Lessing ring is formed by the addition of a partition across the centre of a raschig ring, which results in an area increase of about __________ percent.

Sphericity of raschig ring (whose length and diameter are equal) is

A

>1

B

1

C

2

Raschig ring made of procelain cannot be used for treating concentrated

A

Hydrochloric acid

B

Nitric acid

C

Alkalis

D

Sulphuric acid

Maximum size of the raschig rings used in a packed tower is about __________ of the coloumn diameter.

A

$${\frac{1}{{10}}^{{\text{th}}}}$$

B

$${\frac{1}{{20}}^{{\text{th}}}}$$

C

$${\frac{1}{{30}}^{{\text{th}}}}$$

D

$${\frac{1}{{50}}^{{\text{th}}}}$$

Diameter of raschig rings used in packed tower in industry is normally around __________ inches.

A

2

B

8

C

12

D

18

Use of raschig rings in place of crushed stones as packing in packed beds (other things being same)

A

Increases pressure drop, increases surface area

B

Increases pressure drop, decreases surface area

C

Decreases pressure drop, increases surface area

D

Decreases pressure drop, decreases surface area

For raschig rings, the sphericity is

A

0.5

B

1

C

$$\sqrt 3 $$

For you to create a swap partition by using fdisk, what must the partition's system ID type be?

A

83

B

82

C

5

D

4

E

None of the above

A department store receives a shipment of 1,000 shirts, for which it pays $9,000. The store sells the shirts at a price 80 percent above cost for one month, after which it reduces the price of the shirts to 20 percent above cost. The store sells 75 percent of the shirts during the first month and 50 percent of the remaining shirts afterward. How much gross income did sales of the shirts generate?

A

Tk. 10800

B

Tk 12150

C

Tk 13500

D

Tk 14800

In the Excel Manufacturing Company, 46 percent of the employees are men. If 60 percent of the employees are unionized and 70 percent of these are men, what percent of the non-unionized workers are women?

A

90%

B

87.5%

C

66.7%

D

50%

In a class of 200 students , 40 percent are girls . 25 percent of the boys and 10 percent of the girls signed up for a tour to Cox's bazar . What percent of the class signed up for the tour?

A

19%

B

23%

C

25%

D

27%

Lessing ring is formed by the addition of a partition across the centre of a raschig ring, which results in an area increase of about __________ percent.

Related Questions