आधारभूत विद्युत् (Basic Electrical) – Basic Electrical Engineering MCQ
आधारभूत विद्युत् (Basic Electrical) – इलेक्ट्रिकल र टेलिकम
Basic Electrical Engineering · Technical – Electrical, Mechanical & Telecom · २,२९९ प्रश्न
२,२९९ प्रश्न उपलब्ध। मोड छान्नुहोस्:
आधारभूत विद्युत् (Basic Electrical): प्रश्न र उत्तर
सही लागेको विकल्पमा थिच्नुहोस्। सही भए हरियो, गलत भए रातो देखिन्छ; ३ सेकेन्डपछि सही उत्तर र व्याख्या देखिन्छ।
सही: ० / ०
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Which type of fire extinguisher is suitable for a fire in live electrical equipment?
सही उत्तर: घ) Carbon dioxide (CO2)
CO2 does not conduct electricity and leaves no residue; water and foam can conduct current.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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An RCCB used for protection of people against electric shock commonly has a rated tripping current of:
सही उत्तर: ख) 30 mA
A 30 mA residual current device trips quickly enough to prevent most fatal shocks.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which wiring arrangement allows a staircase light to be switched on or off from both the bottom and the top of the stairs?
सही उत्तर: ग) Two-way switching
Two two-way switches connected by two strap wires allow control from either location.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In domestic wiring, single-pole switches and fuses must always be connected in the:
सही उत्तर: क) phase (live) wire
Switching the live wire ensures the appliance is not live when the switch is off or the fuse blows.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A Miniature Circuit Breaker (MCB) mainly protects a circuit against:
सही उत्तर: घ) overload and short circuit
MCBs use thermal (overload) and magnetic (short circuit) tripping mechanisms.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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According to the IEC colour code for flexible cables, the protective earth conductor is coloured:
सही उत्तर: क) green and yellow
IEC uses brown for live (phase), blue for neutral and green/yellow for protective earth.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which instrument is used to display and observe the waveform of a voltage?
सही उत्तर: क) Cathode ray oscilloscope (CRO)
An oscilloscope plots voltage against time on a screen, showing the shape of the waveform.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The controlling torque in most indicating instruments is provided by:
सही उत्तर: ख) spiral hairsprings
Springs produce a torque proportional to deflection that balances the deflecting torque.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In a PMMC instrument, damping is usually provided by:
सही उत्तर: ग) eddy currents induced in the aluminium former
The coil is wound on an aluminium former; eddy currents in it oppose motion and give damping.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A wattmeter has two coils, called the:
सही उत्तर: ग) current coil and the pressure (potential) coil
The current coil carries load current and the pressure coil is connected across the supply voltage.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
यी अभ्यास प्रश्न हुन्, आधिकारिक प्रश्न होइनन्। पाठ्यक्रम, विज्ञापन र नतिजाका लागि सम्बन्धित निकायको आधिकारिक वेबसाइट हेर्नुहोस्। उत्तरमा गल्ती भेटे प्रश्नमुनिको "टिप्पणी / गल्ती रिपोर्ट" मा लेख्नुहोस्।
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