NDA Practice Questions — All Questions
19 questions
The value of sin 30 degrees is:
- a.√3/2
- b.1
- c.0
- d.1/2✓
sin 30° = 1/2.
If x^2 = 49, the positive value of x is:
- a.9
- b.14
- c.7✓
- d.24.5
x = √49 = 7.
The sum of angles in a triangle is:
- a.270 degrees
- b.360 degrees
- c.180 degrees✓
- d.90 degrees
A triangle's interior angles sum to 180°.
Solve: 4x - 8 = 0.
- a.x = -2
- b.x = 8
- c.x = 2✓
- d.x = 4
4x = 8, so x = 2.
The value of 15% of 200 is:
- a.30✓
- b.25
- c.45
- d.15
0.15 x 200 = 30.
Choose the correct spelling:
- a.Necessary✓
- b.Neccesary
- c.Necesary
- d.Neccessary
'Necessary' has one c and two s.
The synonym of 'courageous' is:
- a.Timid
- b.Brave✓
- c.Weak
- d.Fearful
'Courageous' means brave.
Fill in: 'He has been ill ___ Monday.'
- a.since✓
- b.for
- c.from
- d.by
'Since' is used with a point in time (Monday).
Choose the correct sentence:
- a.Each of the boys have come
- b.Each of the boys were here
- c.Each of the boys is here✓
- d.Each of the boys are here
'Each' is singular and takes 'is'.
The SI unit of force is the:
- a.Joule
- b.Pascal
- c.Newton✓
- d.Watt
Force is measured in newtons (N).
The chemical symbol for gold is:
- a.Gd
- b.Au✓
- c.Go
- d.Ag
Gold's symbol is Au (from Latin 'aurum').
The speed of light in a vacuum is approximately:
- a.3,000,000 km/s
- b.3,000 km/s
- c.30,000 km/s
- d.300,000 km/s✓
Light travels about 300,000 km per second in a vacuum.
The Earth revolves around the:
- a.Mars
- b.Sun✓
- c.Its own axis only
- d.Moon
The Earth revolves around the Sun (and rotates on its axis).
Which is a noble (inert) gas?
- a.Nitrogen
- b.Hydrogen
- c.Helium✓
- d.Oxygen
Helium is a noble (inert) gas.
The instrument used to measure atmospheric pressure is the:
- a.Thermometer
- b.Speedometer
- c.Ammeter
- d.Barometer✓
A barometer measures atmospheric pressure.
The highest mountain above sea level is:
- a.Nanda Devi
- b.Kangchenjunga
- c.K2
- d.Mount Everest✓
Mount Everest is the highest mountain above sea level.
Water is made of hydrogen and:
- a.Nitrogen
- b.Carbon
- c.Oxygen✓
- d.Chlorine
Water (H2O) is hydrogen and oxygen.