DESIGN OF STEEL STRUCTURE QUIZ

Actual flame temperature is always lower than the adiabatic flame temperature, because there is

Neither A nor B

Always loss of heat from the flame

No possibility of obtaining complete combustion at high temperature

Both A & B

TRUE ANSWER : ?
YOUR ANSWER : ?

Stack heat losses can be minimised by

Oxygen enrichment of combustion air

Using low c.v. fuels

Maintaining proper draft in the furnace

Controlling the excess air

TRUE ANSWER : ?
YOUR ANSWER : ?

Tar yield in the low temperature and high temperature carbonisation of dry coal may be respectively __________ percent.

10 & 20

10 & 3

3 & 10

15 & 8

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following coal gasification processes will produce gas having maximum methane content?

Kopper-Totzek process

Winkler process

All of these

Lurgi process

TRUE ANSWER : ?
YOUR ANSWER : ?

Emission of dense white smoke out of the chimney of a thermal power plant is an indication of the use of

Too much air for combustion

Pulverised coal in boilers

Correct amount of air for combustion

Less air for combustion

TRUE ANSWER : ?
YOUR ANSWER : ?

Percentage of carbon monoxide in blast furnace gas may be around

8

52

14

22

TRUE ANSWER : ?
YOUR ANSWER : ?

Hardgrove grindability index of four coal samples are given below. Which of them is the easiest to grind?

70

85

100

50

TRUE ANSWER : ?
YOUR ANSWER : ?

Combustion reaction of fuels is a/an __________ reaction.

None of these

Exothermic

Endothermic

Auto catalytic

TRUE ANSWER : ?
YOUR ANSWER : ?

Ratio of primary air to secondary air increases with increase in the rank of coal, because the

High rank coals have higher amount of volatile matter

Calorific value of the coal increases

Oxygen content progressively decreases

Ratio of fixed carbon to volatile matter increases

TRUE ANSWER : ?
YOUR ANSWER : ?

Micum Index of a coke is a measure of its

Hardness & strength

Porosity

Bulk density

Reactivity

TRUE ANSWER : ?
YOUR ANSWER : ?