The storage batteries are rated in

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The storage batteries are rated in Amp-hrs

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State applications of storage batteries.

Description : State applications of storage batteries.

Last Answer : Applications of storage batteries: 1) Broadcasting stations. 2) Transmission and distribution substations. 3) Telephone and telegraphic services. 4) Emergency lighting for hospitals, shops, banks etc. ... lights 7) Railway signaling system 8) UPS systems 9) Marine and submarine applications 

What are the advantages and disadvantages of LED storage cell and lithium ion batteries ?

Description : What are the advantages and disadvantages of LED storage cell and lithium ion batteries ?

Last Answer : Although both cells are rechargeable, lithium ion batteries have higher recharge efficiency. Due to this its use as an alternative to commercial led storage cell is increasing. Light Li / C anode and ... LiOH and H2, gases that are dangerous. LIB costs more than Ni-Cd rechargeable batteries .

What is an advantage of fuel cells over lead storage batteries?

Description : What is an advantage of fuel cells over lead storage batteries?

Last Answer : Electrical energy is continuously obtained.

Lead Storage batteries commonly contain ____. A. Copper B. Lead C. Iron D. Mercury

Description : Lead Storage batteries commonly contain ____. A. Copper B. Lead C. Iron D. Mercury

Last Answer : ANSWER: B

Storage batteries commonly contain ____. A. Copper B. Lead C. Iron D. Mercury

Description : Storage batteries commonly contain ____. A. Copper B. Lead C. Iron D. Mercury

Last Answer : ANSWER: B

What is used in storage batteries? (1) Copper (2) Tin (3) Lead (4) Zinc

Description : What is used in storage batteries? (1) Copper (2) Tin (3) Lead (4) Zinc

Last Answer : (3) Lead Explanation: The electrodes of the cells in a storage battery consist of lead grids. The openings of the anodic grid is filled with spongy (porous) lead. The openings of the cathodic grid ... ' storage batteries, can store a lot of charge and provide high current for short periods of time.

The metal used in storage batteries- (1) Iron (2) Copper (3) Lead (4) Zinc

Description : The metal used in storage batteries- (1) Iron (2) Copper (3) Lead (4) Zinc

Last Answer : (3) Lead Explanation: Commercially available batteries use a variety of metals and electrolytes. Anodes can be made of zinc, aluminum, lithium, cadmium, iron, metallic lead, lanthanide, or graphite

Which of the following statements describes the effects of ambient temperature on local action within lead-acid storage batteries? A. Increasing ambient temperature increases local action. B. Increasing ambient temperature decreases local action. C. Ambient temperature has no effect on local action. D. At 90°F all local action virtually ceases.

Description : Which of the following statements describes the effects of ambient temperature on local action within lead-acid storage batteries? A. Increasing ambient temperature increases local action. B. Increasing ambient ... has no effect on local action. D. At 90°F all local action virtually ceases.

Last Answer : Answer: A

When used for taking resistance measurements, a volt-ohm-milliammeter is normally powered by _____________. A. a hand cranked generator B. internal storage batteries C. the current in the circuit being tested D. a step down transformer

Description : When used for taking resistance measurements, a volt-ohm-milliammeter is normally powered by _____________. A. a hand cranked generator B. internal storage batteries C. the current in the circuit being tested D. a step down transformer

Last Answer : Answer: B

At high discharge rates, nickel-cadmium storage batteries are superior to lead-acid batteries because they __________. A. require fewer cells for the same voltage and less mounting space B. are able to produce higher voltages and do not have to be charged as often C. can be charged and discharged many times without much damage D. have no individual cells to replace at the end of useful life

Description : At high discharge rates, nickel-cadmium storage batteries are superior to lead-acid batteries because they __________. A. require fewer cells for the same voltage and less mounting space B. are able to ... times without much damage D. have no individual cells to replace at the end of useful life

