Related Questions
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4
For steel, the ultimate strength in shear as compared to ultimate strength in tension is
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Wahl's stress factor __________ very rapidly as the spring index decreases.
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4
The crest diameter of a screw thread is same as
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4
In designing a flange coupling, the pitch circle diameter of bolts is taken as (where d = Diameter of the shaft)
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4
A key made from a cylindrical disc having segmental cross-section, is known as
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4
In order to avoid tearing of the plate at edge, the distance from the center line of the rivet hole to the nearest edge of the plate in terms of dia. of rivet d should be equal to
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4
The edges of a boiler plate are bevelled to an angle of
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4
At low temperatures (say 75°C) the notched bar impact value of steel
D. Depends on heat treatment carried out
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4
Gear box is used
C. To obtain variable speeds
D. To increase efficiency of system
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4
For tight leakage joints, following type of thread is best suited
D. NPT (national pipe threads)
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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,
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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
In case of V-belt drive
A. The belt should touch the bottom of groove in the pulley
B. The belt should not touch the bottom of groove in the pulley
C. The belt should not touch the sides of groove in the pulley
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4
The notch angle of the Izod impact test specimen is
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4
Basic hole is one
A. Whose upper deviation is zero
B. Whose lower deviation is zero
C. Whose lower as well as upper deviations are zero
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4
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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Which is positive drive?
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4
In Vickers hardness testing, the pyramid indentor apex is
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4
If shearing stress in nut is half the tensile stress in a bolt, then nut length should be equal to
B. 0.75 × diameter of bolt
C. 1.25 × diameter of bolt
D. 1.5 × diameter of bolt
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4
If d is the normal diameter of a bolt in mm, then the initial tension in kg in a bolt used for making a fluid tight joint as for steam engine cover joint is calculated by the relation
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4
The cold working of metals is carried out __________ the recrystallisation temperature.
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4
Belt slip may occur due to
C. Driving pulley too small
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When a circular beam of diameter d is subjected to a shear force F, the maximum shear stress induced will be
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The allowable static stress for steel gears is approximately __________ of the ultimate tensile stress.
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Two shafts A and B are made of the same material. The diameter of shaft A is twice as that of shaft B. The power transmitted by the shaft A will be __________ of shaft B.
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4
Buttress threads are usually found on
C. Spindles of bench vices
D. Railway carriage couplings
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4
The largest diameter of an external or internal screw thread is known as
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4
The most important dimension in the design of a nut is
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The endurance limit in shear of carbon steel can be obtained by multiplying the endurance limit in flexure by a factor of
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Which of the following is not correct procedure to increase the fatigue limit?
C. Surface decarburisation