Two oils have the same kinematic viscosity at room temperature. Oil brand A has a viscosity...
Homework Answers
Ans : The oil with lesser viscosity index (oil brand A) has a lesser viscosity at -100C.
Explanation : We know that, Viscosity index is a number which denotes the change in viscosity of fluid with temperature. Lower the viscosity index, the more is the viscosity change with temperature. The oil with higher viscosity index shows a little variation in viscosity with temperature. So, oil with lower viscosity index has has lower viscosity compared to the oil with higher viscosity index. Therefore, at -100C the oil brand A with viscosity index of 100 has lower viscosity compared to the oil brand A with viscosity index of 220.
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Two oils have the same kinematic viscosity at room
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Consider an oil of density p 800 kg/m3, viscosity u 0.01 Pa.s (10 times the viscosity of water), ...
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the above question must be solved using the supplied viscosity table. but I keep getting weird values. can I ple...
the above question must be solved using the supplied
viscosity table. but I keep getting weird values.
can I please have workings and explanation as how to use this table
please.
thank you
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The time, t, it takes to pour aliquid from a container depends on several factors, including the kinematic viscosity, v, of the liquid. In some laboratory tests, various oils having the same density but different viscosities were poured at a fixed tipping rate from small 150-ml beakers. The time required to pour 100 ml of the oil was measured, and it was found that an approximate equation for the pouring time in seconds was t 1 + 9 x 10'...
Consider an oil of density p 800 kg/m3, viscosity u 0.01 Pa.s (10 times the viscosity of water), heat capacity of Cp 2 k]/(kg K) and thermal conductivity of Koll -0.15 W/(mk). This oil flows at mass flowrate of 30 kg/minute through a copper pipe of d- 2 cm inner diameter, with wall thickness of t-1 mm. At the relevant conditions, copper has thermal conductivity of ke 400 W/(m.K). The copper pipe loses heat to the surroundings of Tsurr 20°C...
the above question must be solved using the supplied
viscosity table. but I keep getting weird values.
can I please have workings and explanation as how to use this table
please.
thank you
Question 3 (3 Marks) Consider a journal bearing with the following characteristics: . Radius of 0.02m A clearance of 0.1mm . .A length of 0.02m Running under the following conditions: .Using SAE40 oil for lubrication . Running at 50 rps . Subject to a load of 100N...
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Consider two fluids that have the same viscosity. One of them has a large volumetric expansion coefficient and the other fluid has a small volumetric expansion coefficient. Greater natural convection currents will be initiated in the fluid that has the large volumetric expansion coefficient. True False
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Thermodynamics
A 29-L electrical radiator containing heating oil is placed in a 41-m3 room. Both the room and the oil in the radiator are initially at 10°C. The radiator, with a rating of 1.8 kW, is now turned on. At the same time, heat is lost from the room at an average rate of 0.35 kJ/s. After some time, the average temperature is measured to be 20°C for the air in the room, and 50°C for the oil in the...
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