General Knowledge MCQs
Topic Notes: General Knowledge
MCQs and preparation resources for competitive exams, covering important concepts, past papers, and detailed explanations.
Plato
- Biography: Ancient Greek philosopher (427–347 BCE), student of Socrates and teacher of Aristotle, founder of the Academy in Athens.
- Important Ideas:
- Theory of Forms
- Philosopher-King
- Ideal State
3861
What is 'Torque'?
Answer:
A measure of the force that can cause an object to rotate
Torque is the rotational equivalent of linear force. It is a measure of the force that can cause an object to rotate about an axis.
3862
What is a 'Clutch'?
Answer:
A mechanical device that engages and disengages power transmission between shafts
A clutch is a mechanical device that engages and disengages power transmission, especially from a driving shaft to a driven shaft.
3863
What is a 'Cam'?
Answer:
A rotating mechanical link used to transform rotary motion into linear motion
A cam is a rotating or sliding piece in a mechanical linkage used especially in transforming rotary motion into linear motion.
3864
What is 'Milling'?
Answer:
The process of machining using rotary cutters to remove material
Milling is the process of machining using rotary cutters to remove material by advancing a cutter into a workpiece.
3865
What is 'Lathe'?
Answer:
A machine tool that rotates the workpiece to perform operations like turning, facing, etc.
A lathe is a machine tool that rotates a workpiece about an axis of rotation to perform various operations such as cutting, sanding, knurling, drilling, deformation, facing, and turning.
3866
What is 'Soldering'?
Answer:
Joining metals using a filler metal with a melting point below 450°C
Soldering is a process in which two or more items are joined together by melting and putting a filler metal (solder) into the joint, the filler metal having a lower melting point than the adjoining metal.
3867
What is 'Welding'?
Answer:
Joining metals by melting the base metal and adding filler
Welding is a fabrication process that joins materials, usually metals or thermoplastics, by using high heat to melt the parts together and allowing them to cool, causing fusion.
3868
What is 'Toughness'?
Answer:
The ability of a material to absorb energy and deform without fracturing
Toughness is the ability of a material to absorb energy and plastically deform without fracturing.
3869
What is 'Hardness'?
Answer:
Resistance to localized plastic deformation (e.g., indentation or scratching)
Hardness is a measure of the resistance to localized plastic deformation induced by either mechanical indentation or abrasion.
3870
What is 'Malleability'?
Answer:
Ability to be hammered or pressed into thin sheets
Malleability is a material's ability to deform under compressive stress; this is often characterized by the material's ability to form a thin sheet by hammering or rolling.