Casting Effects Friction Velocity Distribution Online Exam Quiz
Casting Effects Friction Velocity Distribution GK Quiz. Question and Answers related to Casting Effects Friction Velocity Distribution. MCQ (Multiple Choice Questions with answers about Casting Effects Friction Velocity Distribution
For a smooth conduit, which of the following is the value of friction factor (f) for laminar and turbulent flow respectively?
Options
A : 10/Re, 0.0791(Re)-0.25
B : 16/Re, 0.0791(Re)-0.25
C : 10/Re, 0.0771(Re)-0.25
D : 16/Re, 0.0171(Re)-0.25
Gating design for a mould of 50cm*25cm*15cm is shown in below figure. The cross-sectional area of the gate is 5 cm2. Neglecting friction and velocity distribution effects, what is the filling time (t) for the design (in second)?
Options
A : 19.25
B : 21.86
C : 34.21
D : 10.39
Which of the following ways can use for stopping the rapid solidification of the molten metal in the mould?
Options
A : By having the mould of high permeability
B : By making a uniform flow of molten metal
C : By creating high pressure on the molten metal
D : By using too much superheat
Why is Velocity of a fluid in contact with any solid surface is zero?
Options
A : Due to cohesive forces in the fluid particles
B : Due to low velocity of fluid
C : Due to no slip condition
D : Due to high intermolecular forces between the fluid particles
The energy loss due to friction (Ef) in a circular conduit (on the basis of per unit mass) is given by_____
Options
A : Ef = 4fLv?²/2D
B : Ef = 8fLv?²/2D
C : Ef = 4fLv?³/2D
D : Ef = 4fLv?²/D
Which of the following reasons is the incorrect reason for frictional losses in the conduit?
Options
A : Gradual change in flow direction
B : Sudden contraction of the flow cross-sections
C : Sudden enlargement of the flow cross-sections
D : Due to irrotational flow of molten metal
Which of the following terms is modified in the integrated energy balance equation for non-uniform velocity distribution?
Options
A : Potential energy
B : Kinetic energy
C : Pressure energy
D : Thermal energy
The velocity distribution within the conduit depends on _____
Options
A : shape of the conduit and nature of flow
B : temperature of the molten metal
C : impurities present in the molten metal
D : type of the molten metal
Friction loss factor (e?) in the conduit of liquid metal depends on _____
Options
A : temperature of the molten metal
B : presence of dross in the molten metal
C : ratio of the flow area and Reynolds no. of the flow
D : whirling of the molten metal
Which of the following gating designs is used to avoid the splashing of the molten metal in the mould?
Options
A : Vertical gating
B : Horizontal gating
C : Inclined gating
D : Bottom gating
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