An upper limit of oil content is limited to about __________ percent for achieving efficient and satisfactory level of wax sweating.

Solvent deoiling process is used for separating oil and soft wax from hard wax. Methyl iso-butyl ketone and methyl ethyl ketone (MEK) are two commonly used deoiling solvents. Use of former as the deoiling solvent has the advantages of the

A

Elimination of solvent drying facility

B

Higher nitration temperature

C

Lower solvent dilution ratio

D

All of the above

After the increase of price of oil by 40%, a family decided to reduce its oil consumption so that the expenditure for oil goes up by 26% only. If the total consumption of oil before the price rise was 10 kg per month, then what is the current consumption of oil per month (in kg)?

A

8

B

8.50

C

9

D

None of these

Water content in the crude oil as it comes out of oil well may be upto __________ percent.

A

2

B

5

C

10

D

25

A high vapour velocity is required for high plate efficiency in a seive plate coloumn. The satisfactory value of operating vapor velocity for design purpose in seive plate column is about __________ percent of the flooding velocity.

A

45

B

60

C

80

D

95

Deoiling is the process of removal of oil from wax. It is done by the __________ process.

A

Solvent extraction

B

Sweating

C

Resettling

D

All of the above

The difference between the upper limit and lower limit of a dimension is called

A

Nominal size

B

Basic size

C

Actual size

D

Tolerance

আজ পরীক্ষা দিতে আসার সময় তোমার কোনো এক বন্ধুর খুব টেনশন হচ্ছিল। টেনশনে তার হাত-পা ঘামছিল, গলা শুকিয়ে যাচ্ছিল, হৃৎস্পন্দন বেড়ে যাচ্ছিল। এমতাবস্থায়, তার কোন স্নায়ুতন্ত্র কার্যকর ছিল? (One of your friends was in serious tension while coming for exam today. He was sweating, having dry mouth, and his heart beat was accelerated. Which nervous system was in action at that time?)

A

ঐচ্ছিক (Somatic)

B

কেন্দ্রীয় (Central)

C

সমবেদী (Sympathetic)

D

পরাসমবেদী (Parasympathetic)

The compound used in prickly heat powder to prevent excessive sweating is

A

Boric acid

B

Phosphoric acid

C

Carbonic acid

D

Sulphuric acid

Sweating is important

A

For improvement of normal health

B

To open the pore of skin

C

To control the temperature of body

D

To excret the smell of body

On Dhaka- Sylet highway , 5% of the drives are fined for exceeding the speed limit. However , 80% of the drivers who exceed the speed limit are not fined. What percentage of dirvers on this highway exceed the speed limit?

A

10

B

15

C

20

D

25

An upper limit of oil content is limited to about __________ percent for achieving efficient and satisfactory level of wax sweating.

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