prevent the belt joint from damaging the belt surface

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4

The centre to centre distance between two consecutive rivets in a row, is called

A. Margin

B. Pitch

C. Back pitch

D. Diagonal pitch

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4

Fabric belts are used in industrial applications because

A. They are cheap

B. They can work at high temperature

C. They are unaffected by moisture and humidity

D. None of the above

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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

Slenderness ratio is the ratio of

A. Effective length of column to least radius of gyration of the column

B. Width of column to depth of column

C. Maximum size of column to minimum size of column

D. Effective length of column to width of column

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4

The draw of cotter need not exceed

A. 3 mm

B. 5 mm

C. 10 mm

D. 20 mm

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4

The tension on the slack side of the belt is __________ the tension on the tight side of the belt.

A. Equal to

B. Less than

C. Greater than

D. None of these

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4

When two non-parallel or intersecting but coplanar shafts are connected by gears, the arrangement is known as,

A. Bevel gearing

B. Helical gearing

C. Worm gearing

D. None of these

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4

Which of the following statement is wrong for a connecting rod?

A. The connecting rod will be equally strong in buckling about X-axis and Y-axis, if Ixx = 4 Iyy

B. If Ixx > 4 Iyy, the buckling will occur about Y-axis

C. If Ixx < 4 Iyy, the buckling will occur about X-axis

D. The most suitable section for the connecting rod is T-section

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4

Brittle coating technique is used for

A. Determining brittleness

B. Protecting metal against corrosion

C. Protecting metal against wear and tear

D. Experimental stress analysis

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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

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 endurance or fatigue limit is defined as the maximum value of the stress which a polished standard specimen can withstand without failure, for infinite number of cycles, when subjected to

A. Static load

B. Dynamic load

C. Static as well as dynamic load

D. Completely reversed load

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4

When the belt speed increases

A. Power transmitted increases

B. Power transmitted decreases

C. Power transmitted increases to a maximum value and then decreases

D. Power transmitted remains the same

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4

The shear stress at a point in a shaft subjected to a torque is

A. Directly proportional to the polar moment of inertia and to the distance of the point from the axis

B. Directly proportional to the applied torque and inversely proportional to the polar moment of inertia

C. Directly proportional to the applied torque and the polar moment of inertia

D. Inversely proportional to the applied torque and the polar moment of inertia

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4

Resilience of a material is important, when it is subjected to

A. Combined loading

B. Fatigue

C. Thermal stresses

D. Shock loading