Line joining the heads indicated by the manometers connected at inlet and throat section of venturimeter indicates
- Only velocity head
- Total energy line (TEL)
- Hydraulic gradient line (HGL)
- Datum head difference
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Q) A pipe with significant length and small diameter is attached at the bottom of the tank to remove the fluid from the tank to atmosphere, what will be the loss of head if friction loss is considered zero?
In case of turbulent flow of a fluid through a circular pipe (as compared to the case of laminar flow at the same flow rate) maximum velocity is _______ shear stress at wall is _______ and the pressure drop across a given length is _______
a) Higher, higher, higher
b)Higher, lower, lower
c)Lower, higher, higher
d)Lower, higher, lower
Guys what are the common things to be remembered for the exam like log values, tables, etc?
anyone tell me last year cut off marks of isro sc mechanical
1. Stress and strain both are Rank 2 Tensors(True/ False)
2.Stress depends on material properties(True/False)
3)Stress depends on internal resisting force but not on applied resisting area(True/False)
4)Strain always leads to stress(True/False)
5)Maximum stress a material can withstand is called strength(True/False)
1) For isotropic materials E > K > G (true/false)
2)For orthotropic materials number of independent elastic constants are 9 (true/false)
3)For anisotropic materials, number of elastic constants are infinity (true/false)
4)Poisson's ratio is always positive for engineering materials and can be negative for genetic materials (true/false)
5)Young's modulus 'E' for material 1 is Ea = 200Gpa and for second material it is Eb = 10Gpa;
then material 2 is more elastic than material 1 (true/false)
6)Slope of stress-strain is young's modulus E (true/false)
Which of the following is true about brittle materials
- All soft materials are brittle in nature
- All the above
- Exhibit Strong to compression and weak to tension loads
- Material failure does not takes place suddenly
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For engineering materials, poison's ratio lies between
- 0 to 0.5
- 0 to 1
- 0 to -0.5
- -0.5 to 0.5
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A vertical prismatic bar fixed at one end; the deflection due to self weight is
- Independent of area of cross section
- None
- Both a and b
- Independent of shape of cross section
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Q) A copper rod 400mm long is pulled in tension to length of 401.2 mm by applying a tensile load of 330Mpa. If the deformation is entirely elastic; then Young's modulus of copper is _______
In order to make a bar of uniform strength; the area of cross section varies
- Linearly
- None
- Both a and b
- Logarithmically
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The deformation of a bar under it's own weight compared to when subjected to direct axial load equal to it's own weight would be
- Same
- Double
- One fourth
- Half
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Volumetric strain of a sphere is
- None
- Twice the strain of diameter
- Thrice the strain of diameter
- Equal to strain of diameter
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hi , sorry to disturb in this group, can anyone tell me technical assistant (electronics) pattern please, i am not getting neither syllabus nor pattern over internet,please help...
Q) A cube with all faces free to deform has young's modulus 'E' Poisson's ratio 'mu' coefficient of thermal expansion 'alpha' the pressure (hydrostatic stress) developed within the cube when it is subjected to uniform increase of temperature 'delta T' is given by ______
Do we get any questions from complex stresses and strains ?
Q) Strength of a material depends upon its
- c) Type of loading
- b) Internal structure
- a) Cross - section
- d) Both b and c
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As temp of solid metal increases
- Strength inc but ductility dec
- Strength dec ductility inc
- Both dec
- Both inc
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Hook's law holds good upto
a)The elastic point
b)Limit of proportionality
c)Yield point
d)Ultimate point