Last Answer : Answer: C

Under normal conditions, storage batteries used for starting the emergency diesel generator are maintained in a charged state by which of the following methods? A. Trickle charging B. Fast charging C. Equalizing charge D. Reverse charging

Description : Under normal conditions, storage batteries used for starting the emergency diesel generator are maintained in a charged state by which of the following methods? A. Trickle charging B. Fast charging C. Equalizing charge D. Reverse charging

Last Answer : Answer: A

Nickel-cadmium storage batteries are superior to lead-acid batteries because they __________. A. put out higher voltages and require no maintenance B. can remain idle and keep a full charge for a long time C. need fewer cells in series and use less mounting space D. all of the above

Description : Nickel-cadmium storage batteries are superior to lead-acid batteries because they __________. A. put out higher voltages and require no maintenance B. can remain idle and keep a full charge for a long time C. need fewer cells in series and use less mounting space D. all of the above

Last Answer : Answer: B

Common nickel-cadmium and nickel-iron storage batteries utilize _______________. A. acid primary cells B. alkaline primary cells C. acid secondary cells D. alkaline secondary cells

Description : Common nickel-cadmium and nickel-iron storage batteries utilize _______________. A. acid primary cells B. alkaline primary cells C. acid secondary cells D. alkaline secondary cells

Last Answer : Answer: D

Caution must be exercised during the charging of lead-acid storage batteries as _____________. A. the acid will become weaker B. hydrogen gas is being continuously liberated C. both plates are changing chemically to lead sulfate D. lead peroxide in the negative plate is poisonous

Description : Caution must be exercised during the charging of lead-acid storage batteries as _____________. A. the acid will become weaker B. hydrogen gas is being continuously liberated C. both plates are changing chemically to lead sulfate D. lead peroxide in the negative plate is poisonous

Last Answer : Answer: B

The charging of lead-acid storage batteries will always result in __________. A. dangerous acid burns B. a dangerously explosive gas being liberated C. the danger of lead poisoning D. all of the above

Description : The charging of lead-acid storage batteries will always result in __________. A. dangerous acid burns B. a dangerously explosive gas being liberated C. the danger of lead poisoning D. all of the above

Last Answer : Answer: B

During the charging process of storage batteries, the charging rooms should be well ventilated because __________. A. without ventilation excessive gassing will occur B. highly poisonous gases are released C. highly explosive gases will otherwise accumulate D. without ventilation the battery will not take a full charge

Description : During the charging process of storage batteries, the charging rooms should be well ventilated because __________. A. without ventilation excessive gassing will occur B. highly poisonous gases are ... gases will otherwise accumulate D. without ventilation the battery will not take a full charge

Last Answer : Answer: C

Which is used in storage batteries?

Description : Which is used in storage batteries?

Last Answer : Lead

Element usedin storage '\.~) batteries ~?

Description : Element usedin storage '\.~) batteries ~?

Last Answer : Lead

Maximum consumption of lead is in the manufacture of (A) Storage batteries (B) Solder alloys

Description : Maximum consumption of lead is in the manufacture of (A) Storage batteries (B) Solder alloys

Last Answer : (A) Storage batteries

Explain advantages of storage batteries

Description : Explain advantages of storage batteries

Last Answer : Few advantages of storage batteries are mentioned below: Most efficient form of storing energy portably. Stored energy is available immediately because there is no lag of time for delivering the stored energy ... source for supply of energy. The energy can be drawn at a fairly constant rate.

Explain the application of storage batteries.

Description : Explain the application of storage batteries.

Last Answer : Storage batteries are used for various purposes, some of the applications are mentioned below: For the operation of protective devices and for emergency lighting at generating stations and ... For emergency lighting at hospitals, banks, rural areas where electricity supplies are not possible.

What is used in storage batteries? (1) Copper (2) Tin (3) Lead (4) Zinc

Description : What is used in storage batteries? (1) Copper (2) Tin (3) Lead (4) Zinc

Last Answer : Lead

Why are generators rated in kVA not in kW ?

