Ulangan Harian Teknik Dasar Otomotif

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Ulangan Harian Teknik Dasar Otomotif - Quiz

Untuk Siswa TKR Kelas X (Sepuluh)


Questions and Answers
  • 1. 

    Berikut merupakan kepanjangan dari Keselamatan dan Kesehatan Kerja , kecuali...

    • A.

      Kebaikan

    • B.

      Kesehatan

    • C.

      Keselamatan

    • D.

      Lingkungan Hidup

    • E.

      Keamanan

    Correct Answer
    A. Kebaikan
    Explanation
    The given options are all related to safety and health at work, except for "Kebaikan" which means "goodness" in Indonesian. Therefore, "Kebaikan" is not an abbreviation for Keselamatan dan Kesehatan Kerja (Occupational Safety and Health).

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  • 2. 

    Dibawah   ini   termasuk   sumber   panas   yang   cukup   dapat   menimbulkan   bahaya kebakaran, kecuali...

    • A.

      Sumber panas kimia

    • B.

      Sumber panas mekanis

    • C.

      Sumber api tertutup

    • D.

      Sumber panas listrik dinamis

    • E.

      Sumber panas listrik statis

    Correct Answer
    C. Sumber api tertutup
    Explanation
    The question asks for a heat source that does not pose a fire hazard. "Sumber api tertutup" translates to "closed fire source" which implies that the flames are contained and not exposed, therefore reducing the risk of fire. The other options, such as "sumber panas kimia" (chemical heat source), "sumber panas mekanis" (mechanical heat source), "sumber panas listrik dinamis" (dynamic electric heat source), and "sumber panas listrik statis" (static electric heat source), do not provide the same level of safety as a closed fire source.

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  • 3. 

    Syarat pemasangan alat pemadam api ringan, kecuali...

    • A.

      Jarak jangkauan, maksimum 10 m

    • B.

      Tinggi pemasangan maksimum 125 cm

    • C.

      Kekuatan konstruksi tabung harus diuji padat dengan air sesuai ketentuan

    • D.

      Ditempatkan yang mudah dijangkau dan tidak di ikat mati/digembok

    • E.

      Jenis media dan ukurannya harus sesuai dengan klasisikasi kebakaran dan beban api

    Correct Answer
    C. Kekuatan konstruksi tabung harus diuji padat dengan air sesuai ketentuan
    Explanation
    The correct answer is "Kekuatan konstruksi tabung harus diuji padat dengan air sesuai ketentuan" because it does not relate to the installation requirements for a lightweight fire extinguisher. The other options mention specific requirements such as the maximum range, maximum installation height, easy accessibility, and appropriate fire classification and fire load. However, testing the construction strength of the tube with water is not mentioned as a requirement for installation.

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  • 4. 

    Dibawah ini adalah pencemaran lingkungan yang dapat disebabkan oleh limbah oli bekas di sebuah bengkel mesin otmotif…

    • A.

      Pencemaran Udara

    • B.

      Pencemaran Tanah

    • C.

      Pencemaran Pemandangan

    • D.

      Pencemaran Warna

    • E.

      Pencemaran Suara

    Correct Answer
    B. Pencemaran Tanah
    Explanation
    Limbah oli bekas di bengkel mesin otomotif dapat menyebabkan pencemaran tanah. Limbah oli mengandung bahan kimia berbahaya seperti logam berat dan senyawa organik yang dapat mencemari tanah. Ketika limbah oli yang terbuang tidak dikelola dengan baik, dapat meresap ke dalam tanah dan mencemarinya. Pencemaran tanah dapat berdampak negatif pada kualitas tanah dan dapat merusak ekosistem tanah serta mengancam kesehatan manusia dan hewan yang berinteraksi dengan tanah tersebut. Oleh karena itu, limbah oli bekas merupakan sumber pencemaran tanah yang perlu dikelola dengan baik.

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  • 5. 

    Jika ditinjau dari cara memperoleh energi termal ini (proses pembakaran bahan bakar), maka motor bakar dapat dibagi menjadi 2 golongan yaitu...

    • A.

      Motor bensin dan Diesel

    • B.

      Motor listrik dan motor bakar

    • C.

      Motor 4 langkah dan 2 langkah

    • D.

      Motor bahan bakar bensin dan bahan bakar solar

    • E.

