Question

Draw the pressure diagram for a wall form 15 feet tall in which concrete will be placed at a rate R = 10 feet per hour when the temperature is 60ºF. Draw the diagram if the wall were only 6 feet tall. [Consider Density of concrete = 150 pcf]

Answer #1

Given the following design conditions for a Wall form system:
Concrete Mix = Type III cement without retarder, Concrete Unit
Weight (w) = 150 pcf Wall height (h) = 10 Feet high, Rate of Pour
(R) = 8 Feet per hour, Concrete Temperature (T) = 80 Degrees
Fahrenheit, Wall Thickness = 12 inches What is the maximum design
pressure on the wall in pounds per square foot (psf)? Please solve
with all steps and calculations included.

Design forms for 13’-8” high wall to be concreted at the rate of
5 ft per hour, internally vibrated. Assume the mix is made with
Type I cement, with no pozzolans or admixtures, and that the
temperature of concrete at placing is 75°F. The unit weight of
concrete is 150 pcf with a slump of 3.75 inches. The forms will be
used only once, so short-term loading stresses will apply.
Use form grade plywood sheathing 7/8 in. thick in 5×10-ft...

A ladder 25 feet long is leaning against the wall of a house.
The base of the ladder is pulled away from the wall at a rate of 2
feet per second.
How fast is the top of the ladder moving down the wall when the
base is 15 feet from the wall?
Consider the triangle formed by the side of the house, the
ladder, and the ground. Find the rate at which the area of the
triangle is changing...

A ladder 25 feet long is leaning against the wall of a house.
The base of the ladder is pulled away from the wall at a rate of 2
feet per second.
(a) What is the velocity of the top of the ladder when the base
is given below?
7 feet away from the wall
ft/sec
15 feet away from the wall
ft/sec
20 feet away from the wall
ft/sec
(b) Consider the triangle formed by the side of the...

A 26 foot ladder is
lowered down a vertical wall at a rate of 3 feet per minute. The
base of the ladder is sliding away from the wall.
At what rate is the ladder sliding away from the wall when the
base of the ladder is 10 feet from the wall?
Would you expect the same rate when
the ladder is any distance from the wall?
Would you expect
your answer to be positive when the base is any...

The Assignment:
Water at a pressure of 15 bar at a temperature of 30°C enters a
boiler, where it is heated to 250°C at constant pressure. Steam
leaving the boiler passes into a throttle which reduces the
pressure to 10 bar. The steam is then passed through a small
turbine, exiting at atmospheric pressure at 110°C. Please draw a
schematic diagram. 1. How much heat is added per kg to the water by
the boiler? 2. Find the temperature of...

In answering this set of nine questions, you are encouraged to
draw a PV diagram, with P (pressure) on the y axis and V (volume)
on the x axis. Plot the three points A, B, and C on this
diagram.
1. Consider 10.0 liters of an ideal (monatomic)
gas at a pressure of 33.0 atm and a temperature of
326 K. Call this state of the system A. Using the
ideal gas law, calculate the number of moles of gas...

Lee Company's standards for the most recent period are given
below. Fixed and variable manufacturing overhead costs are applied
to products on the basis of machine hours. The denominator volume
of machine hours is 9,000.
Standard Quantity
or Hours per unit
Standard Price
or Rate per unit
Standard Cost
per unit
Direct Materials
3 feet
$6 per foot
$18
Direct Labor
1.5 direct labor hours
$10 per direct labor hour
$15
Variable Overhead
2 machine hours
$12 per machine hour...

Gilmore's Company's standards for the most recent period are
given below. Fixed and variable manufacturing overhead costs are
applied to products on the basis of machine hours. The denominator
volume of machine hours is 9,000.
Standard Quantity
or Hours per unit
Standard Price
or Rate per unit
Standard Cost
per unit
Direct Materials
3 feet
$6 per foot
$18
Direct Labor
1.5 direct labor hours
$10 per direct labor hour
$15
Variable Overhead
2 machine hours
$12 per machine hour...

Lee Company's standards for the most recent period are given
below. Fixed and variable manufacturing overhead costs are applied
to products on the basis of machine hours. The denominator volume
of machine hours is 9,000.
Standard Quantity
or Hours per unit
Standard Price
or Rate per unit
Standard Cost
per unit
Direct Materials
3 feet
$6 per foot
$18
Direct Labor
1.5 direct labor hours
$10 per direct labor hour
$15
Variable Overhead
2 machine hours
$12 per machine hour...

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