Soal Latihan Instalasi Motor Listrik
Berisi soal-soal penghantar komponen dan tentang motor listrik
Questions and Answers
- 1.
Penghantar kabel dengan inti tembaga dinyatakan dengan kode huruf
- A.
Y
- B.
F
- C.
N
- D.
H
- E.
Z
Correct Answer
C. NExplanation
The given answer "N" is the correct code for a copper core cable conductor. The other options (Y, F, H, Z) do not represent the code for a copper core conductor.Rate this question:
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- 2.
Jenis kabel berikut ini adalah jenis kabel penghantar yang dapat dipakai diluar permukaan atau didalam permukaan dan dapat ditanam dalam tanah
- A.
NYAF
- B.
NYY
- C.
NYM
- D.
NYA
- E.
BC
Correct Answer
B. NYYExplanation
The correct answer is NYY. NYY is a type of cable that can be used both underground and above ground. It is designed to be buried in the ground and can also be installed in conduit or ducts. NYY cables are commonly used for outdoor applications where they are exposed to moisture, sunlight, and other environmental factors. They are suitable for both residential and industrial installations.Rate this question:
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- 3.
Komponen MCB yang berfungsi mengamanarus beban lebih adalah ---
- A.
Relay
- B.
Overload
- C.
Relay elektromagnetik
- D.
Komponen thermis
- E.
Komponen electrimagnetik
Correct Answer
D. Komponen thermisExplanation
The correct answer is "komponen thermis." The thermis component functions to protect against excessive load by detecting the temperature rise caused by the overload. When the temperature reaches a certain threshold, the thermis component will trip and disconnect the circuit, preventing any further damage or danger.Rate this question:
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- 4.
Kotak kontak yang dipasang khusus untuk digunakan secara tetap bagi peralatan listrik tertentu yang diketahui spesifikasinya disebut
- A.
Kotak kontak biasa
- B.
Kotak kontak portable
- C.
Kotak kontak tiga phase
- D.
Kotak kontak tegangan
- E.
Kotak kontak khusus
Correct Answer
E. Kotak kontak khususExplanation
The correct answer is "kotak kontak khusus". This is because the question states that the contact box is specifically installed for permanent use for certain electrical equipment with known specifications. Therefore, the term "kotak kontak khusus" accurately describes a contact box that is designed and installed for specific and permanent use.Rate this question:
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- 5.
Pipa Instalasi yang terbuat dari besi dan mempunyai kekuatan mekanis yang cukup kuat melindungi penghantar adalah
- A.
Pipa union
- B.
Pipa PVC
- C.
Pipa plexible
- D.
Pipa galvanis
- E.
Pipa pelindung
Correct Answer
A. Pipa unionExplanation
Pipa instalasi yang terbuat dari besi dan memiliki kekuatan mekanis yang cukup kuat untuk melindungi penghantar adalah pipa galvanis. Pipa galvanis terbuat dari besi yang dilapisi dengan lapisan seng, sehingga tahan terhadap korosi dan memiliki kekuatan mekanis yang baik. Pipa ini sering digunakan dalam instalasi air, gas, dan listrik, karena dapat melindungi penghantar dari kerusakan dan keausan. Pipa union, pipa PVC, pipa plexible, dan pipa pelindung tidak memiliki kekuatan mekanis yang cukup untuk melindungi penghantar seperti pipa galvanis.Rate this question:
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- 6.
Dalam pemasangan instalasi outbow agar pemasangan tampak lebih rapi dapat digunakan
- A.
Pipa instalasi
- B.
Kanal
- C.
Kotak sambung
- D.
Pelindung penghantar
- E.
Kabel tease
Correct Answer
B. KanalExplanation
To achieve a neater installation, a channel can be used. A channel is a type of conduit that is used to enclose and protect electrical wires or cables. It helps to organize and hide the wires, making the installation look more tidy and professional. By using a channel, the wires are securely placed inside and can be easily accessed or modified if needed.Rate this question:
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- 7.
Berikut ini adalah prinsip-prinsip pemasangan pemasangan instalasi listrik tenaga kecuali---
- A.
Prinsip dasar instalasi listrik
- B.
Merencanakan gambar untuk listrik tenaga
- C.
Menentukan ukuran penghantar
- D.
Menghitung rugi tegangan
- E.
Menentukan besar nlai nominal pemutus sirkitpada sirkit akhir maupun cabang
Correct Answer
D. Menghitung rugi teganganExplanation
The given answer, "menghitung rugi tegangan" (calculating voltage drop), is the correct answer because it is the only principle that is not related to the installation of electrical power. The other principles mentioned in the question, such as planning the electrical power diagram, determining the conductor size, and determining the nominal value of circuit breakers, are all directly related to the installation of electrical power. Calculating voltage drop, on the other hand, is a principle used to determine the amount of voltage loss in a circuit, which is not directly related to the installation process.Rate this question:
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- 8.
