The gross or total head of the turbine is the ___________ of the water levels at the head race and tail race.

John, Jack, Joseph and Jordan participated in a running race. Only the winner finished the race in 10 minutes. Which two pieces of information can tell you who the winner was? (i) John finished the race in 16 minutes . (ii) Joseph finished the race earlier than Jack by 2 minutes. (iii) Jack finished the race later than Jordan by 4 minutes. (iv) Jordan finished the race earlier than John by 6 minutes. (v) John finished the race later than Joseph by minutes.

A

I and II

B

I and IV

C

II and III

D

II and V

which of the following components of reaction turbine increases the head on the turbine by an amount equal to the height of runner outlet above the tail race ?

A

Scroll casing

B

Guide vanes

C

Draft tube

D

Moving vanes

If Hg is the gross or total head and hf is the head lost due to friction, then net or effective head (H) is given by

A

$${\text{H}} = \frac{{{\text{Hg}}}}{{{\text{hf}}}}$$

B

H = Hg × hf

C

H = Hg + hf

D

H = Hg - hf

A fair coin is to be tossed 100 times with each toss resulting in a head or a tail. If H is the total number of heads and T is the total number of tails, which of the following events has the greats possibility?

A

H =50

B

T> 60

C

H 95

D

H>48 and T> 48

The specific speed of a turbine is the speed of an imaginary turbine, identical with the given turbine, which

A

Delivers unit discharge under unit head

B

Delivers unit discharge under unit speed

C

Develops unit power under unit head

D

Develops unit power under unit speed

The power developed by a turbine is (where H = Head of water under which the turbine is working)

A

Directly proportional to $${{\text{H}}^{\frac{1}{2}}}$$

B

Inversely proportional to $${{\text{H}}^{\frac{1}{2}}}$$

C

Directly proportional to $${{\text{H}}^{\frac{3}{2}}}$$

D

Inversely proportional to $${{\text{H}}^{\frac{3}{2}}}$$

At XYZ Company, the ratio of sales to gross profit is 4:3 and the ratio of gross profit to net profit is 3:1, what is the ratio of net profits to sales?

A

1:4

B

4:1

C

2:1

D

1:2

At XYZ Company, the ratio sales to gross profit is 4:3 and the ratio of gross profit to net profit is 3:1, what is the ratio of net profits to sales?

A

1:4

B

4:1

C

2:1

D

1:2

Maruf's net income is always 80 percent of his gross income. What will be increase in Maruf's net income when his gross income increases from Tk. 20,000 to Tk. 30,000?

A

5,000

B

6,000

C

8,000

D

none of these

A company generated revenue of Tk. 125,000 in 2012 which was 12.5% of its gross revenue. In 2013, the gross revenue increased by Tk. 250,000. What is the percentage increase in the revenue in 2013?

A

12.5%

B

20%

C

25%

D

50%

The gross or total head of the turbine is the ___________ of the water levels at the head race and tail race.

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