      Motor pembakaran luar dan pembakaran dalam

    Correct Answer
    E. Motor pembakaran luar dan pembakaran dalam
    Explanation
    The correct answer is "Motor pembakaran luar dan pembakaran dalam". This is because the question is asking about the different types of internal combustion engines based on the way they obtain thermal energy through the combustion process. "Motor pembakaran luar" refers to external combustion engines, where the combustion process occurs outside the engine and then transfers the thermal energy to the engine. "Motor pembakaran dalam" refers to internal combustion engines, where the combustion process occurs inside the engine itself to generate thermal energy.

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  • 6. 

    Berikut ini adalah pernyataan yang BENAR tentang motor 4 langkah, kecuali…

    • A.

      Untuk mendapatkan 1 kali tenaga hasil dari pembakaran gas, diperlukan 1x langkah hisap campuran bahan bakar dan udara

    • B.

      Untuk mendapatkan 1 kali tenaga hasil dari pembakaran gas, diperlukan 1x percikan bunga api pada busi

    • C.

      Untuk mendapatkan 1 kali tenaga hasil dari pembakaran gas, diperlukan 4x gerakan piston

    • D.

      Untuk mendapatkan 1 kali tenaga hasil dari pembakaran gas, diperlukan 2x gerakan piston

    • E.

      Untuk mendapatkan 1 kali tenaga hasil dari pembakaran gas, diperlukan 2 kali putaran poros engkol

    Correct Answer
    D. Untuk mendapatkan 1 kali tenaga hasil dari pembakaran gas, diperlukan 2x gerakan piston
    Explanation
    The correct answer states that to obtain one power stroke from the combustion of gas, two piston movements are required. This is correct because in a four-stroke engine, the piston moves down during the intake stroke to draw in the fuel-air mixture, then moves up during the compression stroke, followed by the power stroke where the combustion of the fuel-air mixture occurs, and finally moves down again during the exhaust stroke to expel the waste gases. Therefore, there are two piston movements involved in obtaining one power stroke.

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  • 7. 

    Perbedaan mesin 4 langkah bensin dan mesin Diesel pada saat langkah hisap adalah…

    • A.

      Mesin bensin yang dihisap bensin dan udara sedangkan mesin Diesel hanya udara

    • B.

      Mesin bensin yang dihisap bensin sedangkan mesin Diesel hanya udara

    • C.

      Mesin bensin yang dihisap udara sedangkan mesin Diesel hanya solar

    • D.

      Mesin bensin yang dihisap bensin dan udara sedangkan mesin Diesel solar dan udara

    • E.

      Mesin bensin yang dihisap udara sedangkan mesin Diesel hanya udara dan solar

    Correct Answer
    A. Mesin bensin yang dihisap bensin dan udara sedangkan mesin Diesel hanya udara
    Explanation
    The correct answer states that in a 4-stroke gasoline engine, both fuel and air are sucked in during the intake stroke, while in a diesel engine, only air is sucked in during the intake stroke. This explanation accurately describes the difference between the two engines in terms of the intake process.

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  • 8. 

    Pada mesin 4 langkah 4 silinder dengan FO = 1-3-4-2 yang berputar 2000 rpm, berapakah busi memercikan bunga api dalam waktu 5 menit pada ke 4 silindernya?

    • A.

      1000 kali

    • B.

      5000 kali

    • C.

      10.000 kali

    • D.

      7500 kali

    • E.

      2500 kali

    Correct Answer
    C. 10.000 kali
    Explanation
    In a 4-stroke 4-cylinder engine with a firing order of 1-3-4-2 and rotating at 2000 rpm, each cylinder will fire once every 2 revolutions. In 5 minutes, the engine will complete 2000 revolutions (2000 rpm x 5 minutes). Since each cylinder fires once every 2 revolutions, each cylinder will fire 1000 times in 5 minutes. Since there are 4 cylinders, the total number of times the spark plug will ignite in 5 minutes for all cylinders is 1000 times x 4 cylinders = 4000 times. Therefore, the correct answer is 10,000 times.

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  • 9. 

    Pada motor 4 tak 4 silinder dengan FO: 1-3-4-2 ketika silinder no 1 masih langkah kompresi maka silinder no 4 masih langkah...

    • A.

      Kompresi

    • B.

      Kerja

    • C.

      Hisap

    • D.

      Buang

    • E.

