Engineering Answers

A Manufacturer is interested in starting a business with five different models of tractors ranging from 7.5 KW to 75 KW capacities. Specify power capacities of models

Four bar chain is given with length of links as follow: Link 1 = 74mm, link 2 = 96 mm, link 3 = 60 mm, Link 4 = 70mm. Determine: a) Whether it belong to class 1 or class 2 category of mechanisms. b) Describe all possible inversions with explanations

Gaseous A absorbs and reacts with B in liquid according to

A(g) + B(1) R(I). -TA-KCACB

S. No.

k, m² liquid/mol hr H. Pa m' liquid/mol

HX

in a packed bed under conditions where

1

2

10⁰

10.

10⁰

10⁰

ka=0.1 mol/hr-m² of reactor - Pa

f₁ = 0.01 m³ liquid/m³ reactor

DA P=10 m³/hr

3

10

10³

ka = 100 m² liquid/m² reactor hr

a = 100 m²/m³ reactor

st 4

10

1

5

10-2

1

At a point in the reactor where p = 100 Pa and C₁ = 100 mol/m³ liquid

9

108

(a) calculate the rate of reaction in mol/hr-m¹ of reactor.

(b) describe the following characteristics of the kinetics:

location of the major resistance (gas film, liquid film, main body of liquid)

behavior in the liquid film (pseudo first-order reaction, instantaneous. second-order reaction, physical transport) for the following values of reaction rate and Henry's law constant.

Axes Q2 and Q4 are fixed. Q2A = 1 1/2 inches.,Q4B = 2 inches., Q2Q4=3 inches. AB is out of such a length that when the driving crank 2 is 30 degrees celsius above Q2Q4, the driven crank 4 is 60 degrees celsius below Q2Q4 as shown. Find the length of AB and the two extreme positions of the center line Q4B of crank 4.

Axes Q2 and Q4 are fixed. Q2A = 1 1/2 inches., AB = 3 inches., Q4B= 2 inches., and Q2Q4=3 inches. crank 2 is the driver turning counterclockwise. the proportions are such that, while 2 makes a complete revolution , 4 oscillates through a certain angle. Find the two extreme positions of the center line Q4B of crank 4.

What are the typical deleterious substances in aggregates that affect Portland cement concrete?

Discuss this effects briefly.

What is alkali-silica reactivity? What kinds of problems are caused by ASR? Mention two ways to minimize ASR

Define the fineness modulus of aggregate. What is it used for?

The following laboratory tests are performed on aggregate samples:

a) Specific gravity and absorption

b) Soundness

c) Sieve analysis test

What is the significance and use of each of these tests?

Define the following terms:

a) Saturated Surface-Dry (SSD) conditions of aggregates

b) Absorption of aggregates

c) Free water on aggregates