Out of electric heater and heat pump, which is economical in operation ?

Out of electric heater and heat pump, which is economical in operation ?
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1 Answer

Answer :

Heat pump.
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To pump water from a water reservoir 3 m deep and maximum water level at 135 m, a pump is installed to lift water up to R.L. 175 m at a constant rate of 36,00,000 litres per hour. If the length of the pipe is 1506 m and f = 0.01, ignoring other minor losses and assuming the economical diameter from Lea's formula D = 1.2 Q, the water horse power of the pump is (A) 400 (B) 450 (C) 500(D) 600

Description : To pump water from a water reservoir 3 m deep and maximum water level at 135 m, a pump is  installed to lift water up to R.L. 175 m at a constant rate of 36,00,000 litres per hour. If the length  of the ... the water horse power of the pump is  (A) 400  (B) 450  (C) 500 (D) 600

Last Answer : (D) 600

Pick out the wrong statement. (A) Close circuit grinding is more economical than open circuit grinding (B) Cod oil, beef tallow or aluminium stearates are used as grinding aids in cement 'industries' (C) The equipment used for the removal of traces of solids from a liquid is called a classifier (D) Size enlargement is a mechanical operation exemplified by medicinal tablet making

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Description : For low load operation more economical engine is a. petrol engine b. diesel engine c. muticylinder engine d. two stroke engine

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Description : In closed circuit grinding as compared to open circuit grinding, the (A) Specific surface of product is more (B) Product has lesser size uniformity (C) Production rate at a given limiting size is lower (D) Operation is economical

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The value of ‘L/mG’ ratio for economical absorption operation ranges from (A) 0.5 to 0.8 (B) 0.8 to 1.2 (C) 1.25 to 2.0 (D) 2.5 to 3.5

Description : The value of ‘L/mG’ ratio for economical absorption operation ranges from (A) 0.5 to 0.8 (B) 0.8 to 1.2 (C) 1.25 to 2.0 (D) 2.5 to 3.5

Last Answer : (C) 1.25 to 2.0

The most economical channel section for the fluid flow is the one for which the discharge is maximum for a given cross-sectional area. Vertical velocity distribution in an open channel for laminar flow can be assumed to be (A) Parabolic (B) Hyperbolic (C) Straight line (D) None of these

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The fundamental goal of energy management is to produce_ _ _ . A) least cost and least environmental effect. B) economical management. C) goods and services. D) none of the above

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Last Answer : goods and services.

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Description : Energy is one of the major inputs for the _ _ _ of any country. A) Environmental developement. B) political development. C) Economical development. D) None of the above

Last Answer : Economical development.

Which one of the major inputs for the economical developement of any country. A) management. B) Energy. C) Power. D) planning

Description : Which one of the major inputs for the economical developement of any country. A) management. B) Energy. C) Power. D) planning

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Description : What is the difference between heat engine & heat pump?

Last Answer : Heat Engine produces work and transfers energy from high temp. to low temp source medium. In Heat pump external work is needed to transfer energy from low to high temp. medium.

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Description : Recovery of waste heat from hot fluid to fluid is called: a) thermo compressor b) waste heat recovery boiler c) heat Pump d) economizer

Last Answer : heat Pump

Capillary wick is a part of a) heat pump b) heat wheel c) heat pipe d) regenerator

Description : Capillary wick is a part of a) heat pump b) heat wheel c) heat pipe d) regenerator

Last Answer : heat pipe

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Description : Recovery of heat from dryer exhaust air is a typical application of: a) Waste heat recovery boiler b) Heat pump c) Heat wheel d) Economizer

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Description : Which of the following thermodynamic devices operates the reverse of the heat engine?  a. Thermal pump  b. Thermal evaporator  c. Thermal condenser  d. Thermal equilibrant

Last Answer : Thermal pump

Which are more economical, gas or electric water heaters?

Description : Which are more economical, gas or electric water heaters?

Last Answer : Gas heaters can be more economical. If there is a high supply of gas in the area it would have cheaper prices. Electric can be cheaper in other areas though.