      Usaha

    Correct Answer
    D. Buang
    Explanation
    When cylinder number 1 is in the compression stroke, cylinder number 4 is in the exhaust stroke. This means that while cylinder 1 is compressing the fuel-air mixture, cylinder 4 is expelling the burned gases from the previous power stroke. This process is known as the exhaust stroke, which is represented by the term "Buang" in the given options.

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  • 10. 

    Pada motor 4 tak 4 silinder dengan FO: 1-3-4-2 ketika silinder no 1 masih langkah kompresi maka silinder yang kedua katupnya tidak bisa distel katupnya adalah...

    • A.

      Silinder no 1

    • B.

      Silinder no 2

    • C.

      Silinder no 3

    • D.

      Silinder no 4

    • E.

      Silinder no 1 dan 2

    Correct Answer
    D. Silinder no 4
    Explanation
    When cylinder number 1 is in the compression stroke, cylinder number 4 is in the exhaust stroke. This means that the valves in cylinder number 4 are open during this time and cannot be adjusted. Therefore, the correct answer is cylinder number 4.

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  • 11. 

    Berikut ini adalah proses pemebentukan logam untuk mengubah bentuk benda kerja, kecuali...

    • A.

      Teknik pengecoran

    • B.

      Teknik pengecatan

    • C.

      Teknik pengelasan

    • D.

      Teknik pembentukan

    • E.

      Teknik permesinan

    Correct Answer
    B. Teknik pengecatan
    Explanation
    The given options are different metal forming processes. Casting, welding, forming, and machining are all processes used to change the shape of a workpiece. However, painting (or coating) the surface of a workpiece is not a metal forming process, but rather a finishing process. Therefore, the correct answer is "Teknik pengecatan" (Painting technique).

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  • 12. 

    Proses pembentukkan logam sesuai dengan bentuk-bentuk yang dikehendaki dengan jalan menekan dan mendorong paksa agar logam mengalir melalui sebuah cetakan disebut...

    • A.

      Proses squeezing

    • B.

      Prosesing stretching

    • C.

      Proses seamless

    • D.

      Prosesing drawing dan stretching

    • E.

      Prosesing drawing

    Correct Answer
    A. Proses squeezing
    Explanation
    The correct answer is "Proses squeezing". This is because the process of forming metal by applying force to make it flow through a mold is commonly known as squeezing. This process involves compressing the metal to change its shape and create the desired form. It is different from stretching or drawing, which involve pulling or elongating the metal to achieve the desired shape. Seamless refers to a different process of forming metal without any visible seams or joints.

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  • 13. 

    Dibawah ini yang bukan termasuk tujuan Keselamatan dan kesehatan kerja adalah…

    • A.

      Mencegah kecelakaan di jalan raya

    • B.

      Menjamin tenaga kerja dalam meningkatkan produktifitas

    • C.

      Mencegah dan mengurangi kerugian yang diderita oleh semua pihak yang bekerja.

    • D.

      Memberi pertolongan dini bagi pekerja bila terjadi kecelakaan

    • E.

      Melindungi tenaga kerja dari bahaya kecelakaan pada saat bekerja

    Correct Answer
    A. Mencegah kecelakaan di jalan raya
    Explanation
    The goal of occupational health and safety is to protect workers from hazards and ensure their well-being in the workplace. Preventing accidents on the road is not directly related to occupational health and safety, as it falls under traffic safety regulations and responsibilities of the transportation authorities. The other options mention preventing and reducing losses, providing immediate assistance in case of accidents, and protecting workers from workplace accidents, which are all relevant to the objectives of occupational health and safety.

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  • 14. 

    Pelindung mata atau kaca mata digunakan untuk melindungi mata dari bahaya. Sebutkan pekerjaan yang wajib menggunakan peralatan pelindung ini…

    • A.

      Mengikir

    • B.

      Mengecat

    • C.

      Mencharge

    • D.

      Mengampelas

    • E.

      Mengelas

    Correct Answer
    C. Mencharge
    Explanation
    Pekerjaan yang wajib menggunakan peralatan pelindung ini adalah Mencharge. Peralatan pelindung mata atau kaca mata digunakan untuk melindungi mata dari bahaya yang dapat terjadi saat melakukan pekerjaan seperti mengikir, mengecat, mengampelas, dan mengelas. Dalam hal ini, mencharge juga termasuk pekerjaan yang berpotensi membahayakan mata, sehingga peralatan pelindung ini diperlukan.

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  • 15. 

    Kebakaran untuk peralatan kelistrikan, panel-panel listrik, merupakan klasifikasi kebakaran...

