List of top Fluid Mechanics and Thermal Sciences Questions asked in GATE Mechanical Engineering

A tube of uniform diameter $D$ is immersed in a steady flowing inviscid liquid stream of velocity $V$, as shown in the figure. Gravitational acceleration is $g$. The volume flow rate through the tube is ________________.

In a vapour compression refrigeration cycle, the refrigerant enters the compressor in saturated vapour state at evaporator pressure with enthalpy 250 kJ/kg. The exit of the compressor is at 300 kJ/kg. COP of the cycle is 3. The refrigerant after condensation is throttled to evaporator pressure. If the enthalpy of saturated liquid at evaporator pressure is 50 kJ/kg, the dryness fraction at entry to evaporator is ________________.

Consider 1 kg of an ideal gas at 1 bar and 300 K contained in a rigid and perfectly insulated container. The specific heat at constant volume is \( c_v = 750\ \text{J kg}^{-1}\text{K}^{-1} \). A stirrer performs 225 kJ of work on the gas. Assume no heat interaction. The final pressure of the gas will be ________________ bar (integer).

The velocity field in a fluid is given to be \[ \vec{V} = (4xy)\,\hat{i} + 2(x^{2} - y^{2})\,\hat{j}. \] Which of the following statement(s) is/are correct?

Which of the following non-dimensional terms is an estimate of Nusselt number?

Consider a steady flow through a horizontal divergent channel, as shown in the figure, with supersonic flow at the inlet. The direction of flow is from left to right. Pressure at location B is observed to be higher than that at an upstream location A. Which among the following options can be the reason?

Which one of the following is an intensive property of a thermodynamic system?