How many microns are there in a metre?

If T and R are the tread and rise of a stair which carries a load w per square metre on slope, the corresponding load per square metre of the horizontal area, is

A

$$\frac{{{\text{w}}\left( {{\text{R}} + {\text{T}}} \right)}}{{\text{T}}}$$

B

$$\frac{{{\text{w}}\sqrt {{{\text{R}}^2} + {{\text{T}}^2}} }}{{\text{T}}}$$

C

$$\frac{{{\text{w}}\sqrt {{\text{R}} + {\text{T}}} }}{{\text{T}}}$$

D

$${\text{w}}\frac{{\text{R}}}{{\text{T}}}$$

If a 240-metre-long metro rail passes a pole in 24 seconds, how long will it take to pass a 650-metre-long platform?

A

60 seconds

B

75 seconds

C

89 seconds

D

130 seconds

Brownian movement is prominent in the particle size range of __________ microns in case of settling of a particle in a fluid.

A

2 to 3

B

0.01 to 0.10

C

200 to 300

D

100 to 1000

Electro-magnetic spectrum range, which is important for radiation varies from __________ microns.

A

1 to 100

B

0.5 to 50

C

10 to 100

D

100 to 1000

The range of electromagnetic spectrum important in heat transfer by radiation is __________ microns.

A

0.38-0.78

B

0.5-50

C

100-1000

D

5-50

Particle size range in which dust catcher (gravity settling chamber) works most effectively and efficiently is __________ microns.

A

[

A.

B. 10 to 25

B

> 1000

Alphatron measures pressure __________ microns.

A

[

A.

B.

B

> 3

In three coloured boxes - Red, Green and Blue, 108 balls are placed. There are twice as many balls in the green and red boxes combined as there are in the blue box and twice as many in the blue box as there are in the red box. How many balls are there in the green box ?

A

18

B

36

C

45

D

None of these

How many seconds will a 500 metre long train take to cross a man walking with a speed of 3km/hr in the direction of the moving train if the speed of the train is 63km/hr?

A

25

B

30

C

40

D

45

Some birds settled on the branches of a tree. First, they sat one to a branch and there was one bird too many. Next they sat two to a branch and there was one branch too many. How many branches were there?

A

3

B

4

C

5

D

6

E

2

How many microns are there in a metre?

Related Questions