Bissoy.com
Doctors Medicines MCQs Q&A

Calculate the HCV and NCV of the coal for the following data. Weight of the coal=0.8g Water equivalent of calorimeter=460g Weight of the water=2600g Rise in temperature=2.42oC Cooling corrections=0.052oC Fuse wire corrections=10 calories H=6% and assume latent heat of steam=600cal/g.

Calculate the HCV and NCV of the coal for the following data. Weight of the coal=0.8g Water equivalent of calorimeter=460g Weight of the water=2600g Rise in temperature=2.42oC Cooling corrections=0.052oC Fuse wire corrections=10 calories H=6% and assume latent heat of steam=600cal/g. Correct Answer 9131.4cal/g

We know the formula for HCV and that is -fuse wire corrections there W is the weight of the water and w is the water equivalent and t2 and t1 are the final and initial temperatures. Substitute the values to get the HCV and for NCV=HCV – (0.09H*latent heat of steam).

Related Questions

While calculating HCV, if we need to apply the fuse wire, acid and cooling corrections then what is the formula for HCV? /weight of fuel b) HCV = /weight of fuel c) HCV = /weight of fuel d) HCV = /weight of fuel
A sample of coal containing the following elements: C=90%; H=5%; ash=4%; weight of the coal burnt=0.90g; weight of the water taken=600g; water equivalent of bomb calorimeter=2000g; rise in temperature=2.48oC; fuse wire correction=10cal; cooling correction=0.02oC; acid correction=50 cal. Calculate net and GCV of coal in cal/g. Assume latent heat of steam is 580cal/g.
Determine the water equivalent of the bomb calorimeter apparatus which gave following data during experiment: Weight of benzoic acid taken = 2.12 gm, Weight of water taken in calorimeter = 2.5kg, Initial temperature= 16.970, Final temperature = 18.650, Cooling correction = 0.035 0C, fuse wire correction = 20 calories and cotton thread correction = 2.2 calories? (Calorific value of benzoic acid=6324)
Which of the following statements is/are correct? 1. A fuse wire is made of 37% lead and 63% tin 2. A fuse wire is made of 63% lead and 37% tin 3. A fuse wire has high resistance and low melting point 4. A fuse wire has low resistance and high melting point
In a bomb calorimeter experiment, following data was obtained: x = 0.85gm, W = 2.5kg, w = .5kg, observed rise in temperature = 2.25 0C, tA = 38.6 calories, tF = 6.8 calories, tT = 1.9 calories and tC = 0.05 0C. Calculate net calorific value if the coal contains 10 % hydrogen?
Consider the following statements for cooling towers: 1. Cooling tower is an artificial device used to cool the hot cooling water coming out of condenser more effectively. 2. The amount of water usually lost with induced draft cooling tower ranges from 5% to 6% by evaporation. 3. The amount of water usually lost with induced draft cooling tower ranges from 7% to 8% by drift losses. 4. The rate of evaporation of water and its cooling effect on the remaining water depends upon the relative humidity of air passing through the tower. Which of the above statements are correct?
In a surface condenser, the water flowing through a series of tubes at the rate of 200 kg/hr is heated from 15 degree Celsius to 75 degree Celsius. The steam condenses on the outside surface of tubes at atmospheric pressure and the overall heat transfer coefficient is estimated at 860 k J/m2 hr degree. Find the effectiveness of the heat exchanger. At the condensing pressure, stream has a saturation temperature 0f 100 degree Celsius and the latent heat of vaporization is 2160 k J/kg. Further, the steam is initially just saturated and the condensate leaves the exchanger without sub-cooling i.e. only latent heat of condensing steam is transferred to the water. Take specific heat of water as 4 k J/kg K
In a surface condenser, the water flowing through a series of tubes at the rate of 200 kg/hr is heated from 15 degree Celsius to 75 degree Celsius. The steam condenses on the outside surface of tubes at atmospheric pressure and the overall heat transfer coefficient is estimated at 860 k J/m2 hr degree. Find the number of transfer units of the heat exchanger. At the condensing pressure, stream has saturation temperature 0f 100 degree Celsius and the latent heat of vaporization is 2160 k J/kg. Further, the steam is initially just saturated and the condensate leaves the exchanger without sub-cooling i.e. only latent heat of condensing steam is transferred to water. Take specific heat of water as 4 k J/kg K
Concentrated fermentation liquid containing 20% (w/w) gluconic acid from an evaporator has a flow rate of 2000 kg/h and a temperature 90 °C. It needs to be cooled to 6 °C in a heat exchanger with cooling water. The cooling water has a flow rate 2700 kg/h and an initial temperature 2 °C. If the cooling water leaves the heat exchanger at 50 °C, what is the rate of heat loss from gluconic acid solution to the surroundings? Assume the heat capacity of gluconic acid is 0.35 cal/g-°C-1.
On what factors does the current carrying capacity of a fuse depend? I) Size of fuse wire II) Fuse material III) Surrounding of the fuse Choose the correct answer from the options given below.