आधारभूत विद्युत् (Basic Electrical) – Basic Electrical Engineering MCQ

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

421. On the continuity setting of a multimeter, a beep or a reading near zero ohms across a length of wire indicates that:

     कthe wire is broken खthe wire is continuous (unbroken) गthe wire is live घthe insulation is good
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

422. When the insulation between two conductors is tested with a megger, a reading close to 'infinity' indicates:

     कa short circuit between the conductors खgood, healthy insulation गa faulty megger घa broken (open) conductor
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

423. The insulation resistance of a cable measured with a megger generally:

     कbecomes zero for a healthy cable खincreases with temperature गdecreases as the temperature and moisture of the insulation increase घis independent of temperature and moisture
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

424. An antistatic wrist strap used when handling electronic components is connected to earth through a resistance of about 1 MΩ so that:

     कstatic charge drains away safely while any current through the wearer is limited खthe component receives a charge गthe strap acts as a fuse घthe wearer is fully insulated from earth
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

425. Main protective (equipotential) bonding connects incoming metal water and gas pipes to the main earthing terminal in order to:

     कreduce the electricity bill खcarry the normal load current गimprove the power factor घkeep all simultaneously accessible metal parts at the same potential during a fault
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

426. In a TT earthing system, the consumer's installation is earthed:

     कthrough the neutral conductor of the supply खthrough a combined neutral-and-earth (PEN) conductor गthrough its own local earth electrode, independent of the supply earth घnot at all
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

427. A three-phase supply taken from a delta-connected winding:

     कhas a line current equal to the phase current खalways provides 230 V as well as 400 V गhas a line voltage √3 times the phase voltage घhas no star point, so no neutral conductor can be taken from it directly
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

428. A pure inductor connected to an AC supply:

     कstores energy during one quarter-cycle and returns it to the source in the next खtakes energy only during positive half-cycles गconverts all the energy it receives into heat घstores energy permanently
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

429. In a purely resistive AC circuit, the instantaneous power taken by the resistor:

     कis negative for half of each cycle खis never negative and pulsates at twice the supply frequency गaverages to zero over a cycle घis constant
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

430. A clamp meter is clamped around a two-core cable, enclosing both the live and the neutral conductor of a healthy single-phase load drawing 10 A. It reads about:

     क20 A ख0 A ग14.1 A घ10 A
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।