Thermal Expansion 1. What is the consequence of a steam pipe designed without a loop or an expansion joint? Continuous expansion and contraction of the steam pipe will result to breaking No effect at all Steam pipes will not change in shape Steel pipes will not change in size Question 1 of 55 2. Why is the capillary bore of a Lab thermometer Narrow? For low degree of accuracy For high degree of accuracy For decoration To reduce cost Question 2 of 55 3. Which among the following molecular expansion statements does NOT explain expansion of liquids compared to solids? In liquids the force of attraction is weaker compared to solidsLiquid molecules are farther apart than in solids When a liquid is heated in a volumetric flask, the vibration of liquid molecules increase and the liquid will occupy more space. Liquids are more often more colourless than solidsQuestion 3 of 55 4. Which among the following molecular expansion statements explain expansion of solid? Solids have a strong force of attraction among its molecules When a solid is heated the vibrations of the molecules increase. An increase in temperature increases the kinetic energy among solid particles and weakens its force of attraction. All of above. Question 4 of 55 5. Which of the following is not an application of expansion and contraction? Separating iron fillings from sugar Looped steam pipes Steel bridges with one fixed end and another free Bimetallic strip in a thermostat Question 5 of 55 6. Which of the following is not among the effects of Anomalous expansion of water? Icebergs Bursting of water-pipes in winterWeathering of rocks Rivets Question 6 of 55 7. The temperature of a body/object is the degree of coldness or hotness of a body/object: True False Maybe None Question 7 of 55 8. Which among the following properties of mercury is incorrect? Mercury expands regularly Mercury is opaque and slivery Mercury has a high boiling point of 357 degrees C and high melting point of -39 degrees C Mercury is a poor thermal conductor Question 8 of 55 9. Mention the two liquids used in a liquid in Glass thermometer? Mercury and water Mercury and alcohol Alcohol and oil Mercury is used in both Question 9 of 55 10. Which of the following is not a property required of the liquid used in LIQUID GLASS THERMOMETER? Must be visible Expand or contract uniformly by a large amount over a small temperature range Does not stick in the inside of Glass tube. Have a narrow range of temperature possible in liquid state Question 10 of 55 11. CONVERTING kelvin to degrees C? -273273-272272Question 11 of 55 12. What is the effect of impurities when added in a liquid which is about to be heated i.e. salt in water? No effect It would raise the boiling point It will decrease the melting point None of the above Question 12 of 55 13. The key importance of the CONSTRICTION feature in a clinical thermometer? Enables the temperature of a human body to be accurately reads even when the thermometer is out of contact with the heat source (body) and the mercury in the bulb has contracted. Enables the efficient expansion of mercury in the thermometer Enables the efficient contraction of mercury in the thermometer all of the aboveQuestion 13 of 55 14. Clinical thermometer temperature range is between 35 degrees C - 43 degrees C which makes it suitable to measure body temperature since a healthy person temperature is 37 degrees C. True or False? True False Maybe None Question 14 of 55 15. Aluminum with a linear expansivity of 26/K x 10 to the power of -6 expands more than steel with a linear expansivity of 11/K x 10 to the power of -6 False True Maybe None Question 15 of 55 16. Which of the following is NOT an importance of the knowledge of Linear Expansivity? Knowledge of Linear expansivity is used in the designing of material to ensure they are able to operate well under varying a thermal condition.In building construction concrete is reinforced with steel because they expand at the same ratePlatinum wires are enclosed in glass for electrical insulation because they have similar linear expansivity. The knowledge of linear expansivity is used in fractional distillation of crude oil. Question 16 of 55 17. Freezing point of mercury is? -39 degrees C -35 degrees C 0 degrees C -15 degrees C Question 17 of 55 18. When a metal expands the following occur except? Increase in volume Change in mass No change in mass Decrease in density Question 18 of 55 19. Which of the following statements is not true when you cool down a bimetallic strip containing brass and iron on the same temperature range? Brass will contract more than iron Iron becomes longer than brass for the same temperature range Bimetallic strip bends with iron on the outside of the curveBimetallic strip bends with brass on the outside of the curve. Question 19 of 55 20. Which thermometer has a coiled strip with one fixed end and the other free end attached to a pointer? Sixs minimum and maximum thermometer Bimetallic strip Bimetallic thermometerClinical thermometerQuestion 20 of 55 21. Different liquids expand more than others? False True Maybe None Question 21 of 55 22. SI UNIT of Temperature is Kelvin. True or False? True False Maybe None Question 22 of 55 23. Absolute zero is? The temperature at which the energy of particles in a material is zero The temperature at which a material melts The temperature at which a material evaporates The temperature at which a material sublimes Question 23 of 55 24. The key main property which makes alcohol preferable to mercury in a liquid glass thermometer is? Alcohol has a low boiling point 78 degrees C Alcohol has a high boiling point 78 degrees C Alcohol has a low melting point of -115 degrees C hence preferable for measuring low melting point of systems. Alcohol wets Glass Question 24 of 55 25. Which thermometer is used to record the maximum and minimum temperature recorded in an area? Clinical thermometer Lab thermometer Liquid in glass thermometer Sixs maximum and minimum thermometer