Namma kalvi's pen quiz 2018
s nimal krishna kanth
9TH PRIZE & 10TH PRIZE
know about pen
- A pen is a common writing instrument used to apply ink to a surface, usually paper, for writing or drawing.
- A ballpoint pen dispenses an oil-based ink by rolling a small hard sphere, usually 0.5–1.2 mm and made of brass, steel, or tungsten carbide. The ink dries almost immediately on contact with paper.
- A rollerball pen dispenses a water-based liquid or gel ink through a ball tip similar to that of a ballpoint pen. The less-viscous ink is more easily absorbed by paper than oil-based ink, and the pen moves more easily across a writing surface.
- A fountain pen uses water-based liquid ink delivered through a nib. The ink flows from a reservoir through a "feed" to the nib, then through the nib, due to capillary action and gravity. The nib has no moving parts and delivers ink through a thin slit to the writing surface.
- A felt-tip pen, or marker, has a porous tip of fibrous material. The smallest, finest-tipped felt-tip pens are used for writing on paper. Medium-tipped felt-tips are often used by children for coloring and drawing.
- A gel pen uses ink in which pigment is suspended in a water-based gel. Because the ink is thick and opaque, it shows up more clearly on dark or slick surfaces than the typical inks used in ballpoint or felt tip pens.
- A stylus pen, plural styli or styluses, is a writing utensil or a small tool for some other form of marking or shaping, for example, in pottery. It can also be a computer accessory that is used to assist in navigating or providing more precision when using touchscreens.
- There is no lead pen. The tip (0.7 or 0.5 mm) of a mechanical or tip pencil is called lead. Because it is made up of lead - a chemical element. Lead is a poisonous material. It may cause
- decreased bone and muscle growth
- poor muscle coordination
- damage to the nervous system, kidneys, and/or hearing
- speech and language problems
- developmental delay
- seizures and unconsciousness (in cases of extremely high lead levels)
- So don't eat it!
powered by Namma Kalvi.