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It is required to lift a load of 1.2 tons through a height of 320
mm by using a screw jack under the following condition:
• The available material of the screw is plain carbon steel
which has elastic strength in tension and compression of
200 MPa and in shear 120 MPa respectively.
• The available material of the nut is phosphor-bronze for
which the elastic limit may be taken as 100 MPa in
tension, 90 MPa in compression and 80 MPa in shear.
• The bearing pressure between the nut and the screw is
not to exceed 20 N/mm?.
Design and draw the screw jack. The design should include
the design of:
1) The screw,
2) Nut,
3) Handle and Cup, and
4) Body.
Draw to full scale an isometric and multi-views for the screw
jack.
The design report should include the following:
• Calculation sheet.
• Detail drawing (soft).
• References including material data sheets and used
curves and tables.
• Assume any missing data.
_________________ is the ability of the business to satisfy its short-term obligations as they become due.
Select one:
a.
Solvency
b.
Liquidity
c.
Profitability
d.
Currency
A 70kg box is slid along a horizontal floor by a horizontal 400Nt force. Find the distance travelled by the box in 5 seconds if
a) there is no friction
b) coefficient of friction = 0.20
In 100 mL of 6.02 M HCl, which has a gravity of 1.10 g/ml, a strip of magnesium metal with a mass of 1.22 g dissolves. The initial temperature of the hydrochloric acid is 23.0 °C, and the end temperature of the solution is 45.5 °C. Calculate AH for the reaction under the conditions of the experiment. (The heat capacity of the calorimeter is 562 J/°C, specific heat of the finals is 4.184 /gºC.) the reaction is: Mg(s) + HCl(aq) → MgCl2(aq) + H2(g)
7)Write a Python program to count the number of characters (character frequency) in a string. without using functionConsider the following table:
State a java program that use Switch structure to print one of the above statements depending on the
selected day. Write comments to explain your code.
day statement
Monday " Monday is the first day of the week !"
Tuesday " Tuesday is the second day of the week !"
Wednesday "Wednesday is the third day of the week !"
Thursday "Thursday is the fourth day of the week !"
Friday “Friday is the fourth day of the week !"
Saturday “Saturday is the fifth day of the week !"
Sunday “Sunday is the sixth day of the week !"
Any other day “ Unknown day !"
All values in an array must be of the same data type.
A: True
B: False
Observe the following code:
const int SIZE = 3;
int nums[SIZE] = {1, 2, 3};
for (int i = 0; i <= SIZE; i++) {
std::cout << nums[i];
}
What is wrong with this code?
A: You cannot use constants with array definitions
B: The initialization list exceeds the size of the array
C: Should be i = 1 because you need to start with the first array element
D: Should be i < SIZE so that you don't access an array element that doesn't exist
Observe the following code:
int nums[3] = {1, 2, 3};
std::cout << nums;
What will be output to the screen?
A: 1
B: 3
C: 123
D: A memory address
Write a program which requests a number between 1 and 50 from the user. It must repeatedly ask the user for a number until a valid number is entered. After receiving a valid number, the program must display all the even numbers smaller than that number.
#340153 on Dec 2023