Friction at the tool-chip interface can be reduced by
Answer: D
The cutting forces decrease with an increase in cutting speed, but it is substantially smaller than the increase in speed. With the increase in speed, friction decreases at the tool chip interface. The thickness of chip reduces by increasing the speed.
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In a CNC program block, N002 GO2 G91 X40 Z40......, GO2 and G91 refer to
Answer: C
GO2 represent circular interpolation in clockwise direction.
G91 represent incremental dimension.
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What is the type of joining process called, where the parts to be welded are kept in contact and rotated relative to each other and axial pressure is applied when the desired temperature is obtained?
Answer: D
Friction welding is a type of joining process where the parts to be welded are kept in contact and rotated relative to each other and axial pressure is applied when the desired temperature is obtained.
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The mechanism of material removal in EDM process is
Answer: A
In EDM, the thermal energy is employed to melt and vaporize tiny particles of work material by concentrating the heat energy on a small area of the work-piece.
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If the tearing efficiency of a riveted joint is 50%, then ratio of rivet hole diameter to the pitch of rivets is
Answer: C
No answer description available for this question.
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The effective number of lattice points in the unit cell of simple cubic, body centered cubic, and face centered cubic space lattices, respectively, are
Answer: B
The effective number of lattice points in the unit cell of
Simple cubic = (1/8) × 8 = 1
Body centred cubic = (1/8) × 8 +1 = 2
Face centred cubic = (1/8) × 8 + (1/2) × 6 = 4
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In ultrasonic machining, tool is made of
Answer: B
No answer description available for this question.
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In a metal arc welding process, a gas metal arc welding with magnetized flux is used and can be done in all the positions i.e. flat position, vertical position or inclined position.
Answer: C
GMAW practice is a gas metal arc welding with magnetized flux and this type of welding can be done successfully on most of the commercial metals, if proper welding wire and proper gases are chosen and the proper settings are made. It can be done in all the positions i.e. flat position, vertical position or inclined position.
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The operation in which oil is permeated into the pores of a powder metallurgy product is known as
Answer: C
If the pores in a sintered compact are filled with oil, the operation is called as impregnation. The lubricants are added to the porous bearings, gears and pump rotors etc.
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When two main plates are kept in alignment butting each other and riveted with cover plate on both sides of the main plates with two rows of rivets in each main plate, the joint is known as _______ double cover butt joint.
Answer: B
No answer description available for this question.
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