Shear stress induced in a shaft subjected to tension will be
Maximum at periphery and zero at center
Maximum at center
Uniform throughout
None of the above
Correct Answer :
D. None of the above
Related Questions
One kg of ethylene (C2H4) requires 2 kg of oxygen and produces 22/7 kg of carbon dioxide and __________ kg of water or steam.
9/7
11/7
7/4
1/4
The neutral axis of a transverse section of a beam passes through the centre of gravity of the section and is
In the vertical plane
In the horizontal plane
In the same plane in which the beam bends
At right angle to the plane in which the beam bends
A thin mild steel wire is loaded by adding loads in equal increments till it breaks. The extensions noted with increasing loads will behave as under
Uniform throughout
Increase uniformly
First increase and then decrease
Increase uniformly first and then increase rapidly
Which of the following is correct?
Gauge pressure = Absolute pressure + Atmospheric pressure
Absolute pressure = Gauge pressure + Atmospheric pressure
Absolute pressure = Gauge pressure - Atmospheric pressure
Atmospheric pressure = Absolute pressure + Gauge pressure
The intensity of stress which causes unit strain is called
Unit mass
Modulus of rigidity
Bulk modulus
Modulus of Elasticity
When shear force at a point is zero, then bending moment is _________ at that point.
Zero
Minimum
Maximum
Infinity
Which of the following has the minimum atomic mass?
Oxygen
Sulphur
Nitrogen
Carbon
The behaviour of super-heated vapour is similar to that of
Perfect gas
Air
Steam
Ordinary gas
According to Kelvin-Planck's statement of second law of thermodynamics,
It is impossible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work
It is possible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work
It is impossible to construct a device which operates in a cyclic process and produces no effect other than the transfer of heat from a cold body to a hot body
None of the above
The absolute zero pressure will be
When molecular momentum of the system becomes zero
At sea level
At the temperature of - 273 K
At the centre of the earth
The root mean square velocity of the gas molecules is given by (where k = Boltzmann's constant, T = Absolute temperature, and m = Mass of one molecule of a gas)
√(KT/m)
√(2KT/m)
√(3KT/m)
√(5KT/m)
Otto cycle consists of
Two constant volume and two isentropic processes
Two constant pressure and two isentropic processes
Two constant volume and two isothermal processes
One constant pressure, one constant volume and two isentropic processes
The efficiency of Diesel cycle with decrease in cut-off
Increases
Decreases
First increases and then decreases
First decreases and then increases
The section modulus of a circular section about an axis through its C.G., is
πd²/4
πd²/16
πd3/16
πd3/32
Principal planes are planes having
Maximum shear stress
No shear stress
Minimum shear stress
None of the above
A beam is loaded as cantilever. If the load at the end is increased, the failure will occur
In the middle
At the tip below the load
At the support
Anywhere
The throttling process is __________ process.
Reversible
Irreversible
Reversible or irreversible
None of these
Two closely coiled helical springs 'A' and 'B' are equal in all respects but the number of turns of spring 'A' is half that of spring 'B' The ratio of deflections in spring 'A' to spring 'B' is
1/8
1/4
1/2
2
Slenderness of a column is zero when
Ends are firmly fixed
Column is supported on all sides throughout the length
Length is equal to radius of gyration
Length is twice the radius of gyration
The fuel mostly used in blast furnace for extracting pig iron from iron ores is
Hard coke
Soft coke
Pulverised coal
Bituminous coal
Steam coal is a
Pulverised coal
Brown coal
Coking bituminous coal
Non-coking bituminous coal
In compression test, the fracture in cast iron specimen would occur along
The axis of load
An oblique plane
At right angles to the axis of specimen
Would not occur
A material obeys hooks law up to
Plastic limit
Elastic limit
Yield point
Limit of proportionality
The amount of heat required to raise the temperature of the unit mass of gas through one degree at constant volume, is called
Specific heat at constant volume
Specific heat at constant pressure
Kilo Joule
None of these
The efficiency of Stirling cycle is __________ Carnot cycle.
Greater than
Less than
Equal to
None of these
The efficiency of Ericsson cycle is __________ Carnot cycle.
Greater than
Less than
Equal to
None of these
The total strain energy stored in a body is termed a
Resilience
Proof resilience
Modulus of resilience
Toughness
The ratio of root mean square velocity to average velocity of gas molecules at a particular temperature is
0.086
1.086
1.086
4.086
The efficiency of a Carnot engine depends on
Working substance
Design of engine
Size of engine
Temperatures of source and sink
Stirling and Ericsson cycles are
Reversible cycles
Irreversible cycles
Semi-reversible cycles
Adiabatic irreversible cycles