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Engineering Chemistry Ii
Tough Engineering Chemistry
Apart from Boy’s calorimeter, which process can be used for finding the calorific value of gases?
a) Bomb calorimeter
b) Heat balance calorimeter
c) Junker’s calorimeter
d) Heat flow calorimeter
How many burners are used in Boy’s calorimeter for finding the calorific value for gases and volatile liquid?
The water condensed from the products of combustion is collected and settles in the Boy’s bomb itself.
What is the use of insulating baffles in Boy’s thermometer?
a) To deflect the gas upwards so that it can pass through the holes of the calorimeter
b) To make the gas stable in copper tube
c) To decrease the rate of heating
d) To decrease the temperature of cold water which is obtained from inlet
What is the basic formula for calculating GCV in Boy’s calorimeter?
a) GCV = w(t2+t1)/V
b) GCV = w(t2-t1)/V
c) GCV = V(t2+t1)/w
d) GCV = V(t2-t1)/w
What is the main source of error in conducting the experiment of Boy’s calorimeter?
a) The temperature of gas is greater than the room temperature
b) Due to presence of moisture
c) The mass of the gas is comparatively low
d) Due to the rise in ambient temperature
What is the basic formula for calculating NCV in Boy’s Calorimeter?
a) NCV = GCV – (m/V)×587
b) NCV = GCV – (V/m)×587
c) NCV = GCV + (m/V)×587
d) NCV = GCV + (V/m)×587
Determine the gross calorific value (GCV) of a gas, having following results after using Boy’s calorimeter: Volume of the gaseous fuel burnt = 0.mweight of the water used for cooling = 30.5 kg, Weight of the steam condensed =gm, Temperature of inlet water = 26.1and Temperature of outlet water = 36.5 0C?
a) 3100 Kcal/m3
b) 3310 cal/gm
c) 3410 Kcal/m3
d) 3780 Kcal/gm
Determine net calorific value of a volatile liquid fuel, having following results after using Boy’s calorimeter: Volume of the liquid fuel burnt = 0.mweight of the water used for cooling = 48.5 kg, Weight of the steam condensed =gm, Temperature of inlet water = 35.2and Temperature of outlet water = 42.6 0C?
a) 2361.184 Kcal/m3
b) 2013.348 Kcal/m3
c) 2256.95 Kcal/m3
d) 2185.679 Kcal/m3
Junker’s calorimeter cannot be used for measuring the calorific value of volatile liquid fuel.
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