Which of the following achieves the least reduction ratio for a given feed size?

On moving the feed line (q-line) from saturated liquid feed (vertical position) to saturated vapor feed (horizontal feed), if the slope of both the operating lines are to be increased, then it will result in

A

Greater degree of separation with a fixed number of trays

B

Increased reboiler load

C

Increased reflux ratio

D

None of these

Out of the following size reduction equipments, the maximum feed size can be accepted by the

A

Tube mill

B

Ball mill

C

Jaw crusher

D

Jet pulveriser

A bag of chicken feed can feed 18 chickens for 54 days. For how many days will it feed 12 chickens?

A

81

B

36

C

72

D

40

Fqra cold viscous feed, backward feed gives __________ than forward feed.

A

A higher capacity

B

A lower capacity

C

Lower economy

D

None of these

A backward feed multiple effect evaporator is better than forward feed for concentrating cold feed, because it provides

A

Higher economy

B

Lower capacity

C

Both A & B

D

Lower economy

Complete the sentence by using the most "appropriate word " as given below : "Traffic speed limits are set at a level that achieves some balance between the danger of ___ speed and the desire of most people to travel as quickly as possible "

A

Normal

B

Marginal

C

Excessive

D

prudent

When a competitive firm achieves long run equilibrium, then,

A

P=MC

B

MR=MC

C

P=ATC

D

All of the above

The Solar eclipse achieves totality only in limited geographical regions because ________

A

The trajectories of the Earth around the Sun and the Moon around the Earth are not perfect circles

B

The size of the shadow of the Moon on the Earth is small compared to the cross-section of the Earth

C

Sun rays can reach most of the peripheral regions of the shadow of the moon due to atmospheric refraction

D

The Earth is not a smooth flat surface, but has elevations and depressions

Arrange the following size reduction equipment in the decreasing order of the average particle size produced by each of them.

A

Jaw crusher, Ball mill, Fluid energy mill

B

Ball mill, Jaw crusher, Fluid energy mill

C

Fluid energy mill, Jaw crusher, Ball mill

D

Fluid energy mill, Ball mill, Jaw crusher

A reduction of 15% in the price of a shirt resulted in the reduction of the price of the shirt by Tk 21. What was the previous price of the shirt?

A

Tk. 175

B

Tk. 140

C

Tk. 150

D

Tk. 120

Which of the following achieves the least reduction ratio for a given feed size?

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