Jika pengoperasian suatu sistem dapat cepat dilakukan dengan mudah pemasangan peralatan sistem dan instalasi dapat dilakukan dengan cepat dan tepat mudah dalam perawatan dan perbaikan sistem serta mudah dalam pengembangan dan perluasan adalah prinsip dasar
- A.
Safty
- B.
Reliabelity
- C.
Infact of environment
- D.
Accessibility
- E.
Availabelity
Correct Answer
D. AccessibilityExplanation
The given statement suggests that the basic principle being described is "accessibility". This means that the system can be operated quickly and easily, the equipment can be installed quickly and accurately, the system is easy to maintain and repair, and it is easy to develop and expand the system. Accessibility in this context refers to the ease of use and availability of the system.Rate this question:
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- 9.
Pada diagram garis tunggal harus menunjukkan hal-hal sebagai berikut kecuali ---
- A.
Data beban terpasang
- B.
Ukuran penghantar
- C.
Jenis penghantar
- D.
Sistem pembumian
- E.
Peralatan yang dapat dipasang
Correct Answer
E. Peralatan yang dapat dipasangExplanation
In a single line diagram, various aspects of an electrical system are represented. These include the connected load data, conductor size, conductor type, grounding system, and the equipment that can be installed. However, the equipment that can be installed is not a requirement for a single line diagram. Therefore, it is the exception among the given options.Rate this question:
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- 10.
Untuk menentukan nilai nominal pemutus sirkit pada sirkit cabang digunakan
- A.
Alat proteksi sirkit akhir terkecil ditambah arus nominal motor terbesar
- B.
Cukup diambil arus nominal sirkit akhir saja
- C.
Proteksi psirkit akhir terbesar dan ditambah arus nominal motor-motor lainnya
- D.
Diambil antara proteksi sirkit akhir terbesar dan terkecil
- E.
Diambil proteksi sirkit akhir terbesar
Correct Answer
C. Proteksi psirkit akhir terbesar dan ditambah arus nominal motor-motor lainnyaExplanation
The correct answer is "proteksi sirkit akhir terbesar dan ditambah arus nominal motor-motor lainnya". This means that to determine the nominal value of the circuit breaker in a branch circuit, the largest protection circuit device should be considered, along with the nominal current of other motors. This ensures that the circuit breaker can handle the maximum load and provide adequate protection for the circuit.Rate this question:
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- 11.
Termal overload berguna untuk ----
- A.
Mengamankan motor dari tegangan lebih
- B.
Mengamankanmotor dari beban lebih
- C.
Mengamankan motor dari arus lebih
- D.
Mengamankan motor dari arus beban lebih
- E.
Mengamankan motor dari tegangan beban lebih
Correct Answer
D. Mengamankan motor dari arus beban lebihExplanation
Thermal overload berguna untuk mengamankan motor dari arus beban lebih. Ketika arus yang melewati motor melebihi batas yang ditentukan, thermal overload akan mendeteksi peningkatan suhu yang terjadi pada motor. Kemudian, thermal overload akan memutuskan aliran listrik ke motor untuk mencegah terjadinya kerusakan pada motor akibat arus beban yang terlalu tinggi. Dengan demikian, thermal overload berperan penting dalam menjaga keamanan dan mencegah kerusakan pada motor.Rate this question:
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- 12.
Pada instalasi motor tiga fasa biasanya dipasang MCB namun tetap dipasang juga overload---
- A.
Karena overload lebih sensitif dari pada MCB untuk arus beban lebih
- B.
Karena MCB lebih paraktis
- C.
Karena MCB lebih mudah dipasang
- D.
Karena MCB dapat dipakai berulang
- E.
Karena MCB lebih peka
Correct Answer
A. Karena overload lebih sensitif dari pada MCB untuk arus beban lebihExplanation
The correct answer is because overload is more sensitive than MCB for higher load currents. This means that the overload protection device will trip faster and provide better protection against excessive currents, ensuring the motor's safety.Rate this question:
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- 13.
Saklar yang dihubungkan langsung dengan sumber tegangan untuk menghidupkan motor listrik adalah
- A.
Saklar utama
- B.
Saklar daya
- C.
Saklar pengontrol
- D.
Saklar pembantu
- E.
