# The buckling load for a column pinned a t both ends is 10 kN. II the ends are fixed, the buckling load changes to

1.  40 kN

2.  2.5 kN

3.  5 kN

4.  20 kN

4

40 kN

Explanation :
No Explanation available for this question

# The normal stresses a t a point are ax = 10 MPa and, ay = 2 MPa; the shear stress at this point i4 MPa. The maximum principal stress a t this point is:

1.  16 MPa

2.  14 MPa

3.  11 MPa

4.  10 MPa

4

11 MPa

Explanation :
No Explanation available for this question

# The ratio of average shear stress to the maximum shear stress in a beam with a square cross-section is:

1.  1

2.  2/3

3.  3/2

4.  2

4

2/3

Explanation :
No Explanation available for this question

# Heat transfer coefficient for free convection in gases, forced convection in gases and vapours, and for boiling water lie, respectively in the ranges of

1.  5 - 15, 20 - 200 and 3000 - 50,000 W/m2K.

2.   20 - 50, 200 - 500 and 50,000 - 105 W/m2K.

3.  50 - 100, 500 - 1000 and 105 - 103 W/m2K.

4.   20 - 100, 200 - 1000, and a constant 103 W/m2K.

4

5 - 15, 20 - 200 and 3000 - 50,000 W/m2K.

Explanation :
No Explanation available for this question

# If VN and α are the nozzle exit velocity and nozzle angle in an impulse turbine, the optimum blade velocity is given by

1.  VN cos2α

2.   VN sin2α

3.  VN cos2α/2

4.  VN 2/2

4

VN 2/2

Explanation :
No Explanation available for this question

# Curtis stage, Rateau stage and a 50% reaction stage in a steam turbine are examples of

1.  different types of impulse stages

2.  different types of reaction stages

3.  a simple impulse stage, a velocity compounded impulse stage and reaction stage

4.  a velocity compounded impulse stage, a simple impulse stage and a reaction stage

4

a velocity compounded impulse stage, a simple impulse stage and a reaction stage

Explanation :
No Explanation available for this question

# The basic load rating of a ball bearing is

1.  the maximum static radial load that can be applied without ca using any plastic deformation of bearing component

2.  the radial load a t which 90% of the group of apparently identical bearings run for one million revolutions before the first evidence of failure.

3.  the maximum radial load that ca n be applied during operation without any plastic deformation of bearing components.

4.   a combination of radial and axial loads that can be applied without any plastic deforma tion.

4

the radial load a t which 90\% of the group of apparently identical bearings run for one million revolutions before the first evidence of failure.

Explanation :
No Explanation available for this question

# Decreasing grain size in a polycrystalline material

1.  increases yield strength and corrosion resistance

2.  decreases yield strength and corrosion resistance

3.  decreases yield strength but increases corrosion resistance

4.  increases yield strength but decreases corrosion resistance

4

increases yield strength but decreases corrosion resistance

Explanation :
No Explanation available for this question

# Auto collimator is used to check

1.  roughness

2.  flatness

3.  angle

4.  automobile balance

4

angle

Explanation :
No Explanation available for this question

# Failure of a bead weld between a heavy steel section and a thin section is mainly due to the forma tion of

1.  spheroidite

2.  bainite

3.  carbon free zone due to burning of carbon a t high temperature

4.  martensite.

4