1 Answer

Answer :

H.R.C. fuse, as compared to a rewirable fuse, has no ageing effect, high speed of operation, high rupturing capacity.

Related questions

Description : ln HRC fuse the time between cut-off and final current zero is called

Last Answer : ln HRC fuse the time between cut-off and final current zero is called the arcing time

Description : what is HRC fuse?

Last Answer : HRC (High Rupturing Capacity) fuse HRC fuse is High Rupturing Capacity fuse. At the time of fault it disconnect the circuit very fast. Filling powder is silica sand. No flashover ... speed response Reliable No maintenance CheaperDisadvantages:- We have to replace it manually after each operation.

Last Answer : H.R.C. fuses provide best protection against short-circuits.

Description : A fuse wire should have :  (A) Low specific resistance and high melting point (B) Low specific resistance and low melting point (C) High specific resistance and high melting point (D) High specific resistance and low melting point

Last Answer : A fuse wire should have : High specific resistance and low melting point

Last Answer : A fuse in a motor circuit provides protection against short-circuit and overload.

Last Answer : The fuse blows off by melting.

Last Answer : The fuse rating is expressed in terms of current.

Last Answer : A fuse is connected in series with circuit.

Last Answer : The material used for fuse must have low melting point and high specific resistance.

Last Answer : The main function of a fuse is to prevent excessive currents.

Description : What is the advantage of HRC fuses when compared with rewireable fuses?

Last Answer : Ans.HRC fuses have high rupturing capacity, high speed of operation and no aging effect.

Description : In an AC. circuit, a low value of kVAR compared with kW indicates?

Last Answer : In an AC. circuit, a low value of kVAR compared with kW indicates high power factor.

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Last Answer : An alternator coupled to a hydraulic turbine runs at slow speed, as compared to others.

Last Answer : When a conductor carries more current on the surface as compared to core, it is due to skin effect.

Description : In an alternator at lagging power factor the generated voltage per phase as compared to that at unity power factor?

Last Answer : In an alternator, at lagging power factor the generated voltage per phase as compared to that at unity power factor must be more than terminal voltage.

Description : What is fuse?

Last Answer : Ans. Fuse is used to protect an electric circuit when the rated current exceeds in the circuit the fuse wire melts and opens the circuit.

Description : State any two advantages of MCB over Fuse. State the standard specifications of MCB available in the market.  

Last Answer : Following advantages of MCB over Fuse: 1. No need of replacement of fuse wire. 2. Manually restore of supply is simple. 3. Fault understanding by visual inspection 4. More safe than fuse The standard specifications of ... 6A, 10A,16A,20A, 25A, 30A, 32A, 40A, 50A, 60A and 63A 6. 250V and 450 v

Description : State the material used for making (1) Magnetic Core (2) Fuse element  

Last Answer : The material used for making of:  (1) Magnetic Core : Iron, cobalt, Nickel, CRGO, HRGO , silicon steel  (2) Fuse Element: Tin- lead wire, Tinned copper wire 

Description : Write applications of each of the following:(i) Fuse (ii) MCB (iii) MCCB.

Last Answer : i) Applications of fuse:  * Used in domestic installations to provide short circuit protection.  * Used in commercial / Industrial installations to provide overload and short circuit protection.  * Used in ...  * Rectifiers panels,  * U.P.S, Electronic equipment,  * Motors,  * Furnaces

Description : Give the function of fuse and switch.

Last Answer : Functions of fuse:  * To break the circuit under fault condition.  * To provide overcurrent protection to the circuit.  * To provide short circuit protection to the circuit.  * To provide ...  * To make the electric circuit manually.  * To break the electric circuit manually.

Description : What is a fuse ?

Last Answer :  A Fuse is a protective device which prevent overloading of current in a circuit.

Description : Describe the working of HRC fuse with neat diagram.

Last Answer : Working of HRC Fuse: Under normal conditions, the fuse element is at a temperature below its melting point. Therefore, it carries the normal current without overheating. When a fault ... powder and results in the formation of high resistance substance that helps in quenching the arc. 

Description : Explain construction and characteristics of HRC fuse.

Last Answer : Construction of H.R.C. Fuse: Figure shows the essential parts of a typical H.R.C. fuse. It mainly consist of a heat resisting ceramic body. Both the ends of the cermaic body consists ... particular circuit and for coordination purpose. A typical Fuse characteristic is shown in figure below. 

Description : Describe the difference between fuse and MCCB.

Last Answer : Sr. No Fuse MCCB 1 Fuse melts / fuses in case of excessive load. MCCB trips off in case of excessive load. 2 Fuse needs to be replaced after every ... Generally protects the load against short-circuit. Generally protects the load against different types of faults.

Description :  An H.R.C. fuse is?

Last Answer :  An H.R.C. fuse is a ceramic body having metal and caps.

Description : Compared to Gauss-Seidel method, Newton-Raphson method takes : A. less number of iterations and more time per iteration B. less number of iterations and less time per iteration C, more number of iterations and more time per iteration D. more number of iterations and less time per iteration

Last Answer : Compared to Gauss-Seidel method, Newton-Raphson method takes : A. less number of iterations and more time per iteration B. less number of iterations and less time per iteration ... of iterations and more time per iteration D. more number of iterations and less time per iteration

Description : The specific fuel consumption of a petrol engine compared to diesel engine of same H.P is A. same B.more C. less D. unpredictable

Last Answer : ANSWER : B

Description : Speed of snail as compared to speed of a car will be in units A. cm s-1 B. m s-1 C. km s-1 D. km h-1

Last Answer :  cm s-1

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Last Answer : (B) Higher C/H ratio