Description : Why are hydrocarbons currently the main source of world’s electrical energy and heat source?
Last Answer : The energy produced when burnt often this energy is used directly as heat as in home heaters which use either oil or natural gas.
Description : Moisture accumulating in electric motors and generator windings having a cold insulation resistance greater than 50,000 ohms may be baked out with internal heat. This heat can be developed by ____________. ... an electric welder and feeding it into the armature while running the motor at full speed
Last Answer : Answer: A
Description : Which of the following is/are true concerning electric power operated watertight door systems? A. Each motor driven door must use the main bus as its source of power. B. Each distribution panel for ... to permit quick activation of the system. D. Each system must have a separate branch circuit.
Last Answer : Answer: D
Description : Before Sir Richard Burton attempted to discover the source of the Nile, which was the world's longest river?
Last Answer : the nile
Description : Which endangered animal is the source of the world’s finest, lightest, warmest and most expensive wool – the shahtoosh? (a) Nilgai (b) Cheetal (c) Kashmiri goat (d) Chiru
Last Answer : (d) Chiru
Description : What is the main source of heat ?
Last Answer : The main source of heat is the sun.
Description : What is the source of electric energy in an artificial satellite? (a) A mini nuclear reactor (b) A dynamo (c) A thermopile (d) Solar cells
Last Answer : Ans:(d)
Description : True or False: 300 years from now when humanity studies the late 1990's into the 2000's outsourcing will be main reason why the U.S.A. lost it's grip on being the worlds #1 economic superpower?
Last Answer : How about spiraling national debt incurred in no small part due to our most recent imperialist adventures?
Description : The Classical example of redox reaction is Combustion of fossil fuel. During combustion of fossil fuels, the carbon compound in the fossil fuel reacts with oxygen in the presence of a heat source to ... to react with oxygen, so the energy used in portion of combustion is an endothermic reaction.
Last Answer : Combustion of fossil fuel
Description : An electric drill transfer some energy wastefully . aside from heat , what else carries the energy that is transferred wastefully?
Last Answer : sound waves
Description : Heat engine uses ______ energy to produce mechanical work. a. Thermal b. Fluid c. Kinetic d. Electric (Ans:a)
Last Answer : Which of the following is not an internal Combustion (IC) engine? a. Gas engine b. Wankel engine c. Jet engine d. Stirling engine (Ans:d)
Description : A photoelectric cell converts – (1) Mechanical energy to electric energy (2) Heat energy to mechanical energy (3) Light energy to chemical energy (4) Light energy to electrical energy
Last Answer : (4) Light energy to electrical energy Explanation: Photoelectric cell or photocell, device whose electrical characteristics (e.g., current, voltage, or resistance) vary when light is incident ... The most common type consists of two electrodes separated by a light-sensitive semiconductor material.
Description : Choose the best definition of dielectric loss. a) Absorption of electric energy by dielectric in an AC field b) Dissipation of electric energy by dielectric in a static field c) Dissipation of heat by dielectric d) Product of loss tangent and relative permittivity
Last Answer : a) Absorption of electric energy by dielectric in an AC field
Description : A thermoelectric engine which consists of two dissimilar electric conductors connected at two junctions maintained at different temperatures, converts (a) Electric energy into heat energy [IES-2006] (b ... energy (c) Mechanical work into electric energy (d) Electric energy into mechanical work
Last Answer : (b) Heat energy into electric energy
Description : Conversion of Heat into electric energy is achieved by using
Last Answer : Thermocouple
Description : Heat energy is converted into electrical energy a. solar cells b. thermocouples c. electric generators d. none
Last Answer : b. thermocouples
Description : A photo-electric cell converts (1) mechanical energy to electric energy (2) heat energy to mechanical energy (3) light energy to chemical energy (4) light energy to electrical energy
Last Answer : light energy to electrical energy
Description : Thermit welding uses the following energy source. (A) Electrical energy (B) Chemical energy (C) Energy of high velocity electrons (D) Heat generated by friction
Last Answer : (B) Chemical energy
Description : Is a thermodynamic system that operates continuously with only energy (heat and work) crossing its boundaries? a. Heat Engine b. Heat Reservoir c. Heat Source d. Heat Sink
Last Answer : Heat Engine
Description : Which of the following is the correct statement of the second law of thermodynamics? A. It is impossible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy ... energy, which can be obtained from a given quantity of heat energy. D. all of the above
Description : According to Clausis statement of second law of thermodynamics (a) heat can't be transferred from low temperature source to high temperature source (b) heat can be transferred for low temperature to ... to high temperature source without the aid of external energy (e) all of the above.
Last Answer : Answer : d
Description : Which of the following represents the perpetual motion of the first kind (a) engine with 100% thermal efficiency (b) a fully reversible engine (c) transfer of heat energy from low ... its own energy (e) production of energy by temperature differential in sea water at different levels.
Description : Biomass energy is w) formed through photosynthesis x) caused by heat due to the large mass of the Earth y) has been used for only a few years z) the predominant source of commercial heat energy in the northern regions of the United States
Last Answer : ANSWER: W -- FORMED THROUGH PHOTOSYNTHESIS