Related Questions
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4
When an open coiled helical compression spring is subjected to an axial compressive load, the stress induced in the wire is
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4
In order to ensure self locking in a screw jack, it is essential that helix angle is __________ friction angle.
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4
The contact ratio is the ratio of
A. Length of arc of recess to the circular pitch
B. Length of path of contact to the circular pitch
C. Length of arc of contact to the circular pitch
D. Length of arc of approach to the circular pitch
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4
The belt slip occurs due to
C. Driving pulley too small
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4
A compound cylinder with inner radius 50 mm and outer radius 70 mm is made by shrinking one cylinder on to the other cylinder, the junction radius is 60 mm and the junction pressure is 1.1 N/mm². The maximum hoop stress developed in the inner cylinder is
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4
Two helical springs of the same material and of equal circular crosssection, length and number of turns, but having radii 80 mm and 40 mm, kept concentrically (smaller radius spring within the larger radius spring), are compressed between two parallel planes with a load W. The inner spring will carry a load equal to
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4
In leaf springs, the longest leaf is known as
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4
The taper on a rectangular sunk key is
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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
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4
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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4
If T₁ and T₂ are the tensions on the tight and slack sides of the belt respectively, and Tc is the centrifugal tension, then initial tension in the belt is equal to
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4
Transverse fillet welded joints are designed for
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4
When a nut is tightened by placing a washer below it, the bolt will be subjected to following type of loads
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4
A key capable of tilting in a recess milled out in a shaft is known as
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4
The centre to centre distance between two consecutive rivets in a row, is called
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4
A column of length l is fixed at both ends. The equivalent length of the column is
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4
When an open coiled helical compression spring is subjected to an axial load (W), the compression produced in the spring will be (where n = No. of active turns of the spring, and G = Modulus of rigidity for the spring material)
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4
For maximum power, the velocity of the belt will be
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4
The temperature at which the new grains are formed in the metal is known as
A. Lower critical temperature
B. Upper critical temperature
C. Recrystallisation temperature
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4
The rivet head used for boiler plate riveting is usually
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4
In testing a material for endurance strength, it is subjected to
D. Completely reversed load
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4
In the calculation of induced shear stress in helical springs, the Wahl's stress factor is used to take care of
A. Combined effect of transverse shear stress and bending stress in the wire
B. Combined effect of bending stress and curvature of the wire
C. Combined effect of transverse shear stress and curvature of wire
D. Combined effect of torsional shear stress and transverse shear stress in the wire
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4
According to maximum shear stress theory, the maximum shear stress in the shaft is
C. (1/2) × [σ + √(σ² + 4τ²)]
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4
The included angle for the British Association thread is
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4
For longitudinal joint in boilers, the type of joint used is
A. Butt joint with single cover plate
B. Butt joint with double cover plate
C. Lap joint with one ring overlapping the other
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4
A crankshaft is a __________ shaft.
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4
The minimum number of teeth on the pinion which will mesh with any gear without interference for 20° full depth involute teeth will be
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4
The objective of idler pulley in belt drive is to
A. Decrease the tendency of belt to slip
B. Increase the power transmission capacity
C. Increase the wrap angle and belt tension
D. All the above objectives
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4
A spring of stiffness 1000 N/m is stretched initially by 100 mm from the undeformed position. The work required to stretch it by another 100 mm is
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4
Which of the following statement is wrong?
A. A key is used as a temporary fastening
B. A key is subjected to tensile stresses
C. A key is always inserted parallel to the axis of the shaft
D. A key prevents relative motion between the shaft and boss of the pulley