If there is a circular hole in a metal plate, what happens to the radius of the hole when the plate is heated?

LohaHridoy
  1. Increases
  2. Decreases
  3. Unchanged
  4. Depends upon the metal

0 like 0 dislike
1 views
Share with your friends

1 Answers

AhmedNazir

Call

Answer: Option 1

When a metal plate with a circular hole at its centre is heated, definitely along with the areal expansion of the plate the diameter of the circular hole also increases. Using the differential equations of coefficients of expansions, we find that the hole radius increases at the same linear rate as the metal.

0 like 0 dislike
1 views
Talk Doctor Online in Bissoy App
When a ring of metal is heated what happens to its hole ?

Answer: Option 1 The hole size will increase because in expansion the size between two molecules do not increase so when the molecules on the outer edge move outward. Due...

1 Answers 1 views
When a hole of diameter ‘d’ is punched in a metal of thickness 't', then the force required to punch a hole is equal to (where $${\tau _{\text{u}}}$$ = Ultimate shear strength of the material of the plate)?

Answer: Option 2 Let'

1 Answers 2 views
A composite wall consists of two plates A and B placed in series normal to the flow of heat. The thermal conductivities are kA and kB and the specific heat capacities are CPA and CPB for plates A and B respectively. Plate B has twice the thickness of plate A. At steady state, the temperature difference across plate A is greater than that across plate B, when?

Answer: Option 3 Let'

1 Answers 4 views
A square hole is made in a circular lamina, the diagonal of the square is equal to the radius of the circle as shown in below figure the shift in the centre of gravity is?

Answer: Option 1 Let'

1 Answers 4 views
A metal plate with a circular hole at the centre is heated. What will happen to the area of the hole ?

Answer: Option 1 Assuming the disc is uniform and isotropic (the same in different directions), the hole will expand in the same ratio as the metal. It is because the...

1 Answers 1 views
At what value of Prandtl number, the hydrodynamic and thermal boundary layers of a fluid flowing over a heated plate will be identical?

Answer: Option 1 Let'

1 Answers 1 views
A plate with an elliptical hole in the centre, with semi-major axis (a) perpendicular to the direction of loading and semi-minor axis (b) along the direction of loading, is subjected to a pull P. The maximum stress induced at the edge of the hole is equal to (where $$\sigma $$ = Stress for a plate with no hole i.e. nominal stress)?

Answer: Option 2 Let'

1 Answers 1 views
In order to avoid tearing of the plate at an edge, the distance from the centre line of the rivet hole to the nearest edge of the plate should be equal to (where d = Diameter of rivet hole)?

Answer: Option 2 Let'

1 Answers 1 views
Tearing resistance required to tear off the plate per pitch length is (where p = Pitch of rivets, d = Dia. of rivet hole and $${\sigma _{\text{t}}}$$ = Permissible tensile stress for plate material)?

Answer: Option 4 Let'

1 Answers 1 views
In order to avoid tearing off the plate at an edge, the distance from the center of the rivet hole to the nearest edge of the plate (i.e. margin) should be (where d = Diameter of rivet hole in mm)?

Answer: Option 2 Let'

1 Answers 1 views