The objectives of this research are to know: 1) Average learning outcomes of control class students; 2) Average learning outcomes of experimental class students; 3) The average difference between the students' control and experimental class learning outcomes. Experimental research method, with nonequivalent control group design. Sampling using purposive sampling amounted to 50 students. Techniques and data collection tools using measurement techniques in the form of test results learning. Data analysis using descriptive and inferential analysis. The results showed: 1) Average learning outcomes of control class students 72.93 good category. 2) Average learning outcomes of students of the experimental class of 79.87 categories is very good. 3) The difference of the average of control class learning outcomes with the experimental class using the t-test statistical test is Separated Variance obtained tcount = 5.932 and ttable = 2.064 with a significant level of 0.05. Then it can be concluded that there is difference of mean of result of learning of student of control class with experiment class.

This study aims to determine the effect of induction heating on tensile test specimens' clamping products through the medium carbon steel materials' engineering technique from heating using induction heating to heat the medium carbon steel. The research method used observation, interviews, literature study, design of sample materials, experiments, and sampling of experimental data carried out on 30x60x5 mm medium carbon steel specimens using induction heating media, with variations in holding time of 30 and 60 seconds, and temperatures of 800 and 850 °C then proceed with the cooling process with water and oil. The test results were analyzed using the method of analysis of variance based on the experimental design type two factorial levels with a two-factor interaction design model and two responses. The analysis results showed that the combined value of the induction heating effect factor of each test response to the test specimen, that is, water media quenching; holding time; 19.298%, temperature; 29.824%, and the interaction of holding time with temperature; 1.754%. Oil media quenching; holding time; 14.893%, temperature; 30.851%, and the interaction of holding time with temperature; 7.446%.

Nodular Cast Iron have ductile properties when added with elements of magnesium or cerium and this will cause the ductility range of 10-20% increase, hardness and low tensile strength, easy to be formed compared to alloy steel (alloy steel) or high carbon steel (high carbon steel) and the price is relatively cheap, making this material widely used as a basic material (raw material) for the manufacture of a product. To get hard properties on the surface, this material can be carried out a surface hardness process, so that the product can be functioned according to its application. Way that can be done to increase surface hardness as well as low carbon steel strength is by adding carbon elements to the steel which is commonly known as carburizing. The carburizing process is carried out on a muffle furnace specifically heat treatment that is easy to operate in setting the heating temperature, heating speed and holding time. In this research, it is designed and carried out on low carbon steel using carburization media with a ratio of 70% activated carbon and 30%, calcium carbonate (CaCO3) at 900°C heating temperature, holding time variations of 2, 3 and 4 hours respectively, then proceed with the process cooling or double quenching. The results of this study are expected to obtain a product made with cast iron nodular material, so it can the economic value of the product.

As it is known that the boiler is a device used to heat water. This research is conducted to propose another alternative in energy saving efforts by utilizing exhaust gas energy from Diesel motors which so far have not received much attention. The exhaust gases is reused to react the boiler. The method used in design this tool uses the literature study method. The data is taken from the exhaust gas of a 9 x 12 x 4 cylinders Diesel engine with a speed of 300 rpm and Mep 80 Psi, engine power (N) 92.4 Hp. From the results of this study, the results show that the size of the steam pipe with pipe outer diameter (OD) is 1 in, spaced 1 in, the number of rows is 2 rows, the number of pipes in one row Z = 12 rows, with carbon steel pipe material SA 106 Grade. Meanwhile, the size and arrangement of the economizer pipes are the outer diameter of the pipe (OD) 1 in, the spacing = 2 in, the number of rows = 6 rows, the total number of pipes Z = 2 x 6 = 12 pieces, the overall length of the pipe is L x 12, the economizer pipe = 644 in, and SA 106 Grade carbon steel pipe material. The thickness of the boiler drum t = 0.245 cm, capacity Q = 536.75 lb/hour, and the boiler drum material is SA 302 Grade B carbon steel.