Description : What is thermometer? How it works?
Last Answer : A thermometer is a device used to measure the temperature. When some hot object touch the bulb of the thermometer, the liquid inside the narrow tube expands and rises up and we can measure the temperature by reading scale.
Description : A bimetallic strip commonly found in home furnace thermostats works because of the difference in this property of the two metals. Is it: w) thermal shock x) thermal conductivity y) thermal expansion z) thermal diffusivity
Last Answer : ANSWER: Y -- THERMAL EXPANSION
Description : Describe a simple experiment to study the thermal expansion of Gases.
Last Answer : I. Take an empty flask and fit a cork into the mouth of the flask. II. Limb of the U shaped glass tube through the cork. III. Clamp the flask in a stand as shown in fig. IV. Dip the ... and produce bubbles in water. X. On cooling flask contracts and water level is pulled up in the glass tube.
Description : Explain the expansion of liquids and with the help of an experiment.
Last Answer : I. Take an empty flask and fit a cork into its mouth. Pass short limb of U-shape glass tube through it. II. Clamp the flask in a stand. III. Dip the long limb of U-shaped tube in the water ... . On cooling, air in the flask contracts, so suction is created which pulls the water in the glass tube up.
Description : Describe the effects of expansion and contraction of solids.
Last Answer : I. In hot summer, concrete in roads expands and road surface crack. II. Two sections of railway track are laid with gaps. If there are no gaps, then they may be de-shaped due to expansion ... gap is also present at this end. So that it can move forward and backward during expansion and contraction.
Description : Explain the damages which are caused by expansion or contraction by giving two examples.
Last Answer : I. In hot summer, the concrete used in roads expands. If no space is provided for its expansion, then road surface crack. II. Two sections of railway track are laid with gaps. If there are no gaps, then they may be de-shaped due to expansion in summer.
Description : Explain the peculiar (strange) behavior of water during contraction and expansion.
Last Answer : On heating the liquid water from 0 0C to 4 0C, it contracts and its volume decreases while its density increases. On cooling from 4 0C to 0 0C it expands, its volume increases and density decreases.
Description : What is Rivet and Riveting?
Last Answer : A rivet is a small, cylindrical and smooth shaft whose one end is swollen (called Head) while the other end is flat. Hot rivets are used to join the metal plates. The process in which two metal plates are joined together by means of rivets is called riveting.
Description : What is thermal expansion? Explain it with the help of experiment.
Last Answer : The expansion of material objects on heating is called thermal expansion. I. Take a metallic sphere which can pass easily through a ring. II. Remove the sphere out of the ring. III. Now heat the ... expansion due to heating. V. On cooling the sphere, it attracts and passes through the ring again.
Description : When a vessel containing a liquid is heated, the level of liquid initially falls and then rises up. Why does it happen so? OR Describe the irregular expansion of liquid.
Last Answer : On heating the liquid water from 0 degree C to 4 degree C, it contracts so the level of liquid initially falls. But after 4 degree C it expands so liquid rises up.
Description : Why do gases expand faster than liquids and solids?
Last Answer : Because the particles of gases are widely disturbed i.e. their particles are far apart from each other and they free to move. Other
Description : Why do hot air balloons rise up?
Last Answer : Since hot gases rose up in air, so hot air in balloon causes it to rise up.
Description : Why gaps are left between two sections of a railway track?
Last Answer : The gaps allow the expansion and contraction of rails during summer and winter season.
Description : Why one end of the iron girders is placed on rollers in construction of bridges?
Last Answer : One end of iron girders is placed on the rollers along with a gap at this end so that girder can move forward and backward during expansion or contraction.
Description : Why is water not used instead of mercury in thermometers?
Last Answer : Because Mercury has high coefficient of expansion per unit rise in temperature
Description : Write down the effects of heating and cooling on gases
Last Answer : Gas expand on heating and contract on cooling
Description : Write down the effects of heating and cooling on solids
Last Answer : Solid expand on heating and contract on cooling
Description : In the illustration, the component labeled D is a ______. EL-0033 A. fixed contact B. moving contact C. trip bar D. bimetallic strip
Last Answer : Answer: B
Description : A bimetallic strip is used to convert a temperature change - a) into mechanical displacement b) into electrical displacement c) into neither mechanical nor electrical displacement d) all of the above
Last Answer : A bimetallic strip is used to convert a temperature change - into mechanical displacement
Description : How to know if the Air Con works on a White Rogers Thermostat?
Last Answer : If you can’t just try turning it on, then you could pop off the control box from the base plate and look at the terminal screws where the wires from inside the wall are connected to the thermostat. If you see a yellow wire, that’s the connection to the cooling system and the AC should be wired in.
Description : How does negative feedback works like a thermostat?
Last Answer : Need answer
Description : Which of the following will be the best definition for Testing :- a) The goal / purpose of testing is to demonstrate that the program works. b) The purpose of testing is to demonstrate that the ... does what it is supposed to do. d) Testing is executing Software for the purpose of finding defects.
Last Answer : d) Testing is executing Software for the purpose of finding defects.
Description : The purpose of software testing is to A. Demonstrate that the application works properly B. Detect the defects C. Validate the logical design
Last Answer : A. Demonstrate that the application works properly
Description : Which dental care breath strip works best for someone who has halitosis?
Last Answer : The Crest strips will be just great for someone who needs to refresh their breath often due to bad breath, or halitosis.
Description : How accurate must the bimetallic dial thermometer be for inspecting the temperature of food?
