Related Questions

In a spherical dome the hoop stress due to a concentrated load at crown is
A Compressive everywhere
B Tensile everywhere
C Partly compressive and partly tensile
D Zero
The hoop stress in a riveted cylindrical shell of diameter (d), thickness (t) and subjected to an internal pressure (p) is (where $$\eta $$ = Efficiency of the riveted joint)
A $$\frac{{{\text{pd}}}}{{{\text{t}}\eta }}$$
B $$\frac{{{\text{pd}}}}{{2{\text{t}}\eta }}$$
C $$\frac{{{\text{pd}}}}{{4{\text{t}}\eta }}$$
D $$\frac{{{\text{pd}}}}{{8{\text{t}}\eta }}$$
A thin cylindrical shell of diameter (d), length ($$l$$) and thickness (t) is subjected to an internal pressure (p). The hoop stress in the shell is
A $$\frac{{{\text{pd}}}}{{\text{t}}}$$
B $$\frac{{{\text{pd}}}}{{2{\text{t}}}}$$
C $$\frac{{{\text{pd}}}}{{4{\text{t}}}}$$
D $$\frac{{{\text{pd}}}}{{6{\text{t}}}}$$
A thin cylindrical shell of diameter (d), length ($$l$$) and thickness (t) is subjected to an internal pressure (p). The ratio of longitudinal strain to hoop strain is
A $$\frac{{{\text{m}} - 2}}{{2{\text{m}} - 1}}$$
B $$\frac{{2{\text{m}} - 1}}{{{\text{m}} - 2}}$$
C $$\frac{{{\text{m}} - 2}}{{2{\text{m}} + 1}}$$
D $$\frac{{2{\text{m}} + 1}}{{{\text{m}} - 2}}$$
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
একজন অ্যাথলেট পৃথিবীতে দীর্ঘ লাফ দিয়ে সর্বোচ্চ 4 m দূরত্ব যেতে পারেন। এই অ্যাথলেট চাঁদের পৃষ্ঠে দীর্ঘ লাফ দিয়ে সর্বোচ্চ কত দূর যেতে পারবেন ? [পৃথিবীর ভর ও ব্যাসার্ধ চাঁদের ভর ও ব্যাসার্ধের যথাক্রমে 81 গুণ ও 4 গুণ] (An athlete can cross a maximum distance 4 m by a long jump on earth surface. What is the maximum distance the athlete can cross by a long jump on moon's surface? [The mass and radius of earth are 81 times and 4 times of moon's mass and radius, respectively.])
A 0.79m
B 9 m
C 20.25 m
D 16 m
E 32.35 m
In a spherical dome subjected to concentrated load at crown or uniformly distributed load, the meridional force is always
A Zero
B Tensile
C Compressive
D Tensile or compressive
Heat conducted through per unit area and unit thick face per unit time when temperature difference between opposite faces is unity, is called
A Thermal resistance
B Thermal coefficient
C Temperature gradient
D Thermal conductivity
When an open coiled helical compression spring is subjected to an axial compressive load, the maximum shear stress induced in the wire is (where D = Mean diameter of the spring coil, d = Diameter of the spring wire, K = Wahl's stress factor and W = Axial compressive load on the spring)
A $$\frac{{{\text{WD}}}}{{\pi {{\text{d}}^3}}} \times {\text{K}}$$
B $$\frac{{2{\text{WD}}}}{{\pi {{\text{d}}^3}}} \times {\text{K}}$$
C $$\frac{{4{\text{WD}}}}{{\pi {{\text{d}}^3}}} \times {\text{K}}$$
D $$\frac{{8{\text{WD}}}}{{\pi {{\text{d}}^3}}} \times {\text{K}}$$
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

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