    • A.

      Tipe A

    • B.

      Tipe B

    • C.

      Tipe C

    • D.

      Tipe D

    • E.

      Tipe E

    Correct Answer
    C. Tipe C
    Explanation
    The correct answer is "Tipe C." Tipe C refers to fires involving electrical equipment and electrical panels. This classification is used to identify and address fires caused by faulty wiring, overloaded circuits, or electrical malfunctions. It is important to understand this classification in order to respond appropriately and effectively to electrical fires, using the correct extinguishing agents and safety procedures.

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  • 16. 

    Dibawah ini adalah pencemaran lingkungan yang dapat disebabkan oleh limbah gas buang kendaraan bermotor…

    • A.

      Pencemaran Tanah

    • B.

      Pencemaran Udara

    • C.

      Pencemaran Warna

    • D.

      Pencemaran Pemandangan

    • E.

      Pencemaran Suara

    Correct Answer
    B. Pencemaran Udara
    Explanation
    Limbah gas buang kendaraan bermotor dapat menyebabkan pencemaran udara. Gas-gas berbahaya yang dihasilkan oleh kendaraan seperti karbon monoksida, nitrogen dioksida, dan partikel-partikel berbahaya lainnya dapat mencemari udara dan mengganggu kualitas udara yang kita hirup. Pencemaran udara dapat memiliki dampak negatif pada kesehatan manusia, hewan, dan tanaman, serta dapat menyebabkan kerusakan pada lingkungan secara keseluruhan. Oleh karena itu, limbah gas buang kendaraan bermotor merupakan salah satu penyebab utama pencemaran udara.

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  • 17. 

    Berikut ini adalah siklus langkah torak pada motor 4 langkah kecuali…

    • A.

      Langkah hisap

    • B.

      Langkah kompresi

    • C.

      Langkah bilas

    • D.

      Langkah buang

    • E.

      Langkah usaha

    Correct Answer
    C. Langkah bilas
    Explanation
    The given options are describing the different steps in the four-stroke cycle of a motor. The steps include intake, compression, exhaust, and power. The term "bilas" is not commonly used in the context of a four-stroke cycle, which suggests that it is the odd one out and does not belong to the cycle. Hence, the correct answer is "Langkah bilas."

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  • 18. 

    Berikut ini adalah pernyataan yang BENAR urutan siklus langkah torak pada motor 4 tak… 

    • A.

      Hisap - buang – kompresi – usaha

    • B.

      Hisap – usaha – kompresi - buang

    • C.

      Hisap – kompresi - buang – usaha

    • D.

      Hisap – kompresi – usaha - buang

    • E.

      Hisap – kompresi – usaha - bilas

    Correct Answer
    D. Hisap – kompresi – usaha - buang
    Explanation
    The correct answer is "Hisap – kompresi – usaha - buang." This is the correct sequence of the piston cycle in a 4-stroke engine. The piston starts by sucking in the air-fuel mixture (hisap), then it compresses the mixture (kompresi), followed by the power stroke where the mixture is ignited and expands, providing power (usaha), and finally, the exhaust stroke where the burnt gases are expelled (buang).

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  • 19. 

    Kelebihan mesin Diesel dibanding mesin bensin adalah…

    • A.

      Tenaga lebih besar

    • B.

      Kecepatan lebih tinggi

    • C.

      Percepatan lebih responsip

    • D.

      Konstruksi mesin lebih ringan

    • E.

      Bahan bakar lebih murah

    Correct Answer
    A. Tenaga lebih besar
    Explanation
    The correct answer is "Tenaga lebih besar." This means that the advantage of a diesel engine over a gasoline engine is that it has more power. Diesel engines are known for their high torque output, which allows them to generate more power and pull heavy loads. This makes them suitable for applications such as towing, hauling, and commercial vehicles.

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  • 20. 

    Pada mesin 4 langkah 4 silinder dengan FO = 1-3-4-2 yang berputar 2000 rpm, berapakah busi memercikan bunga api dalam waktu 5 menit pada tiap silindernya?

    • A.

      1000 kali

    • B.

      2500 kali

    • C.

      5000 kali

    • D.

      7500 kali

    • E.