Description : Why are generators rated in kVA not in kW ?

Last Answer : Because It's rating of generator kva is apparent power. Kw is active power which we use. And one is kvar reactive power.

For a traction transformer circuit breaker state: 1) Rated current and rupturing capacity 2) Any two tests it should be capable of withstanding 3) Overall tripping time and relay time.

Description : For a traction transformer circuit breaker state: 1) Rated current and rupturing capacity 2) Any two tests it should be capable of withstanding 3) Overall tripping time and relay time.

Last Answer : Ans: 1) Rated current --- 750 A and Rupturing capacity --- 500 MVA  2) Any two tests it should be capable of withstanding --- Breaking test , Reclosing test , Endurance test ( any two )  3) Overall tripping time --- 0.14 sec and Relay time --- 0.04 sec 

If the no load voltage of a certain generator is 220V and the rated load voltage is 200V, then the voltage regulation is: a. 1% b. 10% c. 20V d. 9%

Description : If the no load voltage of a certain generator is 220V and the rated load voltage is 200V, then the voltage regulation is: a. 1% b. 10% c. 20V d. 9%

Last Answer : If the no load voltage of a certain generator is 220V and the rated load voltage is 200V, then the voltage regulation is: a. 1% b. 10% c. 20V d. 9%

A 1000W heater is rated to operate at a direct current (DC) of 10A. If the heater is supplied alternating

Description : A 1000W heater is rated to operate at a direct current (DC) of 10A. If the heater is supplied alternating current (AC) for producing the same quantity of heat the value of current should be  a. Iav=10A b. Irms=10A c. Ipeak=10A 

Last Answer : A 1000W heater is rated to operate at a direct current (DC) of 10A. If the heater is supplied alternating current (AC) for producing the same quantity of heat the value of current should be Irms=10A

Low voltage circuit breakers have rated voltage of less than___________-.

Description : Low voltage circuit breakers have rated voltage of less than___________-. A. 220 V B. 400V C. 1000 V D. 10,000 V.

Last Answer : Low voltage circuit breakers have rated voltage of less than 1000 V.

A 3-phase circuit breaker is rated at 1250 A, 2000 MVA, 33 kV, 4s. Its making current capacity will be

Description : A 3-phase circuit breaker is rated at 1250 A, 2000 MVA, 33 kV, 4s. Its making current capacity will be   (a) 35 kA (b) 89 kA (c) 79 kA (d) 69 kA

Last Answer : 89

An alternator is delivering rated current at rated voltage and 0.8 power-factor lagging. For delivering rated...

Description : An alternator is delivering rated current at rated voltage and 0.8 power-factor lagging. For delivering rated current at rated voltage and 0.8 poWer—factor leading, the required excitation will be:  (A) less  (B) more (C) more or less (D) the same

Last Answer : An alternator is delivering rated current at rated voltage and 0.8 power -factor lagging. For delivering rated current at rated voltage and 0.8 power -factor leading, the required excitation will be: more 

What would be the total power drawn from the supply, when two heaters, rated at 1000 W, 250 V each ...

Description : What would be the total power drawn from the supply, when two heaters, rated at 1000 W, 250 V each are connected in series across a 250 V, 50 Hz supply?  (A) 1000 W (B) 500 W (C) 250 W (D) 2000 W

Last Answer : Answer:B. One heater 1000W, 250V resistance is 62.5ohm. Two Series connected heaters so, 62.5+62.5=125ohm. Current in the series circuit is 250V/125ohm = 2A. Total power drawn = current2 X R = 22 x 125 = 500W.

A single phase transformer rated at 3000 kVA, 69 kV 4.16 kV, 60 Hz has a total internal impedance Zp of 127...

