Q. Water enters a circular pipe of length L = 5.0 m and diameter D = 0.20 m with Reynolds number ReD = 500. The velocity profile at the inlet of the pipe is uniform while it is parabolic at the exit. The Reynolds number at the exit of the pipe is . Ans: 500 […]
Q. A wire of circular cross-section of diameter 1.0 mm is bent into a circular arc of radius 1.0 m by application of pure bending moments at its ends. The Young’s modulus of the material of the wire is 100 GPa. The maximum tensile stress developed in the wire is_____MPa. Ans: 49 – 51 Sol:
Q. The state of stress at a point in a component is represented by a Mohr’s circle of radius 100 MPa centered at 200 MPa on the normal stress axis. On a plane passing through the same point, the normal stress is 260 MPa. The magnitude of the shear stress on the same plane at
Q. The figure shows an idealized plane truss. If a horizontal force of 300 N is applied at point A, then the magnitude of the force produced in member CD is_____N. Ans: 0
Q. If x is the mean of data 3, x, 2 and 4, then the mode is Ans: 3 Sol: Given data are 3, x, 2, and 4
If x is the mean of data 3, x, 2 and 4, then the mode is Read More »
Q. The most common limit gage used for inspecting the hole diameter is (A) Snap gage (B) Ring gage (C) Plug gage (D) Master gage Ans: Plug gage Sol: The most common limit gauge used for inspecting the hole diameter is Plug gauge.
The most common limit gage used for inspecting the hole diameter is Read More »
Q. The cold forming process in which a hardened tool is pressed against a workpiece (when there is relative motion between the tool and the workpiece) to produce a roughened surface with a regular pattern is (A) Roll forming (B) Strip rolling (C) Knurling (D) Chamfering Ans: Knurling Sol: It is a process of
The cold forming process in which a hardened tool is pressed against a workpiece Read More »
Q. The fluidity of molten metal of cast alloys (without any addition of fluxes) increases with increase in (A) viscosity (B) surface tension (C) freezing range (D) degree of superheat Ans: degree of superheat
Q. Hardenability of steel is a measure of (A) the ability to harden when it is cold worked (B) the maximum hardness that can be obtained when it is austenitized and then quenched (C) the depth to which required hardening is obtained when it is austenitized and then quenched (D) the ability to retain its
Hardenability of steel is a measure of Read More »
Q. Which one of the following modifications of the simple ideal Rankine cycle increases the thermal efficiency and reduces the moisture content of the steam at the turbine outlet? (A) Increasing the boiler pressure. (B) Decreasing the boiler pressure. (C) Increasing the turbine inlet temperature. (D) Decreasing the condenser pressure. Ans: Increasing the turbine inlet
