০০। A bar of copper and steel form a composite system, which is heated to a temperature of 40°C. The stress induced in the copper bar will be
ক) tensile
খ) compressive
গ) shear
ঘ) zero
০১। A bar of length L metres extends by l mm under a tensile force of P. The strain produced in the bar is
ক) l/L
খ) 0.1 l/L
গ) 0.01 l/L
ঘ) 0.001 l/L
০২। A beam encastered at both the ends is called
ক) simply supported beam
খ) fixed beam
গ) cantilever beam
ঘ) continuous beam
০৩। A beam extending beyond the supports is called
ক) simply supported beam
খ) fixed beam
গ) overhanging beam
ঘ) cantilever beam
০৪। A beam of T-section is subjected to a shear force of F. The maximum shear force will occur at the
ক) top of the section
খ) bottom of the section
গ) neutral axis of the section
ঘ) junction of web and flange
০৫। A beam of triangular section is placed with its base horizontal. The maximum shear stress occurs at
ক) apex of the triangle
খ) mid of the height
গ) centre of gravity of the triangle
ঘ) base of the triangle
০৬। A beam of uniform strength has
ক) same cross-section throughout the beam
খ) same bending stress at every section
গ) same bending moment at every section
ঘ) same shear stress at every section
০৭। A beam of uniform strength may be obtained by
ক) keeping the width uniform and varying the depth
খ) keeping the depth uniform and varying the width
গ) varying the width and depth both
ঘ) any one of the above
০৮। A beam supported at its both ends is not a simply supported beam.
ক) True
খ) False
০৯। A beam supported on more than two supports is called
ক) simply supported beam
খ) fixed beam
গ) overhanging beam
ঘ) continuous beam
১০। A beam which is fixed at one end and free at the other is called
ক) simply supported beam
খ) fixed beam
গ) overhanging beam
ঘ) cantilever beam
১১। A body is subjected to a direct tensile stress (σ) in one plane. The shear stress is maximum at a section inclined at __________ to the normal of the section.
ক) 45° and 90°
খ) 45° and 135°
গ) 60° and 150°
ঘ) 30° and 135°
১২। A body is subjected to a direct tensile stress of 300 MPa in one plane accompanied by a simple shear stress of 200 MPa. The maximum normal stress will be
ক) -100 MPa
খ) 250 MPa
গ) 300 MPa
ঘ) 400 MPa
১৩। A body is subjected to a direct tensile stress of 300 MPa in one plane accompanied by a simple shear stress of 200 MPa. The maximum shear stress will be
ক) -100 MPa
খ) 250 MPa
গ) 300 MPa
ঘ) 400 MPa
১৪। A body is subjected to a direct tensile stress of 300 MPa in one plane accompanied by a simple shear stress of 200 MPa. The minimum normal stress will be
ক) -100 MPa
খ) 250 MPa
গ) 300 MPa
ঘ) 400 MPa
১৫। A body is subjected to a tensile stress of 1200 MPa on one plane and another tensile stress of 600 MPa on a plane at right angles to the former. It is also subjected to a shear stress of 400 MPa on the same planes. The maximum normal stress will be
ক) 400 MPa
খ) 500 MPa
গ) 900 MPa
ঘ) 1400 MPa
১৬। A body is subjected to a tensile stress of 1200 MPa on one plane and another tensile stress of 600 MPa on a plane at right angles to the former. It is also subjected to a shear stress of 400 MPa on the same planes. The maximum shear stress will be
ক) 400 MPa
খ) 500 MPa
গ) 900 MPa
ঘ) 1400 MPa
১৭। A body is subjected to a tensile stress of 1200 MPa on one plane and another tensile stress of 600 MPa on a plane at right angles to the former. It is also subjected to a shear stress of 400 MPa on the same planes. The minimum normal stress will be
ক) 400 MPa
খ) 500 MPa
গ) 900 MPa
ঘ) 1400 MPa
১৮। A body is subjected to two normal stresses 20 kN/m2 (tensile) and 10 kN/m2 (compressive) acting perpendicular to each other. The maximum shear stress is
ক) 5 kN/m2
খ) 10 kN/m2
গ) 15 kN/m2
ঘ) 20 kN/m2
১৯। A bolt is made to pass through a tube and both of them are tightly fitted with the help of washers and nuts. If the nut is tightened, then
ক) bolt arid tube are under tension
খ) bolt and tube are under compression
গ) bolt is under compression and tube is under tension
ঘ) bolt is Under tension and tube is under compression