It is a measure of the resistance that a body’s mass and distribution of its mass about the axis of rotation. This property is known as
The specific gravity of the substance is the ratio of the density of the substance to the density of water. Another term for specific gravity is:
A solid steel shaft is not to twist through more than 3 degrees in a 6 m length when subjected to a torque of 12 kN.m. What maximum shearing stress is developed? Use G=83GPa
A certain support stand design to carry downward loads. Compute the stress in the square shaft at the upper part of the stand for a load of 27,000 lb. The line of action of the applied of the applied load is centered on the axis on the shaft, and the load is applied through a thick plate that distributes the force to the entire cross section of the stand.
The hardness of steel may be increased by heating to approximatelyv1500°F and quenching in oil or water if
A leak from a faucet comes out in separate drops. Which of the following is the main cause of this phenomenon
It is the ability of a material to be elongated
A process of welding metals in molten or in vaporous state without application of mechanical pressure or blow. Such welding may be accomplished by the oxyacetylene or by hydrogen flame or by electric arc. It is called:
It is a measure of pulling and pushing force
The ratio of the uniform triaxial stresses, to the change in volume at equal stress in all directions is:
The property of the body which measures its resistance to changes in motion.
A steel bar 50 mm in diameter and 2 m long is surrounded by a shell of cast iron 5 mm thick. Compute the load that will compress the combined bar a total of 0.8 mm in the length of 2m. For steel E = 200 GPa, and for cast iron E = 100 GPa
Determine the elongation in a helical steel spring composed of 20 turns of 20 mm-diamter wire on a mean radius of 80 mm when tha spring is supporting a load of 2 kN. Use G = 83 GPa
A cylinder pressure vessel is fabricated from plates which have a thickness of 20mm. The diameter of the pressure vessel is 450 mm and its length is 3.5m. Determine the maximum internal pressure which can be applied if the stress in the steel is limited to 150MPa.
The reciprocal of bulk modulus of any fluid is called
It is the value of stress on the stress-strain curve at which the material has deformed plastically; that is, it will no longer return to its original size and shape after removing the load
Ivory soap floats in water because
A brittle material is one that fails suddenly under load with little or no plastic deformation. A metal that exhibits a percent elongation ____ 5.0% is considered to be brittle
It is the measure of the resistance to twisting.
It is the measure of the total resistance to sliding