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Browse complete papersThe point of contraflexure occurs where _____.
Load intensity is zero
Bending moment changes sign
Bending moment is maximum
Shear force is zero
Correct answer
Load intensity is zero
What is the main chemical change that occurs on the metal surface during anodizing?
Removal of the oxide layer
Formation of a thick oxide layer
Deposition of metallic ions
Dissolving the metal away
Correct answer
Removal of the oxide layer
Which property of rubber-based coatings makes them suitable for protecting steel pipes in industrial environments?
The coating provides high levels of thermal conductivity for the pipes
The coating's flexibility prevents cracking under vibration and resists chemical attack
The coating's color remains durable even with prolonged sunlight exposure
The coating improves the electrical conductivity of the pipe surface
Correct answer
The coating provides high levels of thermal conductivity for the pipes
The maximum bending moment for a simply supported beam of span L with uniformly distributed load (UDL) w per unit length is _____.
\(\frac{WL^2}{12}\)
\(\frac{WL^2}{2}\)
\(\frac{WL^2}{16}\)
\(\frac{WL^2}{8}\)
Correct answer
\(\frac{WL^2}{12}\)
Which of the following is an example of a positive displacement air compressor?
Axial flow compressor
Radial dynamic compressor
Centrifugal compressor
Reciprocating piston compressor
Correct answer
Axial flow compressor
Which of the following is not a type of friction?
Rolling friction
Kinetic friction
Gravitational friction
Static friction
Correct answer
Rolling friction
The saddle of a lathe carriage:
Controls spindle speed automatically
Moves the lead screw mechanism
Rotates the workpiece against tool
Supports the cross-slide and tool post
Correct answer
Controls spindle speed automatically
The lathe bed is designed with which type of guideways?
Triangular
Inverted V and flat combination
Rectangular
Circular
Correct answer
Triangular
A component in a high-impact environment requires resistance to fracture with minimal deformation. Which material property would be most critical to avoid premature failure?
Low brittleness with low stiffness
High brittleness with high elasticity
High brittleness with low ductility
Low brittleness with high toughness
Correct answer
Low brittleness with low stiffness
For drilling a hole on a lathe, the drilling tool is placed in the ______.
carriage
tool post
tailstock
chuck
Correct answer
carriage