Job Solution - টেকনিক্যাল - Page 6 - Prothom Sir

1.

The pressure exerted by

The sewage when running full from inside, is called internal pressure

The internal pressure if any, causes tensile stress in the pipe material

Pressure sewers are designed to be safe in tension

all the above

The sewage when running full from inside, is called internal pressure

The internal pressure if any, causes tensile stress in the pipe material

Pressure sewers are designed to be safe in tension

all the above

2.

Which of the following pumps is used to pump sewage solids with liquid sewage without clogging the pump is?

Centrifugal pump

Pneumatic ejector

Reciprocating pump

None of these

Centrifugal pump

Pneumatic ejector

Reciprocating pump

None of these

3.

Hydraulic mean radius is

Mean radius of sewer

Difference in heads between two points in circular pipes

Mean of radii in a pipe line of varying cross-sections

Cross-sectional area/wetted perimeter

Mean radius of sewer

Difference in heads between two points in circular pipes

Mean of radii in a pipe line of varying cross-sections

Cross-sectional area/wetted perimeter

4.

The load stress of a section can be reduced by

Decreasing the lever arm

Increasing the total perimeter of bars

Replacing larger bars by greater number of small bars

Replacing smaller bars by greater number of greater bars

Decreasing the lever arm

Increasing the total perimeter of bars

Replacing larger bars by greater number of small bars

Replacing smaller bars by greater number of greater bars

5.

Pick up the correct statement from the following:

Lateral reinforcement in R.C.C. columns is provided to prevent the longitudinal reinforcement from buckling

Lateral reinforcement prevents the shearing of concrete on diagonal plane

Lateral reinforcement stops breaking away of concrete cover, due to buckling

all the above

Lateral reinforcement in R.C.C. columns is provided to prevent the longitudinal reinforcement from buckling

Lateral reinforcement prevents the shearing of concrete on diagonal plane

Lateral reinforcement stops breaking away of concrete cover, due to buckling

all the above

6.

Minimum spacing between horizontal parallel reinforcement of the same size should not be less than

One diameter

2.5 diameters

3 diameters

3.5 diameters

One diameter

2.5 diameters

3 diameters

3.5 diameters

7.

Columns may be made of plain concrete if their unsupported lengths do not exceed their least lateral dimension

Two times

three times

Four times

Five times

Two times

three times

Four times

Five times

8.

A pre-stressed concrete member is preferred because

Its dimensions are not decided from the diagonal tensile stress

Large size of long beams carrying large shear force need not be adopted

Removal of cracks in the members due to shrinkage

all the above

Its dimensions are not decided from the diagonal tensile stress

Large size of long beams carrying large shear force need not be adopted

Removal of cracks in the members due to shrinkage

all the above

9.

A pile of length carrying a uniformly distributed load per metre length is suspended at two points, the maximum, B.M. at the centre of the pile or at the points of suspension, is

WL/8

W L^{2} / 24

W L^{2} / 47

W L^{2} / 16

WL/8

W L^{2} / 24

W L^{2} / 47

W L^{2} / 16

10.

Steel bars are generally connected together to get greater length than the standard length by providing

Straight bar splice

Hooked splice

Dowel splice

all the above

Straight bar splice

Hooked splice

Dowel splice

all the above

11.

The self-weight of the footing, is

Not considered for calculating the upward pressure on footing

Also considered for calculating the upward pressure on footing

Not considered for calculating the area of the footing

Both B. and C.

Not considered for calculating the upward pressure on footing

Also considered for calculating the upward pressure on footing

Not considered for calculating the area of the footing

Both B. and C.

12.

Side face reinforcement shall be provided in the beam when depth of the web in a beam exceeds

50 cm

75 cm

100 cm

120 cm

50 cm

75 cm

100 cm

120 cm

13.

Center of percussion is

the point of C.G.

the point of metacentre

the point of application of the resultant of all the forces tending to cause a body to rotate about a certain axis

point of suspension

the point in a body about which it can rotate horizontally and oscillate under the influence of gravity.

the point of C.G.

the point of metacentre

the point of application of the resultant of all the forces tending to cause a body to rotate about a certain axis

point of suspension

the point in a body about which it can rotate horizontally and oscillate under the influence of gravity.

14.

An R.C.C. column is treated as short column if its slenderness ratio is less than

৩০

৩৫

40

50

৩০

৩৫

40

50

15.

The size of a transformer core will depend on

Frequency

area of the core

flux density of the core material

(a) and (b) both

Frequency

area of the core

flux density of the core material

(a) and (b) both

16.

Short circuit test on transformers is conducted to determine

hysteresis losses

copper losses

core losses

eddy current losses

hysteresis losses

copper losses

core losses

eddy current losses

17.

A current of 16 amperes divides between two branches in parallel of resistances 8 ohms and 12 ohms respectively The current in each branch is

6.4 A, 6.9 A

6.4 A, 9.6 A

4.6 A. 6.9 A

4.6 A, 9.6 A

6.4 A, 6.9 A

6.4 A, 9.6 A

4.6 A. 6.9 A

4.6 A, 9.6 A

18.

Ohm's law is not applicable to

Vacuum Tubes

carbon resistors

high voltage circuits

circuits with low current densities

Vacuum Tubes

carbon resistors

high voltage circuits

circuits with low current densities

19.

The filament of an electric bulb is made of

Carbon

Aluminium

Tungsten

nickel

Carbon

Aluminium

Tungsten

nickel

20.

Which of the following statement is true?

A galvanometer with low resistance in parallel is a voltmeter

A galvanometer with high resistance in parallel is a voltmeter

A galvanometer with low resistance in series is an ammeter

A galvanometer with high resistance in series is an ammeter

A galvanometer with low resistance in parallel is a voltmeter

A galvanometer with high resistance in parallel is a voltmeter

A galvanometer with low resistance in series is an ammeter

A galvanometer with high resistance in series is an ammeter