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This section includes 12 Mcqs, each offering curated multiple-choice questions to sharpen your Applied Chemistry knowledge and support exam preparation. Choose a topic below to get started.
1. |
CO=40%, H2=12%, CO2=6%, CH2=2%, N2=50% are the components in the coal. What will be the composition of the dry flue gas, if the 50% excess air was used for burning 100m3 of gas? |
A. | CO2=14.9%, N2=80%, O2=5.2% |
B. | CO2=12.2%, N2=70.8%, O2=6.5% |
C. | CO2=14.9%, N2=79.9%, O2=5.2% |
D. | CO2=13%, N2=77%, O2=75 |
Answer» D. CO2=13%, N2=77%, O2=75 | |
2. |
The coal sample contains=80%; H=4%; O=2%; N=12%; S=2%, the remainder is ash and then calculate the volume of air required for perfect combustion of 1kg of fuel assuming STP conditions. |
A. | weight of oxygen required=10.65kg; volume of the oxygen=8725l |
B. | weight of oxygen required=11.25kg; volume of the oxygen=8500l |
C. | weight of oxygen required=11.25; volume of the oxygen=8200l |
D. | weight of oxygen required=10.65kg; volume of the oxygen=8166.6l |
Answer» E. | |
3. |
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. |
A. | HCV=7155.55cal/g; NCV=6894.55cal/g |
B. | HCV=6894.55cal/g; NCV=7155.55cal/g |
C. | HCV=7171.2cal/g; NCV=6889.2cal/g |
D. | HCV=6889.2cal/g; NCV=7171.2cal/g |
Answer» B. HCV=6894.55cal/g; NCV=7155.55cal/g | |
4. |
Calculate the HCV and NCV of the coal for the following data.Weight of the coal=0.8gWater equivalent of calorimeter=460gWeight of the water=2600gRise in temperature=2.42oCCooling corrections=0.052oCFuse wire corrections=10 caloriesH=6% and assume latent heat of steam=600cal/g. |
A. | 9131.4cal/g |
B. | 9113.6cal/g |
C. | 9800cal/g |
D. | 9220cal/g |
Answer» B. 9113.6cal/g | |
5. |
Calculate the GCV and NCV of a fuel from the following data. Volume of the fuel burnt at STP is 0.08m2.Weight of the water used for cooling is 24kg.Temperature of inlet and outlet water is 25oC. and 30oC respectively. Weight of water obtained by steam condensation is 0.02kg. |
A. | 1234.50cal/g |
B. | 1353.25cal/g |
C. | 1225.50cl/g |
D. | 1335.25cal/g |
Answer» C. 1225.50cl/g | |
6. |
Which of the following is not the constitute of CNG? |
A. | ethane |
B. | propane |
C. | isobutane |
D. | CO |
Answer» D. CO | |
7. |
Which of the following releases less amount of carbon dioxide per unit of energy? |
A. | Coal |
B. | Oil |
C. | LPG |
D. | Petrol |
Answer» C. LPG | |
8. |
CO=40%, H2=12%, CO2=6%, CH2=2%, N2=50% are the components in the coal. What will be the composition of the dry flue gas, if the 50% excess air was used for burning 100m3 of gas? |
A. | CO<sub>2</sub>=14.9%,N<sub>2</sub>=80%,O<sub>2</sub>=5.2% |
B. | CO<sub>2</sub>=12.2%,N<sub>2</sub>=70.8%,O<sub>2</sub>=6.5% |
C. | CO<sub>2</sub>=14.9%,N<sub>2</sub>=79.9%,O<sub>2</sub>=5.2% |
D. | CO<sub>2</sub>=13%,N<sub>2</sub>=77%,O<sub>2</sub>=75 |
Answer» D. CO<sub>2</sub>=13%,N<sub>2</sub>=77%,O<sub>2</sub>=75 | |
9. |
The coal sample contains=80%;H=4%;O=2%;N=12%;S=2%, the remainder is ash and then calculate the volume of air required for perfect combustion of 1kg of fuel assuming STP conditions. |
A. | weight of oxygen required=10.65kg;volume of the oxygen=8725l |
B. | weight of oxygen required=11.25kg;volume of the oxygen=8500l |
C. | weight of oxygen required=11.25;volume of the oxygen=8200l |
D. | weight of oxygen required=10.65kg;volume of the oxygen=8166.6l |
Answer» E. | |
10. |
Calculate the weight and volume of air required for the complete combustion of 2kg of carbon. |
A. | weight of air=5000g;volume of the air=17000l |
B. | weight of air=17000g;volume of the air=15000l |
C. | weight of air=5330g;volume of the air=17766.66l |
D. | weight of air=8220g;volume of the air=1555.45l |
Answer» D. weight of air=8220g;volume of the air=1555.45l | |
11. |
A sample of coal containing the following elements: |
A. | |
B. | HCV=7155.55cal/g; NCV=6894.55cal/g |
C. | HCV=6894.55cal/g: NCV=7155.55cal/g |
Answer» B. HCV=7155.55cal/g; NCV=6894.55cal/g | |
12. |
Calculate the GCV and NCV of a fuel from the following data. Volume of the fuel burnt at STP is 0.08m2.Weight of the water used for cooling is 24kg.Temperature of inlet and outlet water is 25oC. and 30oC respectively. Weight of water obtained by steam condensation is 0.02kg. |
A. | 1234.50cal/g |
B. | 1353.25cal/g |
C. | 1225.50cl/g |
D. | 1335.25cal/g |
Answer» C. 1225.50cl/g | |