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  Q & A > ICSE Board Exam : Class X Solved Question Papers Class 10 Sample / Model Papers for Download - Previous Years What was the answer of Q.5 (a) (iii) in physics exam? Asked by: rjnikhil

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  Q & A > ICSE Board Exam : Class X Solved Question Papers Class 10 Sample / Model Papers for Download - Previous Years in the jack screw question - I wrote a lot but the main gist was the formula and longer arm = less effort. Its correct right? Asked by: eeshaan17

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  Q & A > ICSE Board Exam : Class X Solved Question Papers Class 10 Sample / Model Papers for Download - Previous Years guys correctly define the word wrapper class.if possible with example? Asked by: deepakudgiri

  Q & A > ICSE Board Exam : Class X Solved Question Papers Class 10 Sample / Model Papers for Download - Previous Years SECTION 1 QUESTION 2 : d) ii. The smoke from a fire looks white. Which of the following statements are true? 1. Molecules of the smoke are bigger than the wavelength of light. 2. Molecu Asked by: you21

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  Q & A > ICSE Board Exam : Class X Solved Question Papers Class 10 Sample / Model Papers for Download - Previous Years is V = v + Emf or V = emf - v V = Terminal voltage v= voltage drop Asked by: teleansh

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  CBSE Class 10 Pre Board 2021 : Social Science (Smt Ramkuwar Devi Fomra Vivekananda Vidyalaya (SRDFVV), Chromepet, Chennai)

  The soil with the features described is Black soil, also known as Regur soil. Reasoning: 1. Found in Deccan trap region: Black soil is predominantly found in the Deccan Plateau region of India, which is known for its extensive lava flows. 2. Made up of Lava flows: Black soil is formed from the weathering of basaltic lava rocks. The Deccan Trap is a large igneous province composed of multiple layers of solidified flood basalt. Black soil is characterized by its dark color, high clay content, and excellent water retention capacity. It is highly fertile and suitable for growing crops like cotton, hence also known as "black cotton soil." mkjk

  + 1 more by mkjk  

  CBSE Class 10 Pre Board 2021 : Mathematics (Kendriya Vidyalaya (KV), Kolkata)

  To determine the values of 'k' for which the system is inconsistent, we need to find when the lines are parallel but not identical. This occurs when the slopes are equal, but the y-intercepts are different. Step 1: Rearrange both equations into slope-intercept form (y = mx + b) Equation 1: y = (-k/3)x + (k-2)/3 Equation 2: y = (-12/k)x + 1 Step 2: For the system to be inconsistent, the slopes must be equal: -k/3 = -12/k Step 3: Cross multiply: k² = 36 Step 4: Solve for k: k = ±6 Step 5: Check if the y-intercepts are different for both k = 6 and k = -6: For k = 6: Eq 1: y-intercept = (6-2)/3 = 4/3 Eq 2: y-intercept = 1 The y-intercepts are different, so k = 6 makes the system inconsistent. For k = -6: Eq 1: y-intercept = (-6-2)/3 = -8/3 Eq 2: y-intercept = 1 The y-intercepts are different, so k = -6 also makes the system inconsistent. Therefore, the system is inconsistent when k = 6 or k = -6. mkjk

  Chapter 2.1 - Fuels and Combustion

  d) low excess air Reasoning: A high percentage of carbon monoxide (CO) in the flue gas of a boiler indicates incomplete combustion, which is typically caused by insufficient air supply or low excess air. When there's not enough oxygen available for complete combustion, carbon in the fuel doesn't fully oxidize to carbon dioxide (CO2) and instead forms carbon monoxide (CO). High excess air would result in more complete combustion and lower CO levels. Complete combustion would produce primarily CO2 rather than CO. Good control of pollutants would typically aim to minimize CO production. Therefore, the presence of high CO levels points to low excess air, which leads to incomplete combustion and higher CO formation. balamurali19

