Related Questions

The type of D.C. motor used for shears and punches is
A Shunt motor
B Series motor
C Differential computed D.motor
D Cumulative compound D.C. motor
In blanking operation, the clearance is provided on
A Punch
B Die
C Half on the punch and half on the die
D Either on punch or die depending upon designer's choice
The strain energy stored in a body due to shear stress, is (where $$\tau $$ = Shear stress, C = Shear modulus and V = Volume of the body)
A $$\frac{{\tau {\text{V}}}}{{2{\text{C}}}}$$
B $$\frac{{2{\text{C}}}}{{\tau {\text{V}}}}$$
C $$\frac{{{\tau ^2}{\text{V}}}}{{2{\text{C}}}}$$
D $$\frac{{2{\text{C}}}}{{{\tau ^2}{\text{V}}}}$$
The cutting force in punching and blanking operations mainly depends on
A The modulus of elasticity of metal
B The shear strength of metal
C The bulk modulus of metal
D The yield strength of metal
Blanking and piercing operations can be performed simultaneously in a
A Simple die
B Progressive die
C Compound die
D Combination die
In metal cutting operations, the shear angle is the angle made by the shear plane with the
A Direction of the tool axis
B Direction of tool travel
C Perpendicular to the direction of the tool axis
D Central plane of the workpiece
Shear strength of the welded joint for double parallel fillet is (where $$\tau $$ = Allowable shear stress for weld metal)
A $$0.5\,{\text{s}}l\tau $$
B $${\text{s}}l\tau $$
C $$\sqrt 2 \,{\text{s}}l\tau $$
D $$2\,{\text{s}}l\tau $$
The operation of producing cup shaped parts from flat sheet metal blanks by bending and plastic flow of metal, is known as
A Drawing
B Squeezing
C Coining
D Planishing
The ratio of shear stress and shear strain of an elastic material, is
A Modulus of Rigidity
B Shear Modulus
C Modulus of Elasticity
D Both A and B
A closely coiled helical spring is acted upon by an axial force. The maximum shear stress developed in the spring is $$\tau $$. The half of the length of the spring if cut off and the remaining spring is acted upon by the same axial force. The maximum shear stress in the spring in new condition will be
A $$\frac{\tau }{2}$$
B $$\tau $$
C $$2\tau $$
D $$4\tau $$

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