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4

A column is known as a long column if the slenderness ratio is

A. 40

B. 50

C. 70

D. 100

Correct Answer :

D. 100


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

The effective stress in wire ropes during normal working is equal to the stress due to

A. Axial load plus stress due to bending

B. Acceleration/retardation of masses plus stress due to bending

C. Axial load plus stress due to acceleration/retardation

D. Bending plus stress due to acceleration/retardation

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4

In the levers of third type, the mechanical advantage is __________ one.

A. Less than

B. Equal to

C. More than

D. None of these

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4

For steel, the ultimate strength in shear as compared to ultimate strength in tension is

A. 1/2

B. 1/3

C. 1/4

D. 2/3

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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

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

A. Bending stress

B. Shear stress

C. Tensile stress

D. Bearing stress

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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

In a butt welded joint, the size of weld is __________ the throat of weld.

A. 0.5 times

B. Equal to

C. 2 times

D. Double

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4

The deflection of a cantilever beam under load W is 8. If its width is halved, then the deflection under load W will be

A. 2/8

B. 8/2

C. 4/8

D. 8/4

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4

In designing a connecting rod, it is considered like __________ for buckling about Y-axis.

A. Both ends hinged

B. Both ends fixed

C. One end fixed and the other end hinged

D. One end fixed and the other end free

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4

In static loading, stress concentration is more serious in

A. Brittle materials

B. Ductile materials

C. Brittle as well as ductile materials

D. Elastic materials

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4

Two shafts will have equal strength, if

A. Diameter of both the shafts is same

B. Angle of twist of both the shafts is same

C. Material of both the shafts is same

D. Twisting moment of both the shafts is same

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4

In a full journal bearing, the angle of contact of the bearing with the journal is

A. 120°

B. 180°

C. 270°

D. 360°

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4

Allen bolts are

A. Self locking bolts

B. Designed for shock load

C. Used in aircraft application

D. Provided with hexagonal depression in head

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4

The taper on a rectangular sunk key is

A. 1 in 16

B. 1 in 32

C. 1 in 48

D. 1 in 100

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4

Whether any core is required in wire ropes

A. Yes

B. No

C. Sometimes

D. Rarely

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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

The notch sensitivity q is expressed in terms of fatigue stress concentration factor Kf and theoretical stress concentration factor Kt as

A. (Kf + 1)/ (Kt + 1)

B. (Kf - 1)/ (Kt - 1)

C. (Kt + 1)/ (Kf + 1)

D. (Kt - 1)/ (Kf - 1)

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4

Cast iron pipes are mainly used

A. For conveying steam

B. In water and sewage systems

C. In pressure lubrication systems on prime movers

D. All of the above

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4

The ratio of driving tensions in V-belt drives is __________ flat belt drives.

A. Equal to

B. sinα times more than

C. sinα times less than

D. cosecα times more than

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4

A triple riveted butt joint with double straps of unequal width is to be designed for a boiler shell. The pitch of the rivets in the outer row is double the pitch in the inner row and zigzag riveting is proposed. Which of the following statement is correct?

A. There are four rivets per pitch length, all in double shear

B. There are four rivets per pitch length, out of which two are in single shear and two are in double shear

C. There are five rivets per pitch length, all in double shear

D. There are five rivets per pitch length, out of which four are in double shear and one is in single shear

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4

The steel pulleys are __________ in weight than cast iron pulleys of the same capacity.

A. Heavier

B. Lighter

C. Moderate

D. None of these

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4

Silver based solder is used for

A. Flaring

B. Brazing

C. Soft soldering

D. Fusion welding

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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

The load cup of a screw jack is made separate from the head of the spindle to

A. Prevent the rotation of load being lifted

B. Enhance the load carrying capacity of the jack

C. Reduce the effort needed for lifting the working load

D. Reduce the value of frictional torque

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4

The maximum shear stress theory is used for

A. Brittle materials

B. Ductile materials

C. Plastic materials

D. Nonferrous materials

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4

Which of the following screw thread is used for power transmission in one direction only?

A. Square threads

B. Multiple threads

C. Acme threads

D. Buttress threads

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4

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

A. [(√P1 + √P2)/2]²

B. P1 + P2

C. 2 × (P1 + P2)

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

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4

Which of the following statement is correct regarding power screws?

A. The efficiency of a self locking screw can not be more than 50%

B. The efficiency of Acme (trapezoidal) thread is less than that of a square thread

C. If the friction angle is less than the helix angle of the screw, then the efficiency will be more than 50%

D. (A) and (B) Only

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4

In worm gears, the angle between the tangent to the pitch helix and an element of the cylinder, is known as

A. Helix angle

B. Pressure angle

C. Pitch lead angle

D. None of these