Related Questions

A ladder is resting against a vertical wall and its bottom is 2.5 m away from the wall. If it slips 0.8 m down the wall, then its bottom will move away from the wall by 1.4 m. What is the length of the ladder?
A 6.2 m
B 6.5 m
C 6.8 m
D \7.5 m
In case of a 'thin' pressure vessel, the ratio of its diameter to wall thickness is
A [

A.

B. > 10

B > 20
C 30
A pressure vessel is said to be made of 'thick' shell, if the ratio of its diameter to wall thickness is
A 10
B 10
C 20
D 20
A pressure vessel is said to be a thick shell, if the ratio of wall thickness to its diameter is
A Equal to $$\frac{1}{{10}}$$
B Less than $$\frac{1}{{10}}$$
C Greater than $$\frac{1}{{10}}$$
D None of these
The correct relationship among displacement thickness d, momentum thickness m and energy thickness e is
A d > m > e
B d > e > m
C e > m > d
D e > d > m
If the height of the hydraulic gradient line above the floor of thickness t is h and the specific gravity of the material of the floor is G, the minimum thickness t of the floor downstream of the crest-wall, is given by the equation
A $${\text{t}} = \frac{{{\text{h}} + 1}}{{{\text{G}} + {\text{t}}}}$$
B $${\text{t}} = \frac{{{\text{h}} - 1}}{{{\text{G}} + {\text{t}}}}$$
C $${\text{t}} = \frac{{{\text{h}} - 1}}{{{\text{G}} - {\text{t}}}}$$
D $${\text{t}} = \frac{{{\text{h}} + 1}}{{\text{G}}}$$
Generally, no corrosion allowance in wall thickness of a part is required, if the thickness is more than __________ mm.
A 10
B 20
C 30
D 5
The slenderness effect of a wall is considered if the effective height of the wall exceeds the thickness
A 8 times
B 10 times
C 12 times
D 16 times
A painter has painted one-third of a rectangular wall which is ten feet high. When he will paint another 75 square feet of that wall, he will have finished three-quarters of the job. What is the length (the horizontal dimension) of the wall?
A 18 feet
B 12 feet
C 10 feet
D 9 feet
A painter has painted 1/3 of a rectangular wall that is 12 feet high. When he will paint another 50 square feet of the wall he will have finished 50% of the job. What is the length of the wall?
A 25
B 50
C 15
D 20

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