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কাগজের ভার হিসাবে ব্যবহৃত একটি পুরু কাচ (প্রতিসরাঙ্ক 1.5) খন্ডের উপর থেকে খাড়া নীচের দিকে তাকালে কাগজের উপর একটি দাগ কাচের উপর প্রান্ত থেকে 6 cm নীচে দেখা যায়। কাচ খন্ডতির পুরুত্ব কত? (When you look downward from the top of a thick glass (refractive index 1.5) slab used as a paper weight, a mark on the paper is seen 6 cm below from the top of the slab. What is the thickness of the glass slab?)
A 4 cm
B 6 cm
C 9 cm
D 12 cm
কাগজের ভার হিসাবে ব্যবহৃত একটি পুরু কাচ (প্রতিসরাঙ্ক 1.5) খণ্ডের উপর থেকে খাড়া নীচের দিকে তাকালে কাগজের উপর একটি দাগ কাচের উপর প্রান্ত থেকে 6 cm নীচে দেখা যায়। কাচ খন্ডটির পুরুত্ব কত? (When you look downward from the top of a thick glass (refractive index 1.5) slab used as a paper weight, a mark on the paper is seen 6 cm below from the top of the slab. What is the thickness of the glass slab?)
A 4 cm
B 6 cm
C 9 cm
D 12 cm
The breadth of a ribbed slab containing two bars must be between
A 6 cm to 7.5 cm
B 8 cm to 10 cm
C 10 cm to 12 cm
D 12 cm to 15 cm
A ribbed slab is provided for
A A plain ceiling
B Thermal insulation
C Acoustic insulation
D All the above
The thickness of the topping of a ribbed slab, varies between
A 3 cm to 5 cm
B 5 cm to 8 cm
C 8 cm to 10 cm
D 12 cm to 15 cm
For a ribbed slab
A Clear spacing between ribs shall not be greater than 4.5 cm
B Width of the rib shall not be less than 7.5 cm
C Overall depth of the slab shall not exceed four times the breadth of the rib
D All the above
When a bar of length '$$l$$' and diameter 'd' is rigidly fixed at the upper end and hanging freely, then the total elongation produced in the bar due to its own weight is (where w = Weight per unit volume of the bar)
A $$\frac{{{\text{w}}l}}{{2{\text{E}}}}$$
B $$\frac{{{\text{w}}{l^2}}}{{2{\text{E}}}}$$
C $$\frac{{{\text{w}}{l^3}}}{{2{\text{E}}}}$$
D $$\frac{{{\text{w}}{l^4}}}{{2{\text{E}}}}$$
If ‘W’ is the load on a circular slab of radius ‘R’, the maximum radial moment at the centre of the slab, is
A $$\frac{{{\text{W}}{{\text{R}}^2}}}{{16}}$$
B $$\frac{{2{\text{W}}{{\text{R}}^2}}}{{16}}$$
C $$\frac{{3{\text{W}}{{\text{R}}^2}}}{{16}}$$
D $$\frac{{5{\text{W}}{{\text{R}}^2}}}{{16}}$$
If W is the load on a circular slab of radius R, the maximum circumferential moment at the centre of the slab, is
A $$\frac{{{\text{W}}{{\text{R}}^2}}}{{16}}$$
B $$\frac{{2{\text{W}}{{\text{R}}^2}}}{{16}}$$
C $$\frac{{3{\text{W}}{{\text{R}}^2}}}{{16}}$$
D Zero
If the maximum bending moment of a simply supported slab is M Kg.cm, the effective depth of the slab is (where Q is M.R. factor)
A $$\frac{{\text{M}}}{{100{\text{Q}}}}$$
B $$\frac{{\text{M}}}{{10\sqrt {\text{Q}} }}$$
C $$\sqrt {\frac{{\text{M}}}{{\text{Q}}}} $$
D $$\sqrt {\frac{{\text{M}}}{{100{\text{Q}}}}} $$

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