WorksheetsTOPIC 2
Total questions: 13
Worksheet time: 9mins
Antara berikut, yang manakah digunakan untuk memutuskan aliran arus secara automatik semasa berlaku kerosakan?
Which of the following is used to automatically interrupt the flow of current during a fault condition?
Fuse
Relay
Isolator
Circuit Breaker
Antara berikut, yang manakah terdiri daripada konduktor yang mudah cair dan memutuskan litar apabila arus melebihi nilai yang ditetapkan?
Which of the following consists of a conductor that melts easily and breaks the circuit when current exceeds the predetermined value?
Fuse
Relay
Transformer
Circuit Breaker
Peralatan manakah digunakan untuk menurunkan arus dan voltan sistem bagi tujuan pengukuran dan perlindungan?
Which equipment is used for stepping down currents and voltages of the system for metering and protection purpose?
Fuse
Relay
Transformer
Circuit Breaker
Mengapa arus masih mengalir walaupun sesentuh pemutus litar telah terpisah secara fizikal?
Why does current continue to flow even when the circuit breaker contacts are physically separated?
Due to magnetic induction
Due to mechanical pressure
Due to stored charge in the circuit
Due to low resistive ionized path
Dalam Kaedah Rintangan Tinggi bagi menghapuskan arka, bagaimana rintangan arka ditingkatkan?
In the High Resistance Method of eliminating arc, how is the resistance of the arc increased?
By keeping the arc resistance low until current zero
By reducing the insulating material resistance
By lengthening, cooling, and splitting the arc
By increasing the voltage across contacts
Apakah yang berlaku pada pemutus litar apabila kerosakan berlaku dalam sistem?
What happens in circuit breaker when a fault occurs in the system?
The trip coil energizes and moving contacts are pulled apart
The auxiliary contacts remain closed permanently
The relay disconnects the tripping battery
Fixed contacts melt and break the circuit
Komponen manakah yang bertanggungjawab untuk perlindungan beban lampau dalam MCB?
Which component is responsible for overload protection in an MCB?
Electromagnetic coil
Bi-metallic strip
Trip coil
Relay
Apakah fungsi utama MCCB dalam sistem elektrik?
What is the main function of MCCB in an electrical system?
To protect circuit from overcurrent and short circuit
To generate electrical power
To control load voltage
To convert DC to AC
Julat arus yang boleh dilindungi oleh MCCB adalah:
The current range that MCCB can protect is:
1 Amp – 10 Amps
16 Amps – 1000 Amps
100 Amps – 5000 Amps
10,000 Amps – 20,000 Amps
Bagaimanakah ACB memadamkan arka selepas litar diputuskan?
How does an ACB extinguish the arc after the circuit is broken?
By using SF6 gas
By using insulating oil
By converting the arc into heat
By using compressed air or a sealed chamber
Di manakah sesentuh (contacts) pemutus litar dipisahkan dalam OCB?
Where are the breaker contacts separated in an OCB?
In SF6 gas
In insulating oil
In a vacuum chamber
In compressed air chamber
Dalam VCB, di manakah sesentuh tetap dan bergerak ditempatkan?
In a VCB, where are the fixed and moving contacts enclosed?
In a permanently sealed vacuum interrupter
In open air chamber
In insulating oil
In SF6 gas
Apakah kelebihan utama gas SF₆ berbanding medium pemadam arka lain?
What is the main advantage of SF₆ gas compared to other arc quenching mediums?
Lower cost
No maintenance required
Easily available in the environment
Superior dielectric and arc quenching properties
