Engineering

Question 1 a). The compaction data for a borrow pit material for use a road sub-base has been provided in the table below. Copy and complete the table and plot the compaction curve. From your plot determine the MDD and OMC CIVIL ENGINEERING DEPARTMENT GEOTECHNICAL ENGINEERING LABORATORY COMPACTON SHEET SAMPLE 10:1 DATE: 06-12-2017 Moisture Content() Mans of cylinder + Wet sample Mans of cylinders! Mass of wed sample Bulk Density lech o 5830 4237 1593 2 5952 4237 1715 4 6092 4231 10 6 6152 4237 1915 3 6119 4237 1 10 6000 4237 1803 AB101KY05 SSBBK1M VI 1248322737307.72114.42 121.63 126.51 1487 14842 1202412263 10136107.1 1099 114141 129.97 127.4 2479 25.68 25.97 25.40 25.85 25.38 25.00 23:31 ax2 Toz A61 150.66 156. 159.36172.22 127.06. 132 13128143 25.10 25.30 25.4 253 Container Ne Mans of container wet soil Mass of container dry soil Mass of containeral Mans of weselle Mans of drysolo Mass of waters) water Content) Average Water content Dry Day Height of mould ſom Diameter of mouidem Volume of mould 102 AP|8marks b). As a quality control-quality assurance (QC/QA) personnel on the project you are required to check the adequacy of the compaction performed in the field. The core-cutter method was used at three different points on the compacted soils. The data obtained is as shown in the table below. Determine the field dry density by completing the table below. Position Center Left Right Mass of cylinder 200 200 200 Mass of cylinder + compacted wet soil 1390 1410 1420 Mass of compacted wet sample 1200 1230 1240 Bulk density of compacted sample Mass of empty moisture content container 25.2 23.5 24.6 Mass of moisture content container + wet 100.2 98.1 96.5 sample Mass of moisture content container +dry sample 93.3 90.1 88.9 2 Mass of water Mass of dry sample Moisture content Dry density Average dry density AN[7marks) c). If the specification for the project is to achieve a relative compaction of not less than 85%, indicate whether the field compaction is effective or otherwise. Indicate also other methods you could have used to verify the field compaction. AP[Smakss! Total:[20marks]

EXPERT ANSWER

2 points The formula shown can be used for finding relative rotation of a segment of a tapered shaft. T(X2-X1) = 02-01 GJ O True O False 2 points Bending normal stress varies linearly across the cross section for a non-homogenous material. O True O False 2 points By inspection determine the bending normal stress at A. A B O Tension O Compression 3 3 O Zero The internal shear force jumps by the value of ponte the applied transverse force as one crosses it from left to right. True O False 4 니 2 points The formula shown can be used to find the normal stress on a cross section of a tapered beam. xx -My/I. O True O False 2 points By inspection determine the bending normal stress at B. DIII A B Tension ооо O Compression 6 Zero 2 points Bending normal strain varies linearly across the cross section for a non-homogenous material. O True O False 그 7 2 points The equations shown cannot be used for non-linear materials. jCxxdA = 0 and M. = -[YO.xdA A True 8 к O False 2 points Ductile materials show large elastic deformation but small plastic deformation before fracture. O True O False 7 2 points In the formula shown, y is measured from the bottom of the beam. 0 -M.y/1.. XX O True 10 O False

EXPERT ANSWER 1. True. This formula is valid 2. True. 3. Compression. Because the beam will be sagging, and in sagging top fibre is in compression. 4. True 6. Compression. This is hogging condition. Here bottom fibre is at compression. 7. True 9. True 10. False. y is taken from neutral axis. there is no …

2 points The formula shown can be used for finding relative rotation of a segment of a tapered shaft. T(X2-X1) = 02-01 GJ O True O False 2 points Bending normal stress varies linearly across the cross section for a non-homogenous material. O True O False 2 points By inspection determine the bending normal stress at A. A B O Tension O Compression 3 3 O Zero The internal shear force jumps by the value of ponte the applied transverse force as one crosses it from left to right. True O False 4 니 2 points The formula shown can be used to find the normal stress on a cross section of a tapered beam. xx -My/I. O True O False 2 points By inspection determine the bending normal stress at B. DIII A B Tension ооо O Compression 6 Zero 2 points Bending normal strain varies linearly across the cross section for a non-homogenous material. O True O False 그 7 2 points The equations shown cannot be used for non-linear materials. jCxxdA = 0 and M. = -[YO.xdA A True 8 к O False 2 points Ductile materials show large elastic deformation but small plastic deformation before fracture. O True O False 7 2 points In the formula shown, y is measured from the bottom of the beam. 0 -M.y/1.. XX O True 10 O False Read More »

Question 3 [20] The speed of the engine mechanism shown in Figure 1 is controlled by the Porter governor. All arms of the governor are 20 mm and are hinged at a distance of 4 mm from the axis of rotation. The mass of each ball is 100 g and the mass of the sleeve is 500 g. The governor sleeve begins to rise at 40 rad/s. when the links are at an angle of 5° to the vertical. Assuming the friction force to be constant 3.1. Draw the port governor mechanism and clearly lable it. (06) 3.2. Calculate the minimum speed of rotation (in rad/s) when the inclination of the (14) arms to the vertical is 10°.

EXPERT ANSWER

ACTIVITY 6.1: Player’s records using linked list Redo your work in Laboratory Activity 3 where you will record and compute for the scores of 5 players, this time, using linked lists. The information of each player contains: Nickname, Age and two best played scores. The program will prompt the user to choose the operation of records from a menu as shown below: MENU 1 1. Add record 2. View player’s records 3. Compute for the average 4. Show the player(s) who gets the max average. 5. Show the player(s) who gets the min average. 6. Exit VII. QUESTION AND ANSWER Briefly answer the questions below. Avoid erasures. For group activity, specify the name of GROUP MEMBER/s who answered the question. Do not forget to include the source for all NON-ORIGINAL IDEAS. What are the advantages of using linked lists? What are the disadvantages of linked lists?

C++ Programming Language EXPERT ANSWER #include <iostream>#include <iomanip>using namespace std; //structure of playerstruct player{string nickname;int age;int score1;int score2;float average;player *next;}; //function to print the menuvoid printMenu(){cout<<“========================================”<<endl;cout<<” MENU “<<endl;cout<<“========================================”<<endl;cout<<“1. Add record”<<endl;cout<<“2. View player’s record”<<endl;cout<<“3. Compute for the average”<<endl;cout<<“4. Show the player’s who gets the max average”<<endl;cout<<“5. Show the player’s who gets the min average”<<endl;cout<<“6. Exit”<<endl;} //function …

ACTIVITY 6.1: Player’s records using linked list Redo your work in Laboratory Activity 3 where you will record and compute for the scores of 5 players, this time, using linked lists. The information of each player contains: Nickname, Age and two best played scores. The program will prompt the user to choose the operation of records from a menu as shown below: MENU 1 1. Add record 2. View player’s records 3. Compute for the average 4. Show the player(s) who gets the max average. 5. Show the player(s) who gets the min average. 6. Exit VII. QUESTION AND ANSWER Briefly answer the questions below. Avoid erasures. For group activity, specify the name of GROUP MEMBER/s who answered the question. Do not forget to include the source for all NON-ORIGINAL IDEAS. What are the advantages of using linked lists? What are the disadvantages of linked lists? Read More »