# The coefficient of discharge(Cd)of an orifice varies with

1.  Reynold number

2.  Weber number

3.  Froude number

4.  Mach number

4

Reynold number

Explanation :
No Explanation available for this question

# If the particles of a fluid attain such velocities that vary from point to point in magnitude and direction as well as from instant, the flow is

1.  Uniform flow

3.  Turbulent flow

4.  Laminar flow

4

Turbulent flow

Explanation :
No Explanation available for this question

# Your finger sticks to an ice tray just taken from the refrigerator. Which factor has more effect on this phenomenon

1.  The inside temperature of the freezer (Suppose it’s working properly)

2.  The humidity of the air

3.  The heat capacity of both your finger and the tray

4.  The thermal conductivity of the tray

4

The thermal conductivity of the tray

Explanation :
No Explanation available for this question

# For the distribution curves shown, which of the following is NOT correct

1.  There is broader distribution of speed among molecules at higher temperatures

2.  At lower temperatures there are more molecules which have the average speed

3.  At higher temperatures the average speed is greater

4.  At lower temperatures there are more molecules in motion

4

At lower temperatures there are more molecules in motion

Explanation :
No Explanation available for this question

# Aluminium foil used for cooking food and storage sometimes has one shiny surface and one dull surface. Should the shiny side or the dull side be on the outside when the food is wrapped for baking and freezing, respectively

1.  Shiny side, shiny side

2.  Dull side, dull side

3.  Shiny side, dull side

4.  Dull side, shiny side

4

Dull side, shiny side

Explanation :
No Explanation available for this question

# An electric light fixture weighing 150N hangs from a point A by two hinges AB and AC. The tension is string AB would be approximately

1.  78N

2.  86N

3.  99N

4.  98N

4

78N

Explanation :
No Explanation available for this question

# A string 2m long is tied to the ends of a uniform rod that weighs 60N and is 1.6m long.The string passes over a nail so that the rod hangs vertically. The tension in the string will be

1.  24N

2.  30N

3.  42N

4.  50N

4

50N

Explanation :
No Explanation available for this question

# A mass of 1kg is attached to the middle of a rope which is being pulled from both ends in the opposite directions. Taking g=10m/sec2, the minimum pull required to completely straighten the rope will be

1.  5N

2.  20N

3.  25N

4.  ∞

4

Explanation :
No Explanation available for this question

# Your finger sticks to an ice tray just taken from the refrigerator. Which factor has more effect on this phenomenon

1.  The inside temperature of the freezer (Suppose it’s working properly)

2.  The humidity of the air

3.  The heat capacity of both your finger and the tray

4.  The thermal conductivity of the tray

4

The thermal conductivity of the tray

Explanation :
No Explanation available for this question

# For the distribution curves shown, which of the following is NOT correct

1.  There is broader distribution of speed among molecules at higher temperatures

2.  At lower temperatures there are more molecules which have the average speed

3.  At higher temperatures the average speed is greater

4.  At lower temperatures there are more molecules in motion

4