Related Questions
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4
When the belt speed increases
A. Power transmitted increases
B. Power transmitted decreases
C. Power transmitted increases to a maximum value and then decreases
D. Power transmitted remains the same
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4
When carbon in the cast iron is principally in the form of graphite, the cast iron will be of
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4
The dedendum circle diameter is equal to (where φ = Pressure angle)
A. Pitch circle diameter × cosφ
B. Addendum circle diameter × cosφ
C. Clearance circle diameter × cosφ
D. Pitch circle diameter × sinφ
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4
The coefficient of friction between the belt and pulley depends upon the
A. Material of belt and pulley
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4
If the size of a standard specimen for a fatigue testing machine is increased, the endurance limit for the material will
A. Have same value as that of standard specimen
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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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4
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
A hot short metal is
C. Brittle under all conditions
D. Ductile at high temperature
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4
The centre to centre distance between two consecutive rivets in a row, is called
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4
The radial distance of a tooth from the pitch circle to the top of the tooth is called
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4
The property of a bearing material which has the ability to accomodate shaft deflections and bearing inaccuracies by plastic deformation without excessive wear and heating, is known as
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4
Stress concentration is caused due to
A. Variation in properties of material from point to point in a member
B. Pitting at points or areas at which loads on a member are applied
C. Abrupt change of section
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4
The arms of the pulleys for flat belt drive have
A. Elliptical cross-section
B. Major axis in plane of rotation
C. Major axis twice the minor axis
D. All the three characteristics
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4
The shock resistance of steel is increased by adding
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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
Stress concentration is caused due to
A. Variations in load acting on a member
B. Variations in properties of materials in a member
C. Abrupt change of cross-section
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4
The resilience of a bolt may be increased by
A. Increasing its shank diameter
C. Decreasing its shank diameter
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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
In a boundary lubricated bearing, there is a __________ of lubricant between the journal and the bearing.
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4
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
The pipe joint mostly used for pipes carrying water at low pressures is
D. Spigot and socket joint
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4
A shaft is subjected to fluctuating loads for which the normal torque (T) and bending moment (M) are 1000 N-m and 500 N-m respectively. If the combined shock and fatigue factor for bending is 1.5 and combined shock and fatigue factor for torsion is 2, then the equivalent twisting moment for the shaft is
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4
The suitable material for belt in agricultural machinery is
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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 velocity factor for ordinary cut gears operating at velocities upto 12.5 m/s is equal to
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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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4
The deflection of a cantilever beam under load W is 8. If its width is halved, then the deflection under load W will be
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4
A connecting rod subjected to an axial load may buckle with
A. X-axis as neutral axis
B. Y-axis as neutral axis
C. X-axis or Y-axis as neutral axis
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4
The suitable material for belt used in flour mill is
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4
The elasticity is the property of a material which enables it to
A. Regains its original shape after deformation when the external forces are removed
B. Draw into wires by the application of a tensile force
C. Resists fracture due to high impact loads
D. Retain deformation produced under load permanently