GATE XE format:nat PYQs & Answers — Page 15

Questions 141–150 of 668. Imported answers require independent review unless marked reviewed.

Topic practice 668 questionsPage 15 of 67

A circular water jet of diameter 50 mm impinges with a velocity of 18 m/s normal to a plate. The density of water is 1000 kg/m

and gravity force is neglected.

Diagram for Engineering Sciences question 38

The magnitude of net force (in N, rounded off to two decimal places) imparted by the jet on the stationary plate is ______________.

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Consider the steady, incompressible flow of water in a horizontal pipe of constant diameter 1 m with an inlet velocity of 12 m/s.

Diagram for Engineering Sciences question 39

As shown in figure, water is lost through a circular hole of diameter 0.6 m at the rate of 4.53 m

/s. The outlet velocity (in m/s, rounded off to two decimal places) of water in the pipe is ______.

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

The axial velocity profile of a laminar, incompressible and fully-developed flow in a circular pipe of radius (R) is given as

, where

, and

are radial direction, axial direction, fluid viscosity, and pressure, respectively. If the average velocity of the flow is given by

, then the value of K (answer in integer) is _____.

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

The velocity potential function in a two-dimensional flow field is given by

m²/s where

per second and

per second. The magnitude of the velocity (in m/s, answer in integer) at

m is _____.

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Consider the incompressible, steady and irrotational flow through a concentric reducer in a horizontal pipeline. The pipe diameter reduces from

cm to

cm as shown in figure. The pressure at position 1 and position 2 of the reducer is

kPa and

kPa, respectively. The specific weight of fluid is 7 kN/m³. Acceleration due to gravity is 10 m/s².

Diagram for Engineering Sciences question 42

Neglecting frictional effects, the mass flow rate (in kg/s, rounded off to two decimal places) of the fluid through the reducer is _____.

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Consider the incompressible fluid flow over a flat plate with a free stream velocity,

m/s. The fluid kinematic viscosity is

m²/s and density is 1 kg/m³. The velocity profile within the boundary layer at any location

is given by

, where boundary layer thickness,

. The local wall shear stress at

m from the leading edge is _____ × 10⁻³ N/m² (rounded off to two decimal places).

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

The work done by a body expanding from an initial state A to the final state B, as shown in the P-V diagram below, is (in units of litre-atm) __________ (rounded off to nearest integer).

Diagram for Engineering Sciences question 52

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

At room temperature, the electrical conductivity and electron mobility for aluminium are 3.8 × 10^7 (Ω m)^−1 and 0.0012 m^2 (V s)^−1, respectively. Density of free electrons for aluminium at room temperature is (in units of m^−3) ______ × 10^27 (rounded off to nearest integer).

Given: Electrical charge on an electron is 1.6 × 10^−19 C.

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

A 2 mm thick palladium sheet of 1000 mm

cross section is used as a diffusional membrane to purify hydrogen. The hydrogen concentration is maintained at a steady state with

kg m

and

kg m

on the two sides of the membrane as shown in the figure below.

Diagram for Engineering Sciences question 63

The rate of hydrogen purification is (in units of kg hr

) ______ × 10

(rounded off to one decimal place).

Given: The diffusion coefficient of hydrogen in palladium is 1.0 × 10

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

In X-ray powder diffraction pattern obtained from a face centered cubic (FCC) metal, the first five reflections are at θ = 21.65°, 25.21°, 37.06°, x and 47.58°. The Bragg angle, θ of the fourth reflection is missed out and is represented by x. The value of x is (in degree) __________ (rounded off to one decimal place).

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

GATE XE format:nat PYQs

Question 38

Question 39

Question 40

Question 41

Question 42

Question 43

Question 52

Question 62

Question 63

Question 64