Chemical Engineering Answers

What is the critical speed(RPM) of the ball mill, if the diameter of the ball mill=500 mm and diameter of the ball 80 mm

A) 65

B) 75

C) 45

D) 55

E) 35

What should be the diameter (mm) of set rolls which accepts feed equivalent to spheres of 50 mm in diameter and crush them to spheres having in diameter of 15 mm? Here the co-efficient friction is 0.30

A) 250

B) 500

C) 600

D) 750

E) None of these

Name the chemical used in stokes law experiment ?

∫0^∞e^x³ dx is equal to

A) 1/3Γ(1/3)

B) 1/2Γ(1/3)

C) Γ(1/3)           D) 3Γ(1/3)

The breathing process within the lungs involves

(2) Diffusion of A through non-diffing B (b) Equimolar Counter diffusion

(c) Multicomponent non-equimolar counter diffusion (d) Not related to diffusion phenomenon.

∫0^∞ e^x³ dx is equal to

A) 1/3Γ(1/3)

B) 1/2Γ(1/3)

C) Γ(1/3) D) 3Γ(1/3)

The integral factor of (x²y)dx- (x³ + y³)dy = 0 is

A) -y^4

B) -1/y^4

C) y^4 D) 1/y^4

The solution of ye^{x}dx + (2y + e^{x})dy=0, y(0) = -1 is A) y = e^{x}. B) y=e^{-x} C) y = 1 D) y = -1

The particular integral value of (D² + 4)y = sin²x is

A) 1/8-x/8 sin2x

B) 1/8+x/8 Sin2x

C) 1/8-x/8 Cos2x D)1/8+x/8 Cos2x