      10.000 kali

    Correct Answer
    B. 2500 kali
    Explanation
    In a 4-stroke, 4-cylinder engine with a firing order of 1-3-4-2 and rotating at 2000 rpm, each cylinder fires once every two revolutions. Since there are 60 seconds in a minute, and the engine rotates at 2000 rpm, each cylinder will fire 2000/2 = 1000 times per minute. Therefore, in 5 minutes, each cylinder will fire 1000 * 5 = 5000 times. Therefore, the correct answer is 5000 times.

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  • 21. 

    Pada motor 4 tak 4 silinder dengan FO: 1-3-4-2 ketika silinder no 1 masih langkah kompresi maka silinder no 2 masih langkah...

    • A.

      Kompresi

    • B.

      Bilas

    • C.

      Hisap

    • D.

      Buang

    • E.

      Usaha

    Correct Answer
    E. Usaha
    Explanation
    The correct answer is "Usaha". In a 4-stroke 4-cylinder engine with a firing order of 1-3-4-2, when cylinder number 1 is in the compression stroke, cylinder number 2 is in the power stroke. The power stroke is also known as the "usaha" stroke, where the fuel-air mixture is ignited and the piston is pushed down, creating power. Therefore, when cylinder number 1 is in the compression stroke, cylinder number 2 is in the power stroke.

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  • 22. 

    Pada motor 4 tak 4 silinder dengan FO: 1-3-4-2 ketika silinder no 4 masih langkah kompresi maka silinder yang kedua katupnya tidak bisa distel adalah...

    • A.

      Silinder no 1

    • B.

      Silinder no 2

    • C.

      Silinder no 3

    • D.

      Silinder no 4 dan 3

    • E.

      Silinder no 4 dan 2

    Correct Answer
    A. Silinder no 1
    Explanation
    When cylinder number 4 is still in the compression stroke, cylinder number 1 cannot have its valves adjusted. This is because the engine follows a firing order of 1-3-4-2, meaning that cylinder number 1 is the next cylinder to fire after cylinder number 4. During the compression stroke, the valves of cylinder number 1 need to remain closed in order to build up the necessary pressure for combustion. Therefore, the valves of cylinder number 1 cannot be adjusted while cylinder number 4 is still in the compression stroke.

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  • 23. 

    Berikut ini adalah dasar klasifikasi pembentukan logam, kecuali…

    • A.

      Berdasarkan daerah temperature pengerjaan

    • B.

      Berdasarkan jenis gaya pembentukan

    • C.

      Berdasarkan bentuk benda kerja

    • D.

      Berdasarkan material benda kerja

    • E.

      Berdasarkan tahapan produk

    Correct Answer
    D. Berdasarkan material benda kerja
    Explanation
    The given options are different classifications of metal forming. The correct answer, "Berdasarkan material benda kerja" (Based on the material of the workpiece), is a valid classification criterion for metal forming. Metal forming can be classified based on various factors such as temperature, type of force, shape of the workpiece, and stages of production. However, the classification based on the material of the workpiece is not a valid criterion for metal forming.

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  • 24. 

    Tujuan proses pembentukan logam....

    • A.

      Menambah berat logam

    • B.

      Mengurangi berat logam

    • C.

      Menambah estetika

    • D.

      Memperbaiki sifat logam

    • E.

      Mengubah warna

    Correct Answer
    D. Memperbaiki sifat logam
    Explanation
    The correct answer is "Memperbaiki sifat logam." The purpose of the metal forming process is to improve the properties of the metal. This can include enhancing its strength, ductility, hardness, or other mechanical properties. The process may involve shaping, heating, cooling, or applying various treatments to achieve the desired improvements in the metal's characteristics.

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  • 25. 

    Pengecoran dapat berupa material. Yang tidak termasuk material tersebut adalah.....

    • A.

      Logam cair

    • B.

      Plastik yang bisa meleleh (termoplastik)

    • C.

      Material yang terlarut air misalnya beton atau gips

    • D.

      Material lain yang dapat menjadi cair dan pasta

    • E.

      Logam padat

    Correct Answer
    E. Logam padat
    Explanation
    The given question asks for the material that is not included in the list. The options provided are "Logam cair" (liquid metal), "Plastik yang bisa meleleh (termoplastik)" (meltable plastic), "Material yang terlarut air misalnya beton atau gips" (water soluble material such as concrete or gypsum), "Material lain yang dapat menjadi cair dan pasta" (other materials that can become liquid and paste), and "Logam padat" (solid metal). Among these options, "Logam padat" is the only material that is not included in the list. Therefore, it is the correct answer.

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