List of top Mechanical Engineering Questions

Select the correct statement from the following.
A positive rake angle is generally preferred for:
The cutting tool moves in a vertical reciprocating motion in which of the following machine tool?
In an orthogonal cutting, rake angle (\( \alpha \)) of the tool is 25° and friction angle (\( \lambda \)) is 27°. Using Merchant's shear angle relationship, the value of shear angle (\( \phi \)) is:
The shear strength of a sheet metal is 300 MPa. The blanking force required to produce a blank of 100 mm diameter from a 2 mm thick sheet is close to
In cold working of metals, the working temperature is
A stock of thickness 30 mm is to be rolled to 10 mm in a single stage. What is the minimum diameter of the rolls, if the maximum angle of bite is 60°?
Straight polarity in arc welding is obtained with
Which one of the following is a solid state joining process?
In which of the following process, the state of stress of the material undergoing deformation is only shear?
Name the four processes A, B, C, and D, shown in Figure, in the same sequence.
Select the correct statement for the riser design
A spherical drop of molten metal of radius 5 mm was found to solidify in 12 s. In how much time will a similar drop of radius 10 mm solidify?
In a gating system, the ratio of 1:2:4 represents:
For a ductile material, toughness is a measure of
The coordination number for a Body-Centred Cubic (BCC) structure is
Primary object of full annealing is to
If H is the available head for a hydraulic turbine, the speed (N), the discharge (Q), and the power (P), respectively are proportional to
According to the direction of flow through the runner, Kaplan turbine is a:
For stable equilibrium of floating bodies, the centre of gravity has to:
Which of the following represents the equation of continuity for a steady compressible fluid? \( \vec{V} \) represents the velocity vector; \( \rho \) represents density
A Pitot-tube is used for measuring
A fluid, with viscosity 1.5 Pa.s and density 1260 kg/m³, flows at a velocity of 5 m/s in a 150 mm diameter pipe. The Reynolds number is:
According to the Darcy--Weisbach equation, the loss of head for flow through a circular pipe is (\( L \)-length of the pipe, \( D \)-diameter of the pipe, \( V \)-velocity of flow, \( f \)-friction factor)

Identify the correct combination of turbines classification based on the head of the water.