Tungsten is used for the manufacture of the filament of an electric bulb, because – (1) It is a good conductor (2) It is economical (3) It is malleable (4) It has a very high melting point

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Last Answer : (4) It has a very high melting point Explanation: Tungsten is used because it has the highest melting point of all the metallic elements. It melts at 3410 degrees Celsius. When current passes ... bulb. The first successful light bulb filaments were made of carbon (from carbonized paper or bamboo).

Tungsten is used for the manufacture of the filament of an electric bulb, because (1) It is a good conductor (2) It is economical (3) It is malleable (4) It has a very high melting point

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Last Answer : It has a very high melting point

It is always economical to improve the power factor of an electric installation to

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Last Answer : (A) Get economical temperature difference by using moderate pressure steam

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Do I turn off an electric water heater at a vacation home during the off season?

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State difference between the wire used in the element of an electric heater and in a fuse wire. -Science

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An electric heater of 1000 W is used for two hours in a day? What is the cost of using it for a month of 28 days, if one unit costs 3.00 rupees? -Physics 9th

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An electric immersion heater of `1.08 kW` is immersed in water . After it has reaches a temperature of `100^(@)C` , how much time will be required to

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How much will your electric bill go up using a 350 watt heater?

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What is the btu hour output of an electric heater rated at 15 kilowatts?

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How much does an electric pool heater run?

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Last Answer : Pool electric heat pump prices differ according to the size of the heat pump and the services offered. Pool heat pump prices range between $2500 at the low end, and $4800 on the high end.

Whjat is one of the most effieicent electric wall heater brands?

Description : Whjat is one of the most effieicent electric wall heater brands?

Last Answer : Dayton is one of the most effieicent electric wall heater brands. You can read more at www.heater-home.com/recommended-baseboard-heaters.aspx

What is the most energy efficient electric heater?

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Last Answer : Yes, you can set the temperature on this device.

What are common electric water heater repair problems?

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Last Answer : In general a water heater will only last so long.The major problems are with the thermostat and the heating element.You'll have to replace the thermostat occasionally.If the heating element goes out it's time for a new water heater.

Electric Water Heater?

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Where can I find information about electric water heater?

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Heating element of an electric heater is made up of _____? A. Tungsten B. Graphite C. Chromium 26 D. Nichrome

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Last Answer : ANSWER: D

What material is used to make electric heater coil? (1) Copper (2) Iron (3) Silver (4) Nichrome

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Last Answer : (4) Nichrome Explanation: Nichrome is a non-magnetic alloy of nickel, chromium, and often iron, usually used as a resistance wire. Patented in 1905, it is the oldest documented form of resistance heating ... is corrosion-resistant, and has a high melting point of about 1400 degree C (2552 degree F).

Nichrome wire is used in an electric heater because _______. (1) It has high resistance (2) It has high melting point (3) It can resist a current upto approx 5 amperes (4) For all of the above reasons

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Last Answer : (4) For all of the above reasons

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The main purpose of an electric space heater installed in a large AC generator is to _____________. A. keep the lube oil warm for quick starting B. prevent moisture from condensing in the windings when the machine is shutdown C. prevent the windings from becoming brittle D. prevent acidic pitting of the slip rings

Description : The main purpose of an electric space heater installed in a large AC generator is to _____________. A. keep the lube oil warm for quick starting B. prevent moisture from condensing in the ... is shutdown C. prevent the windings from becoming brittle D. prevent acidic pitting of the slip rings

Last Answer : Answer: B

The main purpose of an electric space heater installed in a large AC generator is to _____________. A. prevent the windings from becoming brittle B. prevent moisture from condensing in the windings during shutdown C. prevent acidic pitting of the slip rings D. keep the lube oil warm for quick starting

Description : The main purpose of an electric space heater installed in a large AC generator is to _____________. A. prevent the windings from becoming brittle B. prevent moisture from condensing in the windings during ... C. prevent acidic pitting of the slip rings D. keep the lube oil warm for quick starting

Last Answer : Answer: B

A delayed-action fuse is most frequently used in which of the listed circuits? A. Lighting circuit B. Motor circuit C. Electric heater circuit D. Radar circuit

Description : A delayed-action fuse is most frequently used in which of the listed circuits? A. Lighting circuit B. Motor circuit C. Electric heater circuit D. Radar circuit

Last Answer : Answer: B