Which of the following device is best suited for measuring the temperature inside metallurgical furnaces?

Which of the following methods is used to control temperature in resistance furnaces?

A

Variation of resistance

B

Variation of voltage

C

Periodical switching on and off of the supply

D

All of the above methods

Maximum heat transfer in high temperature furnaces is by

A

Conduction

B

Convection

C

Radiation

D

Either A, B or C; depends on the type of furnace

Which of the following represents examples of an IT input device, output device and storage device respectively ?

A

bar code reader, CD drive, projector

B

keyboard, monitor, hard disc

C

printer, DVD drive, joystick

D

printer, mouse, monitor

A man wishes to cover his floor with tiles, each one measuring 3/4 inch by 2 inches. If his room is rectangular, measuring 12 feet by 18 feet, how many such tiles will he need?

A

144

B

1152

C

1728

D

20736

The water in a fish tank measuring 114 feet by 8 inches is 7 inches high. The water is poured into another tank measuring 14 inches by 20 inches. What will be the height of water, in inches, in the second tank?

A

1/4

B

2

C

3

D

1/12

Which of the following is the common pollutant emitted from metallurgical smelters, thermal power plant and cement plants?

A

NO_x

B

Hg

C

SO₂

D

F

The metallurgical process in which a metal is obtained in a fused state is called

A

smelting

B

roasting

C

calcinations

D

froth floatation

The fuel mostly used in cement industry and in metallurgical processes is

A

wood charcoal

B

bituminous cock

C

pulverized coal

D

coke

Volatile matter content of metallurgical coke may be around __________ percent.

A

1-2

B

10-15

C

22-26

D

30-33

Quantity of coke produced from metallurgical coal may be around __________ percent.

A

30

B

50

C

75

D

95

Which of the following device is best suited for measuring the temperature inside metallurgical furnaces?

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