NDA Practice Questions — All Questions

The SI unit of force is the:

• a.Joule
• b.Newton✓
• c.Watt
• d.Pascal

Force is measured in newtons (N).

The chemical symbol for gold is:

• a.Au✓
• b.Ag
• c.Gd
• d.Go

Gold's symbol is Au (from Latin 'aurum').

The speed of light in a vacuum is approximately:

• a.3,000 km/s
• b.30,000 km/s
• c.300,000 km/s✓
• d.3,000,000 km/s

Light travels about 300,000 km per second in a vacuum.

The Earth revolves around the:

• a.Moon
• b.Mars
• c.Its own axis only
• d.Sun✓

The Earth revolves around the Sun (and rotates on its axis).

Which is a noble (inert) gas?

• a.Oxygen
• b.Helium✓
• c.Nitrogen
• d.Hydrogen

Helium is a noble (inert) gas.

The instrument used to measure atmospheric pressure is the:

• a.Barometer✓
• b.Thermometer
• c.Ammeter
• d.Speedometer

A barometer measures atmospheric pressure.

The highest mountain above sea level is:

• a.K2
• b.Kangchenjunga
• c.Mount Everest✓
• d.Nanda Devi

Mount Everest is the highest mountain above sea level.

Water is made of hydrogen and:

• a.Nitrogen
• b.Carbon
• c.Chlorine
• d.Oxygen✓

Water (H2O) is hydrogen and oxygen.