  + 6 more by balamurali19  

  Chapter 2.1 - Fuels and Combustion

  d) mix of fixed carbon and ash Reasoning: When analyzing the composition of coal in a laboratory, the sample is heated in an oven to drive off volatile matter. The volatile matter includes gases and liquids that are released when coal is heated, such as methane, hydrogen, and various hydrocarbons. After this process, what remains in the oven is not just ash, but a mixture of fixed carbon and ash. Fixed carbon is the solid combustible residue that remains after the volatile matter is driven off. It consists mainly of carbon, with small amounts of hydrogen, oxygen, nitrogen, and sulfur. Ash is the non-combustible mineral matter left after complete combustion. It includes various inorganic compounds like silica, alumina, iron oxide, and others. Options a), b), and c) are incorrect because: a) Sulphur is typically present in small amounts and would not be the only remaining component. b) Moisture would have been driven off during the heating process. c) Ash alone doesn't account for the fixed carbon content, which is a significant part of coal. Therefore, the correct answer is d) mix of fixed carbon and ash, as this accurately represents the solid content remaining after the volatile matter is distilled off in coal analysis. balamurali19

  Chapter 2.1 - Fuels and Combustion

  False Reasoning: The statement is false because it contains an error in terminology. The correct term is "proximate analysis" when referring to coal analysis, not "approximate analysis." Proximate analysis is a specific method used in coal characterization that determines the distribution of products obtained when coal is heated under specified conditions. It typically includes the measurement of moisture, volatile matter, fixed carbon, and ash content. The word "proximate" in this context does have a meaningful interpretation. It refers to the analysis being a close estimation or approximation of the coal's composition, providing important information about its properties and potential use, without conducting a full elemental analysis. The term "approximate" is not typically used in this specific coal analysis context and would be considered incorrect terminology in the field of coal science and engineering. balamurali19

  Chapter 2.1 - Fuels and Combustion

  c) maximum fuel input over minimum fuel input Reasoning: The turndown ratio for burners refers to the range of fuel input that a burner can effectively handle while maintaining stable combustion. It is calculated by dividing the maximum fuel input capacity by the minimum fuel input capacity. This ratio indicates the burner's flexibility in operating at different heat outputs. A higher turndown ratio means the burner can operate efficiently over a wider range of heat demands, which is important for energy efficiency and process control in various industrial applications. balamurali19

  Chapter 2.1 - Fuels and Combustion

  False. Reasoning: The statement is incorrect. Coal actually requires a higher percentage of excess air for efficient combustion compared to natural gas. Coal is a solid fuel with a complex composition, including various impurities. It requires more excess air to ensure complete combustion of all combustible components and to overcome mass transfer limitations. Typically, coal-fired boilers operate with 15-40% excess air. Natural gas, on the other hand, is a gaseous fuel that mixes more easily with air. It has a simpler chemical composition (primarily methane) and burns more completely with less excess air. Natural gas-fired systems typically operate with 10-15% excess air. The lower excess air requirement for natural gas contributes to its higher combustion efficiency compared to coal. This is one of the reasons why natural gas is considered a cleaner-burning fuel. balamurali19

  Chapter 2.1 - Fuels and Combustion

  a) lighter oil have higher specific heat Reasoning: In fuel oils, there is an inverse relationship between specific heat and specific gravity. Lighter oils have lower specific gravity (density) and higher specific heat capacity. This is because: 1. Lighter oils have smaller, less complex molecules, which can absorb and store more thermal energy per unit mass. 2. Heavier oils have larger, more complex molecules that are already more tightly bound, leaving less capacity to absorb additional thermal energy. 3. The specific heat of a substance is related to its molecular structure and bonds. Lighter oils with simpler structures tend to have more degrees of freedom for molecular motion, resulting in higher specific heat. 4. As the molecular weight increases (heavier oils), the specific heat generally decreases. This relationship is important in understanding the heating and cooling properties of different fuel oils in various applications, such as combustion engines and heating systems. balamurali19

  Chapter 2.1 - Fuels and Combustion

  b) LSHS (Low Sulphur Heavy Stock) Reasoning: Specific gravity is a measure of the density of a substance compared to the density of water. Among the given fuel options, LSHS typically has the highest specific gravity. This is because: 1. LSHS is a heavy residual fuel oil, which means it's composed of heavier hydrocarbons. 2. Furnace oil, while also a heavy fuel, generally has a slightly lower specific gravity than LSHS. 3. LDO (Light Diesel Oil) and HSD (High-Speed Diesel) are both distillate fuels with lower densities compared to residual fuels like LSHS and furnace oil. The specific gravity of these fuels typically follows this order (from highest to lowest): LSHS > Furnace Oil > LDO > HSD Therefore, LSHS has the highest specific gravity among the given options. balamurali19

