Related Questions

The ultimate tensile stress of mild steel compared to ultimate compressive stress is
A Same
B More
C Less
D Unpredictable
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 change in length due to a tensile or compressive force acting on a body is given by (where P = Tensile or compressive force acting on the body, $$l$$ = Original length of the body, A = Cross-sectional area of the body and E = Young's modulus for the material of the body)
A $$\frac{{{\text{P}}l{\text{A}}}}{{\text{E}}}$$
B $$\frac{{{\text{P}}l}}{{{\text{AE}}}}$$
C $$\frac{{\text{E}}}{{{\text{P}}l{\text{A}}}}$$
D $$\frac{{{\text{AE}}}}{{{\text{P}}l}}$$
For steel, the ultimate strength in shear as compared to ultimate strength in tension is
A $$\frac{1}{2}$$
B $$\frac{1}{3}$$
C $$\frac{1}{4}$$
D $$\frac{2}{3}$$
The compressive strength of cast iron is __________ that of its tensile strength.
A Equal to
B Less than
C More than
D None of these
The tensile strength of ductile materials is _________ its compressive strength.
A Equal to
B Less than
C Greater than
D None of these
ভঙ্গুর পদার্থের compressive strength, tensile strength হতে -
A বেশি
B কম
C সমান
D দ্বিগুণ
A survey was conducted among the students of Khulna University to find out how many forms of physical exercise usually swam, 25% said they usually did jogging, 20% said they played cricket, 15% said they usually played football and 20 respondents said they did not take any form of exercise. From the above findings it can be concluded that.
A The student of khulna University do not usually take physical exercise.
B No respondent took more than one form of exercise.
C The method of data collection was not valid.
D Some of the respondents took more than one form of exercise.
The steel used in steel cored conductors is usually
A Alloy steel
B Stainless steel
C Mild steel
D High speed steel
Stainless steel is usually made by alloying the steel with
A Copper and nickel
B Copper and chromium
C Chromium and nickel
D Manganese and copper

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