The losses occurring in a D.C. generator are given below. Which loss is likely to have highest proportion at rated load of the generator?

A company paid tk.500000 in merit raises to employees whose performances were rated A, B, or C. Each employee rated A received twice the amount of the rated C.each employee rated B received 150% of the amount of the raise thst was paid to each employee rated C. if 50 workers were rated A,100rated B and 150 were rated C, how much was the raise paid to each employee rated B?

A

Tk. 740

B

Tk. 1250

C

Tk. 1875

D

Tk. 2500

If all the factors of productions are increased in a fixed proportion , volume of production increase proportion which is greater than the proportion of increase in the factors of production -this state can be described most appropriately by -

A

Proportionate return to scale

B

Disproportionate return of scale

C

Increasing return to scale

D

Law of scale

It all the factors of productions are increased in a fixed proportion, volume of production increase proportion which is greater than the proportion of increase in the factors of production this state can be described most appropriately by-

A

Proportionate return to scale

B

Disproportionate return of scale

C

Increasing return to scale

D

Law of scale

In a separately excited generator supplying rated load the armature reaction:

A

Is always present

B

Is always absent

C

May be sometimes present

D

None of the above

A and B started a partnership business investing some in the ratio of 3:5 , C joined them after six months with an amount equal to that of B. In what proportion joined them after six months with an amount equal that of B. In what proportion should the profit at the and of the first year distributed among A. B and C

A

3:5:2

B

3:5:5

C

6:10:5

D

cannot be determined

The ages of X and Y are in the proportion of 6:5 and total of their ages is 44 years. The proportion of their ages after 8 years will be

A

8:7

B

3 : 6

C

6 : 3

D

9 : 5

When the axis of load lies in the plane of rivet group, then the most heavily loaded rivet will be the one which (where, Fa is the load shared by each rivet due to axial load and Fm is the shearing load due to moment in any rivet.)

A

Is at the maximum distance from CG of the rivet group

B

Is at the minimum distance from CG of the rivet group

C

Gives the maximum angle between the two forces Fa and Fm

D

Gives the minimum angle between the two forces Fa and Fm

In testing a pile by load test, pile platform is loaded with one and half times the design load and a maximum settlement is noted. The load is gradually removed and the consequent rebound is measured. For a safe pile, the net settlement (i.e. total settlement minus rebound) per tonne of test load should not exceed

A

10 mm

B

15 mm

C

20 mm

D

25 mm

Which of the following steps is likely to result in reduction of hysteresis loss in a D.C. generator?

A

Providing laminations in armature core

B

Providing laminations in stator

C

Using nonmagnetic material for frame

D

Using material of low hysteresis coefficient for armature core material

Which of the following load normally needs starting torque more than the rated torque?

A

Blowers

B

Conveyors

C

Air compressors

D

Centrifugal pumps

The losses occurring in a D.C. generator are given below. Which loss is likely to have highest proportion at rated load of the generator?

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