# A uniform circular ring of mass M and radius r is rotating with an angular speed ω about an axis passing through its centre and perpendicular to the plane of the ring. Two identical beads, each of mass m, somehow get attached at two diametrically opposite points. The rotational speed of the ring will become

1.  ω M / (M+2m)

2.  ω M / (M+m)

3.  2ω M / (M+2m)

4.  ω

4

ω M / (M+2m)

Explanation :
No Explanation available for this question

# A cylinder of mass m and radius r is resting on a horizontal platform with its axis fixed along the y-axis and free to rotate about its axis. The platform is given a motion x= A cos ωt in the x-direction. If there is no slipping between the cylinder and platform, the maximum torque acting on the cylinder during its motion is

1.  (mAω2)/2r

2.  (Aω2r)/4m

3.  1/2 Aω2mrs

4.  (2mω2)/Ar

4

1/2 Aω2mrs

Explanation :
No Explanation available for this question

# Riser is designed so as to

1.  Freeze after the casting freezes

2.  Freezing before the casting freezes

3.  Freeze at the same as the casting

4.  Minimize the time of pouring

4

Freeze at the same as the casting

Explanation :
No Explanation available for this question

# The contraction allowance provided on the pattern and core boxes compensates for the following type of contraction

1.  Liquid contraction

2.  Solidification contraction

3.  Solid contraction

4.  All the above three types of contractions

4

Solid contraction

Explanation :
No Explanation available for this question

# Chills are used in molds to

1.  Achieve directional solidification

2.   Reduce possibility of blow holes

3.  Reduce the freezing time

4.  Smoothen the metal for reducing

4

Achieve directional solidification

Explanation :
No Explanation available for this question

# Increase in water content in molding sand causes

1.  Flowability to go through a maxima

2.  Permeability to go through a maxima

3.  Compressive strength to go through a maxima

4.  Strength to go through a maximum

4

Flowability to go through a maxima

Explanation :
No Explanation available for this question

# The pressure at the in-gate will be maximum with the gating system

1.  4:8:3

2.  1:3:3

3.  1:2:4

4.  1:2:1

4

1:2:4

Explanation :
No Explanation available for this question

# When there is no room temp change, the total shrinkage allowance on a patterns is INDEPENDENT OF

1.  Pouring temp of the liquid metal

2.  Freezing temperature of the liquid metal

3.  The component size

4.  Coefficient of thermal contraction of solidified metal

4

Pouring temp of the liquid metal

Explanation :
No Explanation available for this question

# Convergence passage is used for feeding liquid

1.  Increase the rate of feeding

2.  Quickly break off the protruding portion of the casting

3.  Decrease wastage of cast metal

4.  Avoid aspiration of air

4

Avoid aspiration of air

Explanation :
No Explanation available for this question

# In a green sand molding process, uniform ramming leads to

1.  Less chance of gas porosity

2.   Uniform flow of molten metal into the mold cavity

3.  Greater dimensional stability of the casting

4.  Less sand expansion type of casting defect

4

Greater dimensional stability of the casting

Explanation :
No Explanation available for this question

## Interview Questions

 MongoDB Java Script Node JS PHP JQuery Python