Description : A single phase transformer rated at 3000 kVA, 69 kV 4.16 kV, 60 Hz has a total internal impedance Zp of 127 ohm, referred to the primary side. Calculate the primary current if the secondary is accidentally short circuited.  (A) 43.5 A (B) 543 A (C) 9006 A (D) 721 A 

Last Answer : 543A

A 60 Hz, 4 pole turbo generator rated 100 MVA, 13.8 KV has an inertia constant of 10 MJ/MVA. Find the stored...

Description : A 60 Hz, 4 pole turbo generator rated 100 MVA, 13.8 KV has an inertia constant of 10 MJ/MVA. Find the stored energy in the rotor at synchronous speed.  (A) 10 MJ (B) 100 J (C) 1000 J (D) 1000 MJ 

Last Answer : c

if the rated voltage from the power lines is applied to the primary of a single-phase transformer...

Description : if the rated voltage from the power lines is applied to the primary of a single-phase transformer which is operated on no-load, then

Last Answer : if the rated voltage from the power lines is applied to the primary of a single-phase transformer which is operated on no-load, then input voltage is sinusoidal and input current is non sinusoidal.

Capacitors for power factor correction are rated in?

Description : Capacitors for power factor correction are rated in?

Last Answer : Capacitors for power factor correction are rated in kVAR.

A heater is rated as 230 V, 10 kW, A.C. The value 230 V refers to?

Last Answer : A heater is rated as 230 V, 10 kW, A.C. The value 230 V refers to r.m.s. voltage.

Why can't we store AC in batteries instead of DC ?

Description : Why can't we store AC in batteries instead of DC ?

Last Answer : Because the direction of the current changes in AC electricity, you cannot directly store the power. Placing a capacitor in an AC circuit has no effect on the alternating flow of the electricity. The only ... is indirectly, by storing DC and then using a power inverter to convert the DC to AC.

Steps to carry out the maintenance of lead acid batteries

Description : Steps to carry out the maintenance of lead acid batteries

Last Answer : Steps to carry out the maintenance of lead acid batteries: 1) Keep the container surface dry by using dry cloths. 2) Tighten the terminal connections. 3) Battery should not be discharged ... 9) During initial charging use fresh electrolyte. 10) Avoid overcharging and short circuit of plates.

State necessity of series connection and parallel connection of batteries.

Description : State necessity of series connection and parallel connection of batteries.

Last Answer : Necessity of series connection of batteries: 1. The batteries are available with some specific terminal voltages. e. g. 6V, 12V, 24V, 48V etc. 2. If we want to have some terminal voltage other than ... batteries of capacities I1, I2, I3, I4 . are connected in parallel, all having identical emfs.

What are the different methods of charging batteries? Explain any one of them.

Description : What are the different methods of charging batteries? Explain any one of them.

Last Answer : There are two methods of charging of batteries:  1) Constant current method 2) Constant voltage method  1) Constant current method of charging batteries:  In this method, the ... shops and in automotive equipment.  In this method time of charging is almost reduced to half. 

State the function of following auxiliaries used in electric locomotive, i) Batteries ii ) Compressor iii ) Blower iv ) Exhauster

Description : State the function of following auxiliaries used in electric locomotive, i) Batteries ii ) Compressor iii ) Blower iv ) Exhauster 

Last Answer : Ans: 1) Batteries - supply to run baby compressor which supplies air for initial raising of pantograph and closing of air blast circuit breaker. 2) Compressor - supply air for operation, control and ... blower, reactor blower, SCR blower, traction motor blower etc. 4) Exhausters - for vacuum brakes.

Which of the following batteries is rechargeable?

Description : Which of the following batteries is rechargeable? A) Leclanche cell B) Zinc–carbon cell C) Bunsen cell D) None of these

Last Answer : Which of the following batteries is rechargeable? A) Leclanche cell B) Zinc–carbon cell C) Bunsen cell D) None of these

Secondary batteries are usually

Last Answer : Secondary batteries are usually Wet cells and heavy in weight.