CEA Class:8

The efficiency of idle (perfect) machine is:

• Always less than 100%

• Equal to 100%

• Always more than 100%

• Always 50%

On which direction does liquid exerts pressure?

• Only upward

• Only downwards

• In all directions

• Only on lateral sides

Which clock measures the accurate time?

• Atomic clock

• Sand clock

• Digital clock

• Pendulum clock

One day is equal to how many seconds:

• 3600 seconds

• 48600 seconds

• 86400 seconds

• 864080 seconds

Formula to calculate momentum is:

• P=m×v

• P=g×h

• P=hdg

• P=F:A

In which law of Newton does the launching of rocket works:

• First

• Second

• Third

• Fourth

Which of the following consists of kinetic energy?

• Burning coal

• Running water

• Light bulb

• Ringing bell

The critical angle for diamond is:

• 49°

• 42°

• 24°

• 50°

Which one is not planet?

• Earth

• Mercury

• Jupiter

• Pluto

Which one is acid?

• NaOH

• KOH

• Mg(OH)2

• HCOOH