Related Questions

'Fat coals' are those coals which have very high
A Caking capacity
B Volatile matter content
C Fusion point of its ash
D Inherent moisture content
The popular notion that a tree's age can be determined by counting number of internal rings in its trunk is generally true. Howeevr, to help regulate the internal temperature of the tree, the outermost layers of wood of the Brazilian ash often →peel away when the temperature exceeds 95 degrees Fahrenheit, leaving the tree with fewer rings than it would otherwise have. So only if the temperature in the Brazilian ash's environment never exceeds 95 degrees Fahrenheit →elav eing the tree with fewer rings than it would otherwise have. So only if the reliable measure of the tree's age. Which of the following is an assumption on whish the argument above depends?
A The growth of new rings in a trees is not a function of levels of precipitation.
B Only the Brazilaian ash loses rings because of excessive heat.
C One day of temperatures above 95 degrees Fahrenheit will cause the Brazilian ash to lose one ring.
D The internal rings of all tress are of uniform thickness
For making fly-ash building bricks, the following mix of fly-ash, sand and lime, is
A 80 : 13 : 7
B 70 : 20 : 10
C 60 : 35 : 5
D None of these
Underfeed stokers work best for __________ coals high in volatile matter and with caking tendency
A Anthracite
B Lignite
C Semi-bituminous and bituminous
D All of the above
Assam coals suffers mainly from the disadvantage of high __________ content.
A Ash
B Volatile matter
C Sulphur (4-6%)
D Moisture
To carry coals to new castle- এর বাংলা কি
A ঝোপ বুঝে কোপ মারা
B কাঁচা বাঁশে ঘুন ধরা
C তেলা মাথায় তেল দেওয়া
D কয়লা ধুলে ময়লা যায় না
Carring coals to new castle - এর ঠিক অর্থ
A যার আছে তাকেই দেওয়া
B অর্থহীন সাহায্য
C বিপদের সাহায্য করা
D কয়লা খনিতে কয়লা পাঠানো
Caking coals are those which
A Form lumps or masses of coke
B Burn freely
C Show little or no fusing action
D Burn completely
Which of the following coals has the highest calorific value?
A Anthracite coal
B Bituminous coal
C Lignite
D Peat
Which of the following varieties of coals is mostly used in steam boilers?
A Non-coking bituminous coal
B Brown coal
C Peat
D None of the above

Next steps