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4

The designation M 33 × 2 of a bolt means

A. Metric threads of 33 numbers in 2 cm

B. Metric threads with cross-section of 33 mm

C. Metric threads of 33 mm outside diameter and 2 mm pitch

D. Bolt of 33 mm nominal diameter having 2 threads per cm

Correct Answer :

C. Metric threads of 33 mm outside diameter and 2 mm pitch


Related Questions

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4

In block brakes, the ratio of shoe width to wheel diameter is taken between

A. 0.1 and 0.25

B. 0.25 and 0.50

C. 0.50 and 0.75

D. 0.75 and 1

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4

If a load W is applied instantaneously on a bar; Then the stress induced in bar will

A. Be independent of ratio of mass of load W to mass of bar (y)

B. Increase with increase in y

C. Decrease with decrease in y

D. Depend on other considerations

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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

Factor of safety for fatigue loading is the ratio of

A. Elastic limit to the working stress

B. Elastic limit to the yield point

C. Endurance limit to the working stress

D. Young's modulus to the ultimate tensile strength

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4

Which of the following screw thread is adopted for power transmission in either direction?

A. Acme threads

B. Square threads

C. Buttress threads

D. Multiple threads

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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

In a hydrodynamic lubricated bearing

A. There is a thick film of lubricant between the journal and the bearing

B. There is a thin film of lubricant between the journal and the bearing

C. The lubricant is forced between the journal and the bearing, by external pressure

D. There is no lubricant between the journal and the bearing

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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 stress in the threaded part of the bolt will be __________ as compared to the shank.

A. Same

B. Higher

C. Lower

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

The smallest diameter of an external or internal screw thread is known as

A. Minor diameter

B. Major diameter

C. Pitch diameter

D. None of these

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4

Multiple threads are used to secure

A. Low efficiency

B. High efficiency

C. High load lifting capacity

D. High mechanical advantage

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4

When the speed of belt increases,

A. The coefficient of friction between the belt and pulley decreases

B. The coefficient of friction between the belt and pulley increases

C. The power transmitted will decrease

D. The power transmitted will increase

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4

According to I.B.R., when the thickness of boiler shell (t) is greater than 8 mm, then the diameter of 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 ball bearings are, usually, made from

A. Low carbon steel

B. High carbon steel

C. Medium carbon steel

D. High speed steel

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4

For applications involving high stresses in one direction only the following type of thread would be best suited

A. ISO metric thread

B. Acme thread

C. Square thread

D. Buttress thread

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4

A taper key which fits half in the key way of the hub and half in the key way of shaft, is known as

A. Angular bevel gears

B. Mitre gears

C. Crown Bevel gears

D. Internal bevel gears

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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

For standard coarse threads of nut, the threads will be as strong in failure by shear as the bolt in tension, if the height of nut (h) is approximately

A. 0.4 times

B. 0.6 times

C. 0.7 times

D. 0.8 times

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4

The function of a washer is to

A. Provide cushioning effect

B. Provide bearing area

C. Absorb shocks and vibrations

D. Provide smooth surface in place of rough surface

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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

The ratio of endurance limit in shear to the endurance limit in flexure is

A. 0.70

B. 0.25

C. 0.40

D. 0.55

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4

The strength of a riveted joint is equal to

A. Tearing strength of plate (Pt)

B. Shearing strength of rivet (Ps)

C. Crushing strength of rivet (Pc)

D. Least value of Pt Ps and Pc

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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

A fast and loose pulley drive is used when

A. Shafts are arranged parallel and rotate in the opposite directions

B. Shafts are arranged parallel and rotate in the same directions

C. Shafts are arranged at right angles and rotate in one definite direction

D. Driven shaft is to be started or stopped whenever desired without interfering with the driving shaft

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4

For a shaft diameter of 100 mm, the number of bolts in a flange coupling should be

A. 4

B. 6

C. 8

D. 10

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4

The included angle between the sides of V-belt is

A. 40°

B. 45°

C. 38°

D. 60°

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4

When two nonintersecting and non-coplanar shafts are connected by gears, the arrangement is known as

A. Spur gearing

B. Helical gearing

C. Bevel gearing

D. Spiral gearing

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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

When carbon in the cast iron is principally in the form of graphite, the cast iron will be of

A. Brown colour

B. Yellow colour

C. White colour

D. Grey colour