Engineering Answers

 Slider crank mechanism as shown in the figure calculate the i) Acceleration of the slider B ii) Acceleration of the point E iii) Angular acceleration of the link AB OA rotates at (30+X) rad/s in counter clockwise direction (<b><i>10 marks</i></b>) X is the last digit of the student roll no. for example if the student roll no is <b><i>36</i></b> then X=36 and ω=30+36=66 rad/s. Draw the neat and clean diagram with proper scale. Rough drawings will not be considered

Search Results

Slider crank mechanism as shown in the figure calculate the

i) Acceleration of the slider B

ii) Acceleration of the point E

iii) Angular acceleration of the link AB

OA rotates at (30+X) rad/s in counter clockwise direction

In an air compressor the compression takes place at constant internal energy and 50kJ of heat is rejected to the cooling water for every kilogram of air . Calculate the work input for the compression stroke per kilogram of air.

An ac circuit consists of a resistance and capacitance connected in series. The result is that

A farm worker is exposed to Trifluralin, a commonly used pesticide, while working in the fields. Calculate the risk of the worker exposed to 0.01mg/m³ who works 8 hours per day, 7 days a week, for 4.0 months a year, and for 25 years. Assume a body weight of 70.0 kg and an inhalation volume of 20m³ per 8 hours. The slope factor for Trifluralin is 8.4 x 10-¹ (mg/kg. day)-1.

In a mass transfer apparatus operating at 1 atm. the individual

mass transfer coefficients have the following values

kx = 22 kmol/ m2

. h (Δx = 1)

ky = 1.07 kmol/ m2

. h (Δy = 1)

The equilibrium compositions of the gaseous and liquid phases are

characterized by Henry’s law:

p = 0.08 x 106

x, mm of Hg

(i) Determine the overall mass transfer coefficients Kx and Ky.

(ii) Determine the ratio of diffusional resistances of the liquid and gaseous

phases.

Hydrochloric acid (A) diffuses through a thin film of water (B)

4 mm thick at 283 K and 1 atm ressure. The concentration of HCl at point 1 on

one boundary of the film is 12 wt % with density of 1060.7 kg/m3

and on the

other boundary, at point 2, is 4 wt % of density1020.15 kg/m3

. The diffusivity

of HCl in water at 293 K and 1.5 atm is 2.5 x 10-9 m

2

/s. Calculate the flux of

HCl considering water to be stagnant.

Ammonia is being absorbed from air-ammonia mixture by

sulphuric acid solution. The concentration of ammonia 2.5 cm from the acid

surface is 40% by volume and concentration at the acid surface is zero. The

total pressure of the system is 400 mm Hg and the temperature is 288 K. The

value of diffusivity is 1.73 X 10-5 m2

/s at 293 K and 1 atm. Calculate the

following:

(i) Rate of absorption of ammonia across 0.045 m2

of acid surface.

(ii) Concentration of ammonia 1.25 cm from the acid surface