Psn Construction Equipment Interview Questions and Answers

A variable force is a force that changes in magnitude or direction over time.

• It can be caused by changes in velocity, acceleration, or position.

• Examples include a swinging pendulum, a car accelerating or decelerating, or a rocket changing direction.

• It is important to consider variable forces when calculating motion and energy.

• Variable forces can be represented graphically using force vs. time or force vs. displacement graphs.

An artificial kidney is a medical device that performs the functions of a natural kidney.

• It is designed to filter waste and excess fluids from the blood

• It is used to treat patients with kidney failure

• There are two types: hemodialysis and peritoneal dialysis

• Hemodialysis uses a machine to filter the blood outside the body

• Peritoneal dialysis uses the lining of the abdomen to filter the blood inside the body

A covalent bond is a chemical bond formed by the sharing of electrons between two atoms.

• It is a type of chemical bond where two atoms share electrons to achieve stability.

• It is formed between non-metal atoms.

• The shared electrons are attracted to the nuclei of both atoms, holding them together.

• Examples include the bond between hydrogen and oxygen in water (H2O) and the bond between carbon and hydrogen in methane (CH4).

Increasing friction can be done by changing the surface texture or adding weight to the object.

• Increase the roughness of the surface in contact

• Add weight to the object

• Increase the force pushing the objects together

• Use materials with higher coefficients of friction

• Increase the surface area in contact

• Use adhesives or suction cups

• Create a vacuum between the surfaces

The heart is a muscular organ that pumps blood throughout the body.

• The heart has four chambers: the right atrium, right ventricle, left atrium, and left ventricle.

• Deoxygenated blood enters the right atrium and is pumped into the right ventricle, which then pumps it to the lungs for oxygenation.

• Oxygenated blood returns to the heart via the left atrium and is pumped into the left ventricle, which then pumps it to the rest of the body.

• The heart's contractions are controlled by e...read more