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All Journal IJEEM - Indonesian Journal of Environmental Education and Management Journal of Training and Community Service Adpertisi JURNAL PARADIGMA: Journal of Sociology Research and Education International Journal of Health Sciences Journal of Innovative and Creativity JTT: Journal Teknik Dan Teknologi
Risa Bernadip Umar
Teknik Mesin, Fakultas Teknik, Universitas Pejuang Republik Indonesia, Indonesia
Humanities Decision Sciences, Operations Research & Management Dentistry Education Engineering Environmental Science Health Professions Languange, Linguistic, Communication & Media Mathematics Medicine & Pharmacology Nursing Public Health Social Sciences Other

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Pengaruh Ukuran Venturi Karburator Terhadap Kinerja Mesin Honda Supra X Muh Fadli; Risa Bernadip Umar; Ramli
Journal Teknik Dan Teknologi  Vol. 2 No. 01 (2025): Desember
Publisher : Fakultas Teknik UPRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.67494/jtt.v2i01.18

Abstract

The use of motorcycles is currently increasing very rapidly. The impact is that fuel consumption is also increasing. Motorcycle technology is increasingly advanced and developing, from 2-stroke engines to 4-stroke engines, from carburetor fuel systems to injection. Motorcycles still use 2-stroke engines and carburetor systems. Inside the carburetor there is a venturi hole/pipe which has a very large effect on engine speed and fuel consumption according to the size of the venturi. From this background, an analysis of the effect of venturi size on fuel consumption can be carried out. The study was conducted with variations in carburetor venturi sizes of 18.3 mm, 18.8 mm and 22.8 mm with an engine speed of 4000 rpm (54 km / h) and premium fuel. Testing was carried out by measuring and recording the time of fuel consumption, then analyzing the standard venturi, enlarging and reducing the venturi diameter. The results of each carburetor venturi diameter on fuel consumption are each 18.3 mm venturi is 8.48 minutes, on the 18.8 mm venturi (standard) is 7.14 minutes and on the 22.8 mm venturi is 6.15 minutes. So that the reduction in the diameter of the carburetor venturi can reduce fuel consumption by 18.77% without reducing vehicle performance.
Pengaruh Variasi Diameter Kawat MetalInertGas(mig) TerhadapKetangguhanDan Struktur Mikro Material Baja ST37 Irvan kirannuan; Risa Bernadip Umar; M.Ilham Nur
Journal Teknik Dan Teknologi  Vol. 2 No. 02 (2026): Juni
Publisher : Fakultas Teknik UPRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.67494/jtt.v2i02.24

Abstract

This study aims to determine the effect of variations in the diameter of the Metal Inert Gas (MIG) welding wire on the toughness and microstructure of ST 37 steel. The research methods used include laboratory experiments with specimen making and toughness testing using the Charpy method, as well as microstructure analysis using an optical microscope. The variations in wire diameter used in this study were 1.2 mm, 0.8 mm, and 0.6 mm, as well as untreated conditions (normal).Research methods include field research using observation methods, namely by making specimens. Library research is intended to process data obtained in the field, obtain knowledge and theoretical basis from several literature and research results of other people with the problem being studied.
ANALISA KORELASI VARIASI HOLDING TIME HEAT POST WELDING TREATMENT SMAW TERHADAP KEKERASAN BAJA ST 42 Eno Noks; Risa Bernadip Umar; Aslim Muda Azis
Journal Teknik Dan Teknologi  Vol. 2 No. 02 (2026): Juni
Publisher : Fakultas Teknik UPRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.67494/jtt.v2i02.34

Abstract

This research aims to analyze the effect of holding time in the Post Weld Heat Treatment (PWHT) process on the mechanical properties of ST42 steel that has undergone welding using the Shielded Metal Arc Welding (SMAW) method. The main focus of the study is the correlation between variations in heat holding time at a certain temperature and changes in hardness and toughness.The method used is an experiment with variations in holding time, followed by rapid cooling to maintain microstructural homogeneity. Hardness testing is conducted using Vickers or Rockwell methods, while toughness is analyzed through bending/impact tests depending on the appropriate method. The microstructure is examined to check for changes in the fractions of ferrite and pearlite, as well as grain size influenced by heat retention.In conclusion, the holding time during PWHT has a significant effect on the hardness and toughness of ST-42 steel. Adjusting the duration of the heat hold can be used as a control variable to optimize the mechanical properties of the weld, balancing strength and crack resistance according to the needs of engineering applications.
Co-Authors A, Adhyatma Alhabsy, Gina Audina Andi Nursinah ARDIANSYAH ARDIANSYAH Aripa, Lusyana Aslim Muda Azis Betan, Abu Bakar Bunga, Ruth Bunga Claartje, Masrikat Maya Diana Dunggio, Abdul Rivai Saleh Eno Noks Hartono Hartono Hoda, Ferdinandus Suban Husain, Fahrisal Idhan, Muhammad Arif Indri Erwhani Irvan kirannuan Lewar, Emanuel Suban Bala M.Ilham Nur Mahoklory, Serly Sani Muh Fadli Muslimin B Muslimin B Muslimin B, Muslimin B Nonis Nonis Nursinah, Andi Nursinah, Nursinah Oktria Veni Rafiuddin, Rafiuddin Ramli Ramli Romi Mesra Ruagadi, Henry A. Sahalessy, Yona C. Siti Nuryani, Siti Suharto Suharto Tahir G, Muhammad Titin Kuntum Mandalawati Tri Wahyuni Utomo, Andri Wahyu Yakobus, I Ketut Zuriani Rizki