### Related Questions

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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

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4

# The bearings of heavy series have capacity ________ over the medium series.

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4

# A metal pipe of 1 m diameter contains a fluid having a pressure of 1 N/mm². If the permissible tensile stress in the metal is 20 N/mm², then the thickness of the metal required for making the pipe will be

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4

# The suitable material for belt used in flour mill is

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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

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4

# A bolt of uniform strength can be developed by

A. Keeping the core diameter of threads equal to the diameter of unthreaded portion of the bolt

B. Keeping the core diameter smaller than the diameter of the unthreaded portion

C. Keeping the nominal diameter of threads equal to the diameter of unthreaded portion of the bolt

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4

# In worm, gears, pitch lead angle is

A. Half the angle between two inclined faces in axial plane

B. The angle between the tangent to the pitch helix and the plane of rotation

C. The angle between the tangent to the pitch helix and an element of the cylinder

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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

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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

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4

# Yield point in fatigue loading as compared to static loading is

D. Depends on other factors

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4

# The belt slip occurs due to

C. Driving pulley too small

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# The design of shafts made of brittle materials is based on

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

A. Reducing stress concentration

D. Fullering and caulking

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4

# The endurance limit of a material with finished surface in comparison to rough surface is

D. More or less depending on quantum of load

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# The included angle for the British Association thread is

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# In radial bearings, the load acts __________ to the axis of rotation.

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

C. One end fixed and the other end hinged

D. One end fixed and the other end free

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4

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

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4

# If a material fails below its yield point, failure would be due to

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# When the connected members are very yielding (soft gasket) as compared to the bolt, then the resultant load on the bolt will be equal to the

C. Sum of the initial tension and external load applied

D. Initial tension or external load, whichever is greater

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4

# For a shaft diameter of 200 mm, the number of bolts in a marine flange coupling should be

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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

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4

# Gear box is used

C. To obtain variable speeds

D. To increase efficiency of system

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# 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

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4

# 18/8 steel contains

A. 18% nickel and 8% chromium

B. 18% chromium and 8% nickel

C. 18% nickel and 8% vanadium

D. 18% vanadium and 8% nickel

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4

# Rankine's theory of failure is applicable for following type of materials

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# The angle of twist of shaft is

A. Directly proportional to (shaft diameter)²

B. Inversely proportional to (shaft diameter)²

C. Directly proportional to (shaft diameter)⁴

D. Inversely proportional to (shaft diameter)⁴

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

D. Larger/smaller depending on diameter of spring coil

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# For a shoe brake, the equivalent coefficient of friction is equal to (where μ = Actual coefficient of friction, and θ = Semi-block angle)

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# The centre distance between two meshing involute gears is equal to

A. (Sum of base circle radii)/cosφ

B. (Difference of base circle radii)/cosφ

C. (Sum of pitch circle radii)/cosφ

D. (Difference of pitch circle radii)/cosφ