Last Answer : Feel Free to Answer
Description : An electric tachometer receives the engine speed signal from a _______________. A. small generator mounted on the engine B. bimetallic sensing device C. stroboscopic sensing device D. vibrating reed meter generating a voltage proportionate to engine speed
Last Answer : Answer: A
Description : Which of the following is universally employed as the low expansion metal in the bimetallic thermometer, which is an iron-nickel alloy containing 36% nickel and has very low co-efficient of expansion (1/20th of ordinary metals) ? (A) Invar (B) Constantan (C) Chromel (D) Alumel
Last Answer : (A) Invar
Description : The high expansion metal normally used in the bimetallic thermometer is __________ temperature measurement. (A) Brass for low (B) Nickel alloys for high (C) Both 'a' & 'b' (D) Aluminium for all
Last Answer : (C) Both 'a' & 'b'
Description : Why bimetallic washers provided in aluminium copper transition joints?
Last Answer : To avoid galvanic corrosion failure.
Description : The inner core ofan optical fiber is _______ in composition. A) glass or plastic B) copper C) bimetallic D) liquid
Last Answer : glass or plastic
Description : The inner core of an optical fiber is in composition. a. copper b. liquid c. glass or plastic d. bimetallic
Last Answer : c. glass or plastic
Description : The instrument for measurement of flow/ velocity is________. A. Bimetallic. C) Turbine meter. B. Manometer. D) Wattmeter
Last Answer : Turbine meter
Description : To protect most of the electrical equipment handling low power, the types of relays used are (a) thermocouple (b) electronic and bimetallic (c) both (a) and (b) (d) none of the above
Last Answer : (c) both (a) and (b)
Description : Explain construction and working of Bimetallic Thermometer with neat sketch.
Last Answer : Bimetallic thermometer: Diagram Construction and working: Bimetallic strip consists of two strips of metal such as invar and brass welded together, each strip made from a metal having a ... The movement of the bimetallic strip is utilized to deflect a pointer over a calibrated scale.
Description : Describe construction of bimetallic thermometer
Last Answer : Construction and working : Figure shows construction of bimetallic thermometer, it consists of bimetallic strip usually in the form of a cantilever beam, which is prepared from two thin strips ... . This type of thermometer is used in homes and offices for indicating ambient temperature.
Description : Explain working principle of bimetallic thermometer.
Last Answer : Working principle: Figure shows construction of bimetallic thermometer, it consists of bimetallic strip usually in the form of a cantilever beam, which is prepared from two thin strips of different ... the thickness of the metal. Pointer is attached to the free end to indicate the temperature
Description : Can Arduino be used for building a smart thermostat?
Last Answer : Yes, Arduino can be used for building a smart thermostat by using sensors to measure temperature and humidity, and by using actuators to control the heating, cooling, or ventilation systems, and by using communication modules to transmit data to a mobile app or a control system.
Description : Using tape... how can I trick a thermostat into thinking the room is hotter?
Last Answer : 76f is freaking hot unless you work in a nursing home. Most manual switches have a little mercury type sensor when it gets to the set temp the mercury trips the switch and shuts down the ... a lot more comfortable for the workers, and would up productivity as well again making the company money.
Description : Does the temperature you set your house thermostat at make any difference in the electric bill?
Last Answer : I've wondered this. I think it does matter a little, because the sun coming through the windows, and beating down on the roof, an the hot air that seeps in through cracks in the house are part of the ... of 77 or 78 might not make a huge difference, but probably a setting of 72 vs. 78 is noticeable.
Description : Do men come with a defunct thermostat?
Last Answer : Women have 2 extra layers of subdermal fat than men do. This may have something to do with it.
Description : What is the cost of changing a thermostat for a vauxhall meriva?
Last Answer : answer:Welcome to Fluther. You might enjoy this site very much, except it doesn’t list Vauxhall as a make. Perhaps there’s something similar in your part of the world?
Description : Thermostat in my car was changed and the temp. gauge still rises, what can my problem be?
Last Answer : There are a lot of different things that could cause this: clogged radiator, bad water pump, problem with the AC compressor, and many more. There isn't enough information to give a good diagnosis. The fact that ... . It's a good idea to get it checked anyway, so that the engine doesn't blow up.
Description : Will an "outdated" round thermostat work with a new air conditioner?
Last Answer : answer:Get into a time machine and return to the past. You need someone (electrician, guy who installed the AC) to explain how to use the thermostats. There is probably useful info in ... a galaxy. And Egyptians probably feel equally put upon when they buy appliances with instructions in English.)
Description : Roughly, how much does it cost to replace a car's thermostat (by a mechanic)
Last Answer : It depends on how long it will take the guy to do it. Some cars need to be extensively disassembled to do this.
Description : For places that are typically hot year round, what should the thermostat be set at?
Last Answer : 78. 85 when you’re not home. (If you are balancing comfort and effecency. )
Description : Can anyone help get my white rogers thermostat working?
Last Answer : Call your landlord ASAP!
Description : How low do you set your thermostat in winter?
Last Answer : Normally 60 -62 degrees Fahrenheit at night and during the day when I am working inside the house. I turn it up to about 65–67 degrees in the evening when I might be sitting and not moving around so much. I also cover up with a blanket and if we have company I turn up the heat a bit for them.
Description : Is the electrical buzz that is preceding the thermostat/cooling system kicking in a sign that a component is about to die or that I'm at risk of an electical fire?
Last Answer : answer:Where exactly is the noise coming from? The thermostat or the cooler? - If the thermostat, try removing the faceplate. Does it have one of those mercury switches (little glob of mercury in a glass tube) ... the system to run without that fan. You'll probably want to get a pro to check it out.
Description : Will the same thermostat work for both oil and gas heaters?
Last Answer : Check with your furnace guy. That said, in two different houses I’ve had I switched from oil to gas and didn’t have to switch out the thermostat.
Description : What temperature do you keep your thermostat at?
Last Answer : 83 degrees when I’m not there, and 81 when I am, and I live in Vegas. Lower than that and my power bill will sky rocket in the summer.