Assessment Test-8 Everyday Science (MCQs)

If we are at sea level our atmosphere presses down on us with a pressure of:

• (A) 1 pounds per square inch 
• (B) 14.7 pounds per square inch 
• (C) 35.8 pounds per square inch 
• (D) None of these

The efficiency of a machine is:

• (A) Always greater than 100%
• (B) Always less than 100%
• (C) Always 100%
• (D) None of these

A material with high elasticity:

• (A) Does not return to its original shape upon being stretched and then released
• (B) Returns as close as possible to its original shape upon being stretched and then released
• (C) Can be stretched to infinite distances
• (D) None of these

Matter and energy:

• (A) Can be converted from one to the other
• (B) When taken together, converted in all processes in a closed system
• (C) Both A & B
• (D) None of these

Electric current:

• (A) Flows from a higher potential to lower potential
• (B) Is caused by flow of electrons
• (C) Both A & B
• (D) None of these

Electricity and magnetism are:

• (A) Two facets of the same force
• (B) Always opposed to each other
• (C) Both A & B
• (D) None of these

Ball bearings help wheels and other rotating objects:

• (A) Move without consuming any energy
• (B) Rotate more easily and with less friction
• (C) Both A & B
• (D) None of these

Photography works by:

• (A) Capturing the souls of the objects being photographed
• (B) Capturing light reflected from the object being photographed
• (C) Both A & B
• (D) None of these

Arthur C. Clarke, the famous science fiction author, while working as a radio operator in the British army in World War-II:

• (A) Proposed building a space elevator from carbon mono-filaments
• (B) Postulated the existence of extra- terrestrial artifacts on the Moon
• (C) Proposed that a network of satellites in stationary orbit at very high altitudes around the Earth be used to bounce communication signals all over the world
• (D) None of these

The Sino Pakistani Jf-17 thunder aircraft:

• (A) Is a commercial transport aircraft
• (B) Is neither built nor assembled in Pakistan
• (C) Has no stealth features in its engine inlets or elsewhere
• (D) None of these