Related Questions
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4
The material used for brake lining should have __________ coefficient of friction.
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Soderberg relation is based on __________ of the material whereas all other failure relation for dynamic loading are based on ultimate strength of the material.
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4
A sliding bearing in which although lubricant is present, the working surfaces __________ contact each other at least part of the time, is called boundary lubricated bearing.
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4
When the screw in a mechanical screw jack rotates, the load kept on the top of it moves
C. Axially upwards or downwards
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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
The piston rod of a steam engine is usually connected to the crosshead by means of
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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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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
Yield point in fatigue loading as compared to static loading is
D. Depends on other factors
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4
According to Indian standards, total numbers of fundamental deviations are
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When a beam of rectangular cross-section of width b and depth d, is subjected to a shear force F, the maximum shear stress induced will be
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4
Which of the following key is preferred for the condition when a large amount of impact type torque is to be transmitted in both direction of rotation?
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A sliding bearing which can support steady loads without any relative motion between the journal and the bearing, is called
A. Hydrostatic lubricated bearing
B. Hydrodynamic lubricated bearing
C. Boundary lubricated bearing
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4
The ratio of driving tensions for flat belts, neglecting centrifugal tension, is (where T₁, and T₂ = Tensions on the tight and slack sides of belt respectively, μ = Coefficient of friction, between the belt and pulley, and θ = Angle of contact)
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4
Which of the following statement is wrong for a connecting rod?
A. The connecting rod will be equally strong in buckling about X-axis and Y-axis, if Ixx = 4 Iyy
B. If Ixx > 4 Iyy, the buckling will occur about Y-axis
C. If Ixx < 4 Iyy, the buckling will occur about X-axis
D. The most suitable section for the connecting rod is T-section
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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 maximum efficiency of a square threaded screw is
A. (1 - sinφ)/ (1 + sinφ)
B. (1 + sinφ)/ (1 - sinφ)
C. (1 - sinφ)/ (1 + cosφ)
D. (1 + cosφ)/ (1 - sinφ)
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Which of the following screw thread is adopted for power transmission in either direction?
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4
In most machine members, the damping capacity of the material should be
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4
According to I.B.R., the distance between the rows of rivets, for equal number of rivets in more than one row for lap joint or butt joint (chain riveting) shall not be less than
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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
A single strap butt joint is always in __________ shear.
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4
Taper on the cotter and slot is provided
D. May be provided anywhere
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Which of the following statement is correct for gears?
A. The pitch circle diameter is equal to the product of module and number of teeth
B. The addendum is less than dedendum
C. The pitch circle is always greater than the base circle
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4
Aircraft body is usually fabricated by
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4
A tube has the following advantage over pipe
A. Lighter and easier to handle
B. Greater shock absorption
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The expansion joint is mostly used for pipes which carry steam at __________ pressures.
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The stress induced in the belt is,
D. Torsional shear stress
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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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The suitable material for belt in agricultural machinery is