  Chapter 3.1 - Electrical Systems

  c) 36 times Reasoning: The voltage drop in a power distribution system is inversely proportional to the square of the voltage. When the voltage is increased from 11 kV to 66 kV, we can calculate the factor by which the voltage drop will decrease: (66 kV / 11 kV)² = (6)² = 36 This means that by raising the distribution voltage from 11 kV to 66 kV, the voltage drop will be reduced by a factor of 36 times. Therefore, option c) 36 times is the correct answer. ajoy_menon

  + 2 more by ajoy_menon  

  16th National Certification Exam Energy Managers & Auditors SEPTEMBER 2015 Paper 2

  b) calcium bicarbonate Reasoning: Temporary hardness in water is caused by the presence of dissolved calcium and magnesium bicarbonates. When water containing these bicarbonates is heated, they decompose to form insoluble carbonates, which precipitate out of the solution. This process can be reversed by cooling and adding carbon dioxide, hence the term "temporary" hardness. Calcium bicarbonate (Ca(HCO3)2) is the correct answer because: 1. It contains calcium, which is one of the primary ions responsible for water hardness. 2. It is a bicarbonate salt, which can be easily converted to an insoluble carbonate upon heating. 3. The hardness caused by calcium bicarbonate can be removed by boiling the water, making it temporary. The other options (calcium sulphate, calcium chloride, and calcium nitrate) cause permanent hardness in water because they do not decompose or precipitate upon heating, and their removal requires more complex methods such as ion exchange or chemical treatment. ajoy_menon

  16th National Certification Exam Energy Managers & Auditors SEPTEMBER 2015 Paper 2

  c) dilutes the flue gases Reasoning: Nitrogen plays several roles in combustion, but diluting the flue gases is one of its true functions. The correct answer is the statement that is NOT true about nitrogen's role. a) Nitrogen can produce oxides of nitrogen (NOx) at high temperatures. b) Nitrogen does reduce the volume of combustion by-products by displacing oxygen. c) This statement is false. Nitrogen actually dilutes the flue gases, not reduces dilution. d) Nitrogen does carry some heat in flue gases, though it's not as significant as other components. Therefore, option c is the incorrect statement about nitrogen's role in combustion. ajoy_menon

  ISC 12th 2019 Result Wall : Share Your Result!
  	99.75/s/1744b378d7/:J.S.S. International School (JSS IS), Dubai agastyamenon

  ICSE 2024 Results Wall - Share Your Result!
  	99.4100 in science, maths, computer, history and geography /s/05b7114697/:St. Xavier's Institution (SXI), Panihati, Kolkata meghattay

  CA IPCC : Question Paper (with Answers) - AUDITING & ASSURANCE Nov 2009

  False. The auditor should not describe the work of the expert with their name in the audit report without obtaining prior consent. This statement is incorrect for the following reasons: 1. Confidentiality: Experts often work under confidentiality agreements, and disclosing their identity without permission may breach these agreements. 2. Professional ethics: It's considered unethical to name or identify an expert without their explicit consent. 3. Potential liability: Naming an expert without permission could expose them to potential liability or unwanted scrutiny. 4. Auditing standards: Most auditing standards require auditors to obtain permission before identifying experts in their reports. 5. Focus on findings: The audit report should focus on the findings and conclusions rather than the individuals involved in the process. The correct approach is for the auditor to describe the nature of the expert's work and its impact on the audit findings without naming the expert, unless explicit permission has been obtained. harika77

  	The exact dates for the 2026 ICSE exams are not yet available. The schedule is typically released by the Council for the Indian School Certificate Examinations (CISCE) several months before the exams begin. Keep an eye on the official CISCE website for updates closer to the time. bobby31

  Chapter 1.7 - Project Management

  c. Performance monitoring Performance monitoring is the correct answer because that suggests corrective action based on actual performance. This process involves: 1. Setting performance standards 2. Measuring actual performance 3. Comparing actual performance against standards 4. Analyzing deviations 5. Taking corrective action Performance monitoring is an ongoing process that allows managers to identify issues, make adjustments, and improve overall efficiency in real-time. Unlike CUSUM (Cumulative Sum Control Chart) which is a statistical quality control tool, or PERT (Program Evaluation and Review Technique) which is used for project management, performance monitoring is specifically designed to provide feedback and suggest corrective actions based on actual performance data. saisriram

  ICSE Class X Prelims 2025 : Chemistry (St. Xavier's Institution (SXI), Panihati, Kolkata)
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