The figure below shows water flowing through a pipe. The pressure difference between points P and Q measured using a water-over-mercury manometer is <img src="/images/question-image/metallurgical-engineering/miscellaneous-in-metallurgy/1684344863-M2-B-19-80.PNG" title="Miscellaneous in Metallurgy mcq question image" alt="Miscellaneous in Metallurgy mcq question image">

The figure below shows the cumulative size distribution of particles of a crushed mineral. 10 kg of this material is first passed through a sieve of size 400 micron and then through a sieve of size 300 micron. The weight of mineral (in kg ) that is retained on the 300 micron sieve is . . . . . . . .

A

1

B

1.8

C

3

D

5.6

Pressure difference between two points in vessels, pipelines or in two different pipelines can be measured by a differential manometer. The pressure difference measured as the mm of water coloumn in case of mercury-water, differential manometer is equal to (where, H = difference in height of mercury column in mm).

A

H

B

12.6 H

C

13.6 H

D

14.6 H

The figure below shows a schematic of a water droplet placed on the surfaces of two mineral P and Q.

Given this information, pick the correct statement from the following:

A

Mineral P ascends with air bubbles preferentially over mineral Q

B

Mineral Q ascends with air bubbles preferentially over mineral P

C

Both minerals P and Q ascend with the air bubbles without preference

D

Both minerals P and Q sink to the bottom

A mercury (specific gravity = 13.6) manometer connected across an orificemeter fitted in a pipe shows a manometer reading of 2 cms. If the manometer liquid is changed to carbon tetrachloride (specific gravity = 1.6), then for the same flow rate of water the new manometer reading will be __________ cms.

A

17

B

42

C

84

D

1.8

A student wants to find the absolute pressure of water at a point below the surface of water. He has a barometer and a manometer pressure gauge. The barometer reads 1.3152 bar where as the manometer pressure gauge reads 0.3152 bar. What is the absolute pressure? (Assume that pressure at one end of the manometer is atmospheric.)

A

1 bar

B

1.6304 bar

C

0.3152 bar

D

1.3152 bar

Thin layer of material B (of total amount m) is plated on the end faces of two long rods of material A. These are then joined together on the plated side (see the figure below) and heated to a high temperature. Assuming the diffusion coefficient of B in A is D, the composition profile CB along the rod axis x after a time t is described by

A

$${C_B} = \frac{m}{{2\sqrt {\pi Dt} }}\exp \left$$

B

$${C_B} = \frac{m}{{2\sqrt {\pi Dt} }}erf\left$$

C

$${C_B} = \frac{m}{{2\sqrt {\pi Dt} }}\left$$

D

$${C_B} = \frac{m}{{2\sqrt {\pi Dt} }}t$$

Match the heat treatment for an eutectoid steel shown in the TTT diagram below (as P, Q, R and S) with the resulting microstructure listed below:
1. Fine pearlite
2. martensite
3. Bainite
4. Coarse pearlite

A

P-1, Q-2, R-4, S-3

B

P-4, Q-1, R-3, S-2

C

P-2, Q-1, R-3, S-4

D

P-1, Q-4, R-3. S-2

The right limb of a simple U-tube manometer containing mercury is open to the atmosphere while the lift limb is connected to a pipe in which a fluid of specific gravity 0.85 is flowing. The centre of the pipe is 14 cm below the level of mercury in the right limb.Evaluate the pressure of fluid flowing in the pipe if the difference of mercury level in the two limbs is 22 cm.

A

2.86 N/cm2

B

5.73 N/cm2

C

1.43 N/cm2

D

None of the mentioned

A furnace wall is made of three materials (I, II and III) of equal thickness and having thermal conductivity k₁ k₂ and k₃ respectively. The steady state temperature profile inside each material is shown in the figure. Thermal conductivities of the materials will vary as

A

k1 > k2 > k3

B

k2 > k1 > k3

C

k3 > k1 > k2

D

k3 > k2 > k1

From a 2 m × 1.2m sheet, squares are Cut out from each of the four comers as shown in the figure and then the sides are bent to form an open box. The maximum possible volume (in m³) of the box is

A

0.14

B

0.26

C

0.54

D

0.82