Which one of the following statements is true to two-dimensional flow of ideal fluids?

In modern boilers, stacks alone can not create enough mechanical draught because

Which one of the following statements is true to two-dimensional flow of ideal fluids?

Which of the following can-not be caused by a hot spark plug?
1. Pre-ignition
2. Post-ignition
3. Detonation
4. Run on-ignition
Select the correct answer using the code given below
Code:

A tank contains 100 kg of liquid water and 5 kg of water vapour under saturation conditions at 20°C. If the specific volume of saturated vapour at that temperature is 57.8 m³/kg, what is the approximate volume of the tank?