NDA Practice Questions — All Questions
19 questions
The value of sin 30 degrees is:
- a.1
- b.1/2✓
- c.0
- d.√3/2
sin 30° = 1/2.
If x^2 = 49, the positive value of x is:
- a.7✓
- b.14
- c.24.5
- d.9
x = √49 = 7.
The value of 2^5 is:
- a.10
- b.16
- c.32✓
- d.25
2^5 = 32.
cos 0 degrees equals:
- a.0
- b.1/2
- c.√3/2
- d.1✓
cos 0° = 1.
The sum of angles in a triangle is:
- a.90 degrees
- b.180 degrees✓
- c.270 degrees
- d.360 degrees
A triangle's interior angles sum to 180°.
Solve: 4x - 8 = 0.
- a.x = 2✓
- b.x = 4
- c.x = 8
- d.x = -2
4x = 8, so x = 2.
The value of 15% of 200 is:
- a.15
- b.25
- c.30✓
- d.45
0.15 x 200 = 30.
Choose the correct spelling:
- a.Neccessary
- b.Necessary✓
- c.Necesary
- d.Neccesary
'Necessary' has one c and two s.
The synonym of 'courageous' is:
- a.Brave✓
- b.Timid
- c.Weak
- d.Fearful
'Courageous' means brave.
Fill in: 'He has been ill ___ Monday.'
- a.for
- b.from
- c.since✓
- d.by
'Since' is used with a point in time (Monday).
Choose the correct sentence:
- a.Each of the boys are here
- b.Each of the boys were here
- c.Each of the boys have come
- d.Each of the boys is here✓
'Each' is singular and takes 'is'.
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.