using trendline, discuss relationship between temperature measured by thermocouple compared to thermometr
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- A thermocouple with test junction at t°C on gas thermometer scale and Reference junction at ice point gives the e.m.f. as e = 0.20 t – 5 × 10^–4t^2 mV. The millivoltmeter is calibrated at ice and steam points. What will be the reading on this Thermometer where the gas thermometer reads 70°C ?During a test on a 5 cylinder four stroke IC diesel engine with a cylinder bore and stroke length of 267 mm and 293 mm respectively, running at 436 rpm, the following results were obtained: Mass on dynamometer mass hanger(arm length=0,823 m)=219,7 kg, indicated mean effective pressure=452 KPa, fuel consumption(with Qnet=39,8 MJ/kg, density=0,944 kg/l)=6 ml/s. Take acceleration due to gravity as 9,81 m per square seconds. Calculate: 1.the indicator power to 2 deimal places(not in kilos unit) 2.the brake thermal efficiency and mechanical efficiency in decimal form to 3 decimal places. 3. the brake power( not in kilos)The transducer specified in Table 1.1 is chosen to measurea nominal pressure of 500 cm H2O. The ambient temperature is expected to vary between 18 ∘C and 25 ∘C duringtests. Estimate the possible range (magnitude) of each listedelemental error affecting the measured pressure refering to the solution provided online, Sensitivity error(eK) = (±0.0025)(500 cm H2O)= ± 0.75 cm H2O = ± 0.00375 V how do you get 0.75?? shoud it not be 1.25? according the answer, for sensitivity
- During testing of single cylinder two-stroke petrol engine following data were obtained. Brake torque = 640 Nm, cylinder diameter 21 cm, speed 350 rpm, stroke length = 28 cm, mean effective pressure = 5.6 bar, oil consumption = 8.16 kg/h, calorific value of the fuel = 42,705 kj/kg. Determine: Srake thermal efficiencyThe mechanical friction mean effective pressure of a 4-cylinder Sl engine has a quadratic function with a = 80, b = 95 and c = 130. Three measurements have been done at three different engine rotational speeds N. The amep is found equal to 12.3, 21.4 and 28.7 kPa and the pmep is found equal to 25, 63.55 and 107.6 kPa at N equal to 2200, 4500 and 6500 rpm respectively. If the net indicated mean effective pressure is equal to 558.2 kPa at N = 3740 rpm, the mechanical efficiency is equal to (%): Select one: O a. 71 O b. 84 O c. 87 O d. 76 O e. 91The shear modulus, G, of an alloy can be determined by measuring the angular twist, θ,resulting from a torque applied to a cylindrical rod made from the alloy. For a rod of radius Rand a torque applied at a length L from a fixed end, the modulus is found by G=2LT/pR4θ.Examine the effect of the relative uncertainty of each measured variable on the shearmodulus. If during test planning all of the uncertainties are estimated to be 1%, what is theuncertainty in G?
- The following data were obtained during a test of six cylinder otto cycle engine. Speed 2000 rpm, bore 3.5 in stroke 3.75 in, specific fuel consumption base on brake hp.66 lbs. / bhp-hr, brake arm 1.05 ft. HHV of fuel 20000 Btu/lb, Brake Torque 133 ft-lb, friction torque 40 ft-lb room temperature 90 F. barometric pressure 14.7 psia Find:a.) BHP=b.) BMEP=c.) IMEP=d.) IHP=e.) BRAKE THERMAL EFFICIENCY=f.) INDICATED THERMAL EFFICIENCY=A diesel engine produces 500 kW at 3800 rpm while consuming 0.02975 kg/s of fuel. During operation, data shows that its mechanical energy loses 17%, the actual volume of air going into each cylinder is 90% (The volumetric efficiency has a negligible variation) and the actual fuel to air ratio is 0.05. If the ambient temperature at this location is 18 0C and the standard atmospheric condition is 14 0C hotter with pressure of 100 kPa, what are the standard parameters of the engine: a. Brake Power, kW b. Indicated Specific Fuel Consumption, kg/kW-hr c. Mass of air, kg/s d. Indicated Mean Effective Pressure, kPa WRONG ANSWERSSSSSS a. 415 b. 0.2147 c. 0.595 d. 35.31 THESE ARE THE WRONG ANSWERS. SHOW CORRECT ANSWERDuring a test on a five-cylinder four-stroke IC diesel engine with a cylinder bore and stroke length of 260 mm and 305 mm respectively, running at 503 r/min, the following results were obtained: Mass on Dynamometer mass hanger (arm length = 0.825 m) 221.9 kg Indicated mean effective pressure 400 kPa Fuel consumption (with Qnet,v = 39.8 MJ/kg, density = 0.944 kg/l) 6 ml/s Take acceleration due to gravity as 9.81 m per square seconds Calculate the brake power .
- Dusty air at a fertilizer plant flows through a 13% efficient cyclone and then through an ESP, The inlet air to the cyclone has a dust loading of 80 grains/cubic foot. In order to meet a standard of 98,5% collection efficiency for the fertilizer plant as a whole, what is the allowable concentration of dust (in grains/cubie foot) in the air that exits from the ESP?a. 0.15 gr/ft3 b 1.2 gr/ft3c. 21.6 gr/ft3 d. 58.4 gr/ft3During a test on a 4-cylinder four-stroke IC diesel engine with a cylinder bore and stroke length of 317 mm and 307 mm respectively, running at 481 r/min, the following results were obtained: Mass on Dynamometer mass hanger (arm length = 0.825 m) 205 kg Indicated mean effective pressure 403 kPa Fuel consumption (with Qnet,v = 39.8 MJ/kg, density = 0.944 kg/l) 6 ml/s Take acceleration due to gravity as 9.81 m per square seconds Calculate the brake thermal efficiency in decimal form.In the measurement with the thermoeleman circuit, whose voltage-temperature relation is linear and the calibration coefficient is 0.05 mV/ºC, it was understood that the temperature of the reference end is higher than 0ºC after the measurement point temperature is calculated as 80ºC. To resolve this error, this time the measuring tip was immersed in the water-ice mixture and a deviation of 0.15 mV was observed at the millivolt meter. How many ° C is the first value measured as 80 ° C? a. 76.25 b. 77.50 c. 78.00 d. 75.00 e. 77.00