30 Questions
Which material are pressure vessels usually not made of?
Any of the above
Which of the following is usually considered a thin cylinder?
All of the above
How do longitudinal stresses act in relation to the longitudinal axis of a shell?
Either of the above
What is the radial stress in a spherical pressure vessel?
Half of hoop stress
What are cylindrical vessels with wall thickness not small (t ≥d/20) classified as?
Thick cylinders
What is true for shrink fits?
Used if parts should not be disassembled for life
What does the term 'Gatorizing' refer to?
Producing flutes or corrugations
When is the chemical reduction process commonly used?
All metals which are extracted as ore
What type of chips does plain milling of mild steel plate produce?
Regular shaped discontinuous chips
What is the purpose of the fullering process?
First step in impression die forging which reduces cross-section of work piece
What do coining and embossing operations involve?
Forming and pressing operations, respectively
In a single spindle automatic lathe, how many tools are mounted on the turret?
Two
What type of stress is induced in the wire material of a closely coiled helical spring when subjected to a couple about its axis?
A combination of torsional shear stress and bending
Where is the hoop stress maximum in a thick cylinder pressurized from inside?
At the outer radius
What is the purpose of an idler pulley?
To maintain belt tension
How are rivets classified?
Thickness of plate
What is the position of a shaft inside a bearing when it rotates in an anticlockwise direction at high speed?
Towards left side of the bearing not making metal to metal contact
What happens at the critical speed of a shaft?
It becomes dynamically unstable with large vertical amplitudes
What is the stress that can be used to design a shaft subjected to combined bending and torsion?
Any of the above
In a belt drive, what phenomenon describes the loss of power due to slippage?
Loss of power
What does the designation '6 x 7' of a wire rope indicate?
Number of wires in each strand
In a V-belt drive system, what is the usual range for the groove angle of the pulley?
24° to 30°
What does Euler's formula with 5 to 10% error in crippling load compare to experimental results in practice suggest?
The assumptions made in using the formula are not in practice
What determines the velocity ratio of two pulleys connected by an open belt or crossed belt?
Directly proportional to the square of their diameters
What should be done if a vessel is considered thin-walled?
Decrease number of divisions or increase pitch
How is a commonly used 30 mm H-hole with tolerance grade IT9 expressed?
30HIT9
Where are the sets of blocks that architectural firms and mechanical design companies use usually housed?
Block libraries
When creating your own blocks, what layer should you avoid drawing any portion of the block in?
Center line layer
What is lancing in the context of metalworking?
Cutting in a single line across the metal strip to allow bending in the operation
In machining, which materials would tools with higher cutting angles typically be used for?
Aluminum and magnesium alloy
Test your knowledge on metal cutting processes, including shear angle, types of chips, cutting forces, power consumption, tool life, and surface finish. Also includes questions on Gatorizing and chemical reduction processes.
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