Saklar TPDT
Correct Answer
B. Saklar dayaExplanation
The correct answer is "saklar daya". This switch is directly connected to the power source and is used to turn on the electric motor. It is responsible for controlling the flow of electrical current to the motor, allowing it to be powered on or off as needed.Rate this question:
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- 14.
Saklar pengaman motor( SPM ), ada dua macam yaitu tunggal dan ganda, terangkan fungsi SPM tunggal
- A.
Mengamankan instalasi daya dan pengendalinya
- B.
Mengamankan terjadinya arus bocor
- C.
Mengamankan hanya instalasi pengendalinya
- D.
Mengamankan hanya instalasi dayanya
- E.
Mengamankan arus beban lebih
Correct Answer
A. Mengamankan instalasi daya dan pengendalinyaExplanation
The function of a single motor safety switch (SPM) is to secure the power installation and its control. It ensures the safety of both the power supply and the control system, preventing any potential hazards or accidents.Rate this question:
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- 15.
Jika pada Instalasi motor telah dipasang SPM maka tidak perlu lagi pemasangan overload karena prinsip kerjanya sama
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The statement explains that if a motor has been installed with SPM (presumably a type of protection device), then there is no need to install an overload device because they function on the same principle. This suggests that the SPM device already provides the necessary protection against overload, making the statement true.Rate this question:
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- 16.
Berikut adalah golongan kontaktor magnet kecuali----
- A.
Kontaktor magnet utama
- B.
Kontaktor magnet bantu
- C.
Normally open
- D.
Relay kontaktor
- E.
Timer delay relay
Correct Answer
C. Normally openExplanation
The correct answer is "normally open". The other options listed are all types of magnetic contactors, while normally open is not a type of magnetic contactor.Rate this question:
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- 17.
Konstruksi sebuah kontaktor terdiri dari 4 bagian yaitu, kumparan magnet, kontak utama, kontak bantu dan kontak membuka dan menutup
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
The statement is false because a contactor consists of three main parts: the electromagnet coil, the main contacts, and the auxiliary contacts. The electromagnet coil creates a magnetic field that attracts the contacts, allowing the circuit to close. The main contacts carry the current when the circuit is closed, while the auxiliary contacts are used for control and signaling purposes. There is no specific contact called "kontak membuka dan menutup" in a contactor.Rate this question:
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- 18.
Kontaktor magnet bantu tidak mempunyai kontak utama dan semua kontak NO mempunyai kemampuan arus yang sama
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The statement is true because a magnetic contactor does not have a main contact and all normally open (NO) contacts have the same current-carrying capacity. This means that all the NO contacts in a magnetic contactor can handle the same amount of current.Rate this question:
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- 19.
Fungsi kumparan bantu pada motor kapasitor adalah---
- A.
Untuk menjaga stabilitas putaran
- B.
Untuk mengimbangi kerja gulungan utama
- C.
Untuk mempercepat putaran
- D.
Agar motor tak berhenti tiba-tiba
- E.
Untuk membangkitkan arus berbeda phase antara kumparan utama dan bantu
Correct Answer
E. Untuk membangkitkan arus berbeda phase antara kumparan utama dan bantuExplanation
The auxiliary coil in a capacitor motor is used to generate a phase difference between the main and auxiliary coils. This phase difference creates a rotating magnetic field, which helps in starting and running the motor. This rotating magnetic field aids in the motor's torque production and helps maintain stability in the motor's rotation. Therefore, the correct answer is "to generate a phase difference between the main and auxiliary coils."Rate this question:
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- 20.
Ada tiga macam motor kapasitor yaitu, motor kapasitor start, motor kapasitor run, dan motor kapasitor start-run
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The given statement is true. There are three types of capacitor motors: capacitor start, capacitor run, and capacitor start-run motors. These motors use capacitors to improve their starting and running performance. The capacitor start motor uses a capacitor to provide an initial boost to start the motor, while the capacitor run motor uses a capacitor to improve its running efficiency. The capacitor start-run motor combines both features, using capacitors for both starting and running operations.Rate this question:
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- 21.
Jika energi yang diperlukan dalam memindahkan muatan listrik 4 coulomb dari titik A ke B adalah 20 Joule Hitung beda potensial antara titik A dan B ( rumus V = W/Q )
- A.
3 volt
- B.
4 volt
- C.
5 volt
- D.
6 volt
- E.
8 volt
Correct Answer
C. 5 voltExplanation
The formula for calculating potential difference (V) is V = W/Q, where W is the work done and Q is the charge. In this question, the work done (W) is given as 20 Joule and the charge (Q) is given as 4 coulomb. By substituting these values into the formula, we get V = 20/4 = 5 volt. Therefore, the potential difference between point A and B is 5 volt.Rate this question:
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