Soal Instalasi Penerangan Listrik Kelas Xii Semester 6

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Soal Instalasi Penerangan Listrik Kelas Xii Semester 6 - Quiz


Questions and Answers
  • 1. 

    Instalasi untuk mengalirkan arus petir yang paling tepat disebut ....

    • A.

      Instalasi penangkal petir

    • B.

      Instalasi penyalur petir

    • C.

      Instalasi pembuang petir

    • D.

      Instalasi penolak petir

    • E.

      Instalasi pelindung petir

    Correct Answer
    B. Instalasi penyalur petir
    Explanation
    Instalasi penyalur petir refers to the installation that directs or channels lightning current. This installation is designed to safely conduct the lightning current from the point of strike to the ground, reducing the risk of damage or harm caused by lightning strikes.

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  • 2. 

    Gambar dibawah ini merupakan gambar cara pemasangan elektrode berbentuk ........

    • A.

      Batang

    • B.

      Pita

    • C.

      Tabung

    • D.

      Pelat

    • E.

      Pilin

    Correct Answer
    B. Pita
    Explanation
    The correct answer is "Pita." The image below shows the installation of electrodes in the form of a strip.

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  • 3. 

    Peralatan berikut perlu adanya pentanahan titik netral, kecuali …..

    • A.

      Alternator pembangkit listrik,

    • B.

      Transformator daya pada gardu-gardu induk

    • C.

      Gardu-gardu distribusi/Panel

    • D.

      Generator pembangkit

    • E.

      Motor 3 fasa

    Correct Answer
    E. Motor 3 fasa
    Explanation
    The motor 3 fasa does not require neutral grounding because it is a three-phase motor. Three-phase motors are designed to operate without a neutral connection and do not require grounding for their proper functioning. On the other hand, alternators, power transformers, distribution panels, and generators typically require neutral grounding to ensure safety and proper operation.

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  • 4. 

    Berikut adalah skema pentanahan, kecuali……

    • A.

      TT (Terra Terra)

    • B.

      IT (Impedance Terra)

    • C.

      TN – C- Terra

    • D.

      TN – C – Separated

    • E.

      TN – C - Combinated

    Correct Answer
    C. TN – C- Terra
    Explanation
    The given options are different types of grounding schemes. The correct answer, TN - C - Terra, is not a valid grounding scheme. TN-C (Terra Neutral - Combined) is a type of grounding scheme where the neutral and protective earth are combined at the source of supply. However, adding "Terra" to TN-C is not a recognized or standard grounding scheme.

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  • 5. 

    Elektrode yang pada umumnya di tanam dangkal merupakan elekrode berbentuk ....

    • A.

      Batang

    • B.

      Pita

    • C.

      Tabung

    • D.

      Pelat

    • E.

      Pilin

    Correct Answer
    B. Pita
    Explanation
    The correct answer is "Pita" because it is stated in the question that the electrode is typically shallowly implanted, and a strip-shaped electrode (pita) would be more suitable for this purpose compared to other shapes like a rod, tube, plate, or coil.

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  • 6. 

    Dibawah ini merupakan bahaya atau tidaknya sentuh langsung & sentuh tidak langsung pada instalasi listrik yang beraliran arus, kecuali….

    • A.

      Tegangan

    • B.

      Arus

    • C.

      Tempat

    • D.

      Waktu

    • E.

      Kondisi badan manusianya

    Correct Answer
    C. Tempat
    Explanation
    The given options are all factors that can determine whether direct or indirect contact with electrical installations is dangerous or not. However, the only option that does not determine the danger level is "Tempat" which means "Place" in English. The danger level of direct or indirect contact with electrical installations is determined by factors such as voltage, current, time, and the condition of the human body. The place where the contact occurs does not affect the danger level.

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  • 7. 

    Elektrode yang terbuat dari pipa besi, baja profil merupakan elektrode .......

    • A.

      Batang

    • B.

      Pita

    • C.

      Tabung

    • D.

      Pelat

    • E.

      Pilin

    Correct Answer
    A. Batang
    Explanation
    The correct answer is "Batang" because the question states that the electrode is made of iron pipe and steel profile. "Batang" in English means "rod" or "bar", which is a long, slender piece of metal. Therefore, it is reasonable to assume that the electrode is in the form of a rod or bar.

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  • 8. 

    Pernyataan dibawah ini bisa menjadi penyebab  terjadinya kebakaran karena listrik kecuali….. 

    • A.

      Sambungan tidak sempurna

    • B.

      Pembebanan lebih dan Kebocoran isolasi

    • C.

