Atmospheric pressure exerted on earth is due to ________

A compressor that takes suction at a pressure below atmospheric and discharge against atmospheric pressure is called a __________ pump.

A

Sump

B

Volute

C

Vacuum

D

Submerged

To have pressure wholly compressive under the base of a retaining wall of width b, the resultant of the weight of the wall and the pressure exerted by the retained, earth should have eccentricity not more than

A

$$\frac{{\text{b}}}{3}$$

B

$$\frac{{\text{b}}}{4}$$

C

$$\frac{{\text{b}}}{5}$$

D

$$\frac{{\text{b}}}{6}$$

The latent heat of steam at pressures greater than atmospheric in comparison to latent heat at atmospheric pressure is

A

Less

B

More

C

Equal

D

May be less or more depending on temperature

Total pressure on the vertical face of a retaining wall of height ‘h’ per unit run exerted by the retained earth weighing ‘w’ per unit volume, is

A

$${\text{wh}}\frac{{\left( {1 - \sin \varphi } \right)}}{{\left( {1 + \sin \varphi } \right)}}$$

B

$${\text{w}}{{\text{h}}^2}\frac{{\left( {1 - \sin \varphi } \right)}}{{\left( {1 + \sin \varphi } \right)}}$$

C

$$\frac{{{\text{w}}{{\text{h}}^2}\left( {1 - \sin \varphi } \right)}}{{2\left( {1 + \sin \varphi } \right)}}$$

D

$$\frac{{{\text{w}}{{\text{h}}^2}\left( {1 - \sin \varphi } \right)}}{{3\left( {1 + \sin \varphi } \right)}}$$

In the earth's atmosphere, the atmospheric pressure ________

A

Increases with height

B

Decreases with height

C

Remains constant with height

D

First increases and then decreases with height

Gauge pressure at a point is equal to the absolute pressure __________ the atmospheric pressure.

A

Plus

B

Minus

C

Divide

D

Multiply

Blood pressure is the pressure exerted on the wall of

A

Heart

B

Vein

C

Artery

D

Cell

The partial pressure of each constituent present in an alloy is __________ the total vapor pressure exerted by the alloy.

A

Less than

B

Equal to

C

More than

D

Either B or C; depends on the type of alloy

পৃথিবী পৃষ্ঠে একটি ইটের ওজন 81 N. পৃথিবীর অর্ধেক বাসার্ধের সমান উচ্চতায় এবং অর্ধেক বাসার্ধের সমান গভীরতায় ইউটির উপরে পৃথিবীর অভিকর্ষ বলের মান কত হবে?(A brick weighs 81 N on the surface of the earth. What are the earth's gravitational forces act on it at a height of half of the radius of the earth and at a depth of half of the radius of earth, respectively?)

A

36 N and 81 N

B

36 N and 40.5 N

C

36 N and 20.25 N

D

98 and 40.5 N

E

81 N and 81 N

The pressure of air at the beginning of the compression stroke is ________ the atmospheric pressure.

A

Equal to

B

Less than

C

More than

D

None of these

Atmospheric pressure exerted on earth is due to ________

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