Fuel economy in furnaces can be achieved by

Thickness of stock does not affect the fuel economy of furnaces, if the material to be heated is of

A

Low emissivity

B

High thermal conductivity

C

Both A and B

D

Neither A nor B

Pulverised fuel fired furnaces employ __________ fuel firing.

A

Horizontal

B

Vertical

C

Tangential

D

All of the above

Fuel economy in an industrial furnace operation can not be achieved by the use of

A

Stoichiometric combustion air

B

Non-preheated combustion air

C

Combustion air not enriched with oxygen

D

Recupterators

Travelling at a constant speed of 32 miles per hours, a certain motorboat consumers 24gallons of fuel per hour. What is the fuel consumption of his boat this speed measured in miles per gallons of fuel?

A

2/3

B

3/4

C

4/5

D

4/3

A certain truck uses 18 gallons of diesel fuel in traveling 270 miles. In order for the truck to travel the same distance using 10 gallons of diesel fuel, by how many miles per gallon must the truck's fuel mileage be increased.

A

12

B

15

C

27

D

9

Two tanks are filled to capacity with automobile fuel. The first tank holds 600 gallons more than the second tank. If 100 gallons were to be pumped from each tank, the first tank would then contain 3 times as much fuel as the second tank. What is the total number of gallons of fuel in the two full tanks?

A

1,400

B

1,200

C

1,000

D

900

Due to the recession, a show room reported that revenue from luxury car sales were down by 11% and revenue from economy car sales were up by 7% . If the total revenue were up by 1% then what is the ratio of revenue from luxury car sales to revenue from economy car sales ?

A

3 :2

B

11:7

C

4:5

D

1:2

Mixed economy means an economy where

A

Both agriculture and industry are equally promoted by the state

B

There is co-existence of public sector along with private sector

C

There is importance of small scale industries along with heavy industries

D

Economy is controlled by military as well as civilian rulers

By the use of which of the following, high frequency power supply for induction furnaces can be obtained?

A

Coreless transformers

B

Current transformers

C

Motor-generator set

D

Multiphase transformer

Thermal efficiency of furnaces can be improved by

A

Waste heat recovery from flue gas

B

Minimising heat losses from furnace walls

C

Maintaining proper draught

D

All of the above

Fuel economy in furnaces can be achieved by

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