      Perlengkapan tidak standar

    • D.

      Pembatas arus tidak sesuai

    • E.

      Sambungan lepas

    Correct Answer
    E. Sambungan lepas
    Explanation
    A loose connection can cause overheating and arcing, which can lead to a fire.

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  • 9. 

    Sistem pengamanan terhadap perangkat-perangkat yang mempergunakan listrik sebagai sumber tenaga, dari lonjakan listrik atau arus bocor adalah…..

    • A.

      Sistem pengaman

    • B.

      Sistem penangkal petir

    • C.

      Pengaman arus bocor

    • D.

      Pengaman lebih

    • E.

      Sistem pentanahan

    Correct Answer
    E. Sistem pentanahan
    Explanation
    The correct answer is "Sistem pentanahan" because it refers to the grounding system that protects electrical devices from electrical surges or leakage current. Grounding helps to divert excess electricity safely into the ground, preventing damage to the devices and reducing the risk of electrical shock or fire hazards.

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  • 10. 

    Gambar dibawah ini merupakan gambar elektrode .....

    • A.

      Batang

    • B.

      Pita

    • C.

      Tabung

    • D.

      Pelat

    • E.

      Pilin

    Correct Answer
    A. Batang
    Explanation
    The correct answer is "Batang". The given image represents an electrode in the shape of a rod or a cylindrical shape. This can be inferred from the options provided, where "Batang" is the only option that matches the description of a rod-like shape. Other options like "Pita" (strip), "Tabung" (tube), "Pelat" (plate), and "Pilin" (coil) do not accurately represent the shape of the electrode in the image.

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  • 11. 

    Berikut adalah bagian-bagian yang harus di tanahkan, kecuali…..

    • A.

      Semua bagian instalasi yang terbuat dari logam

    • B.

      Bagian pembuangan muatan listrik

    • C.

      Semua peralatan rumah tangga yang terbuat dari besi.

    • D.

      Kawat petir yang ada pada bagian atas saluran transmisi

    • E.

      Titik netral dari transformator atau titik netral dari generator.

    Correct Answer
    C. Semua peralatan rumah tangga yang terbuat dari besi.
    Explanation
    The given answer is "Semua peralatan rumah tangga yang terbuat dari besi" (All household appliances made of iron) should not be grounded. This is because household appliances made of iron are not typically conductive materials that can carry electrical charges or pose a risk of electric shock. Grounding is necessary for parts made of metal, discharge of electrical charges, lightning rods, and the neutral point of transformers or generators.

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  • 12. 

    Berikut ini adalah tujuan dari sistem pentanahan, kecuali….

    • A.

      Menjamin keselamatan orang dari sengatan listrik baik dalam keadaan normal atau tidak dari tegangan sentuh dan tegangan langkah;

    • B.

      Menjamin kerja peralatan listrik/elektronik;

    • C.

      Mencegah terjadinya petir;

    • D.

      Mencegah kerusakan peralatan listrik/elektronik;

    • E.

      Menyalurkan energi serangan petir ke tanah;

    Correct Answer
    C. Mencegah terjadinya petir;
    Explanation
    The purpose of a grounding system is to ensure the safety of people from electric shocks, protect electrical equipment, and provide a path for lightning strikes to dissipate energy into the ground. However, preventing lightning strikes is not one of the objectives of a grounding system.

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  • 13. 

    Gambar dibawah ini berfungsi untuk…… 

    • A.

      Penyambungan kawat pentanahan dengan Arde

    • B.

      Penyambungan kawat pentanahan dengan splitzen

    • C.

      Penyambungan Arde dengan Arde

    • D.

      Penyambungan kawat-kawat pentanahan

    • E.

      Penguat Arde

    Correct Answer
    A. Penyambungan kawat pentanahan dengan Arde
    Explanation
    The image below is used for connecting the grounding wire with the Arde.

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  • 14. 

    Rumus dibawah ini digunakan untuk mencari tahanan pentanahan……

    • A.

      Berbentuk pita

    • B.

      Batang ganda

    • C.

      Batang tunggal

    • D.

      Berbentuk plat

    • E.

      Berbentuk plat ganda

    Correct Answer
    C. Batang tunggal
    Explanation
    The given answer "batang tunggal" is the correct answer because the question is asking for the formula used to find the grounding resistance. Among the options provided, "batang tunggal" is the only one that represents a single rod, which is commonly used for grounding systems. The other options such as "berbentuk pita" (strip), "batang ganda" (double rod), "berbentuk plat" (plate), and "berbentuk plat ganda" (double plate) do not represent a single rod and are not commonly used for grounding resistance calculations.