Question 25 of 55 26. Boiling point of Alcohol is? 78 68 degrees C 78 degrees C 68Question 26 of 55 27. Expansivity is a measure of the tendency of a particular material to expand? True False Maybe None Question 27 of 55 28. Which of the following physics experiments explain the expansion and contraction of solids? Ball and ring experiment Diffusion through porous materials Bar and gauge experiment None of the above Question 28 of 55 29. Different metals have different rate of expansion? False True Maybe None Question 29 of 55 30. Thermostat is a device used to maintain a steady temperature in devices that need temperature regulation i.e. Air conditioner True False Maybe None Question 30 of 55 31. Temperature is a? Vector quantity Scalar matrixNone of the above Question 31 of 55 32. Which of the following appliances does not use a thermostat? Electric irons Cookers Fridges Electric bell Question 32 of 55 33. Which of the following statements is NOT true when you heat up a bimetallic strip containing Brass and Iron on the same temperature range Brass will expand more than iron since it has a high linear expansivity Bimetallic strip bends with brass on the outside of the curveBrass becomes longer than iron Iron becomes longer than brass for the same temperature change. Question 33 of 55 34. What is the key main property which makes MERCURY preferable to ALCOHOL in a liquid glass thermometer? Mercury has a high boiling point 357 degrees C hence preferable to measure high boiling points Mercury has a high melting point -39 degrees C hence preferable Mercury wets glass Mercury is a bad thermal conductor Question 34 of 55 35. Explain why a grown person is able to wear a 3 year old kids finger ring when it is heated but when the ring is left for a while it is impossible for the man to put on the ring When the ring is heated it expands and increases hence the man able to put it on. When the ring is heated it decreases in size.When the ring is left for a while it gets cold and decreases in size {contacts} hence the man is not able to put it on. all of the aboveQuestion 35 of 55 36. Boiling point of mercury is? 360 degrees C 3 degrees C 357 degrees C 100 degrees C Question 36 of 55 37. CONVERTING degrees C to kelvin? -272273-273272Question 37 of 55 38. When a metal contracts the following occur except? Decrease in volumeChange in mass No change in mass Increase in density Question 38 of 55 39. Name 3 common features of a clinical thermometer or lab thermometer? Capillary bore Glass stem Bulb All of the above Question 39 of 55 40. What are the two main purposes of the glass stem of a thermometer? It surrounds the capillary bore It serves as the magnifying glass for easy reading of the scale To make the thermometer beautiful in design None of the above Question 40 of 55 41. Temperature is among the 7 basic physical quantities True False Maybe None Question 41 of 55 42. Which among the following properties of alcohol is NOT correct? Alcohol is colourless and wets glass Alcohol expands slightly irregularly Alcohol has a low boiling point of 78 degrees C and low melting point of -115 degrees C Alcohol is not transparent and does not need any coloring to be visible. Question 42 of 55 43. Concrete with a linear expansivity of 11/K x 10 to the power of -6 expands more than steel with a linear expansivity of 11/K x 10 to the power of -6 True False Maybe None Question 43 of 55 44. Which of the following describes the anomalous expansion of water? Water contracts when its temperature is raised from 0 degrees C to about 4 degrees C Above 4 degrees C the water expands with increase in temperature As water contracts between 0 degrees C - 4 degrees C its volume is reduced hence it has the maximum density slighter higher than 1 g/cm3. All of above Question 44 of 55 45. Why are railway-line bolt holes oval in shape? To allow expansion of boltsTo allow contraction of bolts To allow free expansion and contraction of the rails with varying temperatureNo ideaQuestion 45 of 55 46. Mention the reasons why Telephone wires are loosely fixed To allow for contraction during cold weather To allow expansion during hot weather to prevent any blackoutNone of the above Question 46 of 55 47. A Thermometer is an instrument used for measuring temperature? True False Maybe None of above Question 47 of 55 48. The clinical thermometer bulb has a thin glass wall for effective heat transmission between the liquid and the source (body/object). True or False? False True Maybe None Question 48 of 55 49. What is a bimetallic strip? Two metals of different linear expansivity riveted together Four or metals riveted together chineese metals bought at cheap priceNone of the above Question 49 of 55 50. Freezing point of alcohol is? 115 degrees C -110 degrees C -15 degrees C -115 degrees C Question 50 of 55 51. Which of the following occurs when you heat a metal e.g. iron and let it cool? No change in mass Change in volume Change in density All of above Question 51 of 55 52. Which of the following statements does not describe the clinical thermometer? Used mainly to measure human body temperature Its temperature range is about 35 degrees C-43 degrees C It has a constriction feature in the glass bore It uses alcohol mainly Question 52 of 55 53. Which of the following liquids expand more than the rest? Mercury Water Alcohol Oil Question 53 of 55 54. Which among the following molecular expansion statements explain expansion of gases? Gas molecules have a weaker force of attraction than in liquidGas molecules are farther apart than in liquids and solids When a gas is heated its molecules gain more kinetic energy and move farther apart occupying more space. All of the above Question 54 of 55 55. Why do steel bridges have one end fixed and the other end free? To allow expansion and contraction of the steel bridges during warm and cold weather respectively. For accommodating the weight of the people and cars For decoration for security issuesQuestion 55 of 55 Loading...
