As compared to higher pH values, the contact period required for efficient chlorination at lower pH values is

Pharmacists recently conducted a study with respect to the reasons their customers purchased eye drops to soothe eye dryness. Dry eyes were more frequently experienced by customers who wore contact lenses than by custorners who did not wear contact lenses. The pharmacists concluded that wearing contact lenses, by itself, can cause contact wearers to have dry eyes.

A

An inherited condition can cause both weak eyesight and dry eyes

B

Physical exertion causes dry eyes in many people who wear contact lenses.

C

Most people who have dry eyes do not wear contact lenses.

D

Most people who wear contact lenses do not have dry eyes.

The rolling contact bearings as compared to sliding contact bearings have

A

Low starting and low running friction except at very high speeds

B

Accuracy of shaft alignment

C

Small overall dimensions

D

All of the above

If h₁ = inner film co-efficient and /h₂ = outer film co-efficient, then the overall heat transfer co-efficient is

A

Always less than h₁

B

Always between h₁ and h₂

C

Always higher than h₂

D

Dependent on metal resistance

The film co-efficient is decreased due to the presence of non-condensing gases in the vapors. The film co-efficient of superheated vapor as compared to that of saturated vapor is

A

More

B

Less

C

Some

D

Either more or less ; depends on the nature of vapor

At a college football game, 4/5 of the seats in the lower deck of the stadium were sold. If one-fourth of all the seating in the stadium is located in the lower deck, and if 2/3 of all the seats in the stadium were sold, what fraction of the unsold seats in the stadium were in the lower deck?

A

3/20

B

1/6

C

1/3

D

7/15

At a college football game, 4/5 of the seats in the lower deck of the stadium were sold. If one-fourth of all the seats in the stadium were located in the lower deck, and if 2/3 of all the seats in the stadium were sold, what fraction of the unsold seats in the stadium were in the lower deck?

A

3/20

B

1/6

C

1/3

D

7/15

At a collegae football game, 4/5 of the seats in the lower deck of the stadium were sold. If one-forth of all the seating in the stadium is located in the lower deck and if 2/3 of all the seats in the stadium were sold. What fraction of the unsold seats in the stadium were in the lower deck?

A

3/20

B

1/6

C

1/3

D

7/15

For a two stage compressor, if index of compression for higher stage is greater than index of compression for lower stage, then the optimum pressure as compared to ideal case will

A

Increase

B

Decrease

C

Remain unaffected

D

Other factors control it

In chlorination, with the rise in temperature of water, death rate of bacteria

A

Increases

B

Decreases

C

Remains unaffected

D

None of the above

Which of the following chemical compounds can be used for de-chlorination of water?

A

Carbon dioxide

B

Bleaching powder

C

Sulphur dioxide

D

Chloramines

As compared to higher pH values, the contact period required for efficient chlorination at lower pH values is

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