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  • 15. 

    Splitzen pada instalasi penyalur petir berfungsi untuk …….

    • A.

      Arester

    • B.

      Menyalurkan petir

    • C.

      Menyalurkan arus listrik akibat petir

    • D.

      Pengaman petir

    • E.

      Penangkap petir.

    Correct Answer
    E. Penangkap petir.
    Explanation
    Splitzen pada instalasi penyalur petir berfungsi sebagai penangkap petir. Splitzen adalah komponen yang dirancang untuk menarik petir dan mengalirkannya ke tanah dengan aman. Fungsi utama splitzen adalah untuk melindungi bangunan dan sistem listrik dari kerusakan yang disebabkan oleh petir. Splitzen bekerja dengan menangkap muatan listrik yang ada di awan petir dan mengalirkannya melalui kabel grounding ke tanah, sehingga mencegah arus petir masuk ke dalam bangunan dan merusaknya.

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  • 16. 

    Faktor-faktor yang mempengaruhi  Tahanan jenis tanah adalah, kecuali ....

    • A.

      Temperatur

    • B.

      Karakteristik Material Tanah

    • C.

      Kelembaban Tanah

    • D.

      Posisi tanah

    Correct Answer
    D. Posisi tanah
    Explanation
    The factors that affect the specific resistance of soil are temperature, characteristics of the soil material, moisture content, and soil position. Soil position refers to the location or placement of the soil, such as whether it is on a slope or flat ground. The position of the soil does not directly influence its specific resistance, unlike the other factors mentioned.

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  • 17. 

    Berikut adalah bagian-bagian yang harus di tanahkan, kecuali…..

    • A.

      Semua bagian instalasi yang terbuat dari logam

    • B.

      Bagian pembuangan muatan listrik

    • C.

      Semua peralatan rumah tangga yang terbuat dari besi.

    • D.

      Kawat petir yang ada pada bagian atas saluran transmisi

    • E.

      Titik netral dari transformator atau titik netral dari generator.

    Correct Answer
    B. Bagian pembuangan muatan listrik
    Explanation
    The given answer, "Bagian pembuangan muatan listrik" (Discharge of electrical charges), is the only option that does not belong to the list of things that need to be grounded. The other options listed are all examples of items or components that need to be grounded for safety reasons.

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  • 18. 

    Secara teori tahanan dari tanah adalah Nol, tetapi dalam perakteknya hal tersebut tidak terbukti. Ini disebabkan karena …

    • A.

      Alat yang digunakan untuk mengukur bermacam-macam

    • B.

      Pembacaan alat ukur yang tidak cermat

    • C.

      Bahan Pentanahan yang kurang baik

    • D.

      Tempat pengukuran yang tidak tepat

    • E.

      Tahanan kontak antara tanah dengan alat pentanahan

    Correct Answer
    E. Tahanan kontak antara tanah dengan alat pentanahan
    Explanation
    The resistance between the soil and the grounding equipment can affect the measurement of soil resistance. This is because the contact resistance between the soil and the grounding equipment can introduce additional resistance to the overall measurement. Therefore, even though theoretically the resistance of the soil should be zero, in practice, the contact resistance can result in a non-zero measured resistance. This is why the resistance of the soil is not proven to be zero in practice.

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  • 19. 

    Peralatan rumah tangga berikut yang perlu dibuatkan grounding, kecuali ….

    • A.

      Air conditioning

    • B.

      Mesin cuci

    • C.

      Aquarium

    • D.

      Computer

    • E.

      Kulkas

    Correct Answer
    A. Air conditioning
    Explanation
    The other household appliances listed, such as mesin cuci (washing machine), aquarium, computer, and kulkas (refrigerator), need to be grounded for safety reasons. Grounding helps to protect against electrical shocks and prevents damage to the appliances. However, air conditioning does not necessarily need to be grounded as it typically does not pose the same level of risk as the other appliances.

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  • 20. 

    Gambar manakah bahan yang dapat di gunakan untuk membuat pentanahan bentuk anyaman (grounding mesh)

    • A.

      Option 1

    • B.

      Option 2

    • C.

      Option 3

    • D.

      Option 4

    • E.

      Option 5

    Correct Answer
    A. Option 1
    Explanation
    Option 1 is the correct answer because it is the only option that mentions a material that can be used for making a grounding mesh. Without any additional information about the other options, it can be inferred that they do not mention suitable materials for making a grounding mesh.

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