__________ present in coal is not determined in its ultimate analysis.

Ultimate analysis of coal determines its __________ content.

A

Carbon, hydrogen, nitrogen & sulphur

B

Carbon, ash, sulphur & nitrogen

C

Carbon, sulphur, volatile matter & ash

D

Carbon, volatile matter, ash & moisture

Calorific value of coal middling generated in coal washeries during washing of coal may be around __________ Kcal/kg.

A

1000

B

4000

C

6000

D

8000

The ultimate analysis of coal consists of the determination of the percentage of

A

Carbon

B

Hydrogen and nitrogen

C

Sulphur and ash

D

All of these

The ultimate tensile stress for mild steel is __________ the ultimate compressive stress.

A

Equal to

B

Less than

C

More than

D

None of these

The ultimate strength in tension for steel is __________ times the ultimate strength in shear.

A

0.5

B

0.9

C

1.5

D

2.5

The ratio of % total carbon obtained in the ultimate analysis of coke and % fixed carbon obtained in the proximate analysis is always

A

1

B

> 1

C

Unpredictable

For steel, the ultimate strength in shear as compared to ultimate strength in tension is

A

$$\frac{1}{2}$$

B

$$\frac{1}{3}$$

C

$$\frac{1}{4}$$

D

$$\frac{2}{3}$$

The ultimate tensile stress of mild steel compared to ultimate compressive stress is

A

Same

B

More

C

Less

D

Unpredictable

Proximate analysis of coal determines its __________ content.

A

moisture, ash, sulphur & volatile matter

B

moisture, volatile matter, ash & fixed carbon

C

moisture, sulphur, nitrogen & fixed carbon

D

none of the mentioned

Coal is heated in presence of air to a temperature of about __________ °C, while determining its ash content for proximate analysis.

A

500

B

750

C

950

D

1100

__________ present in coal is not determined in its ultimate analysis.

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