Related Questions

In leaf springs, the maximum bending stress developed in the plates is (where W = Load acting on the spring, $$l$$ = Span of the spring, n = Number of plates, b = Width of plates and t = Thickness of plates)
A $$\frac{{{\text{W}}l}}{{{\text{nb}}{{\text{t}}^2}}}$$
B $$\frac{{3{\text{W}}l}}{{2{\text{nb}}{{\text{t}}^2}}}$$
C $$\frac{{2{\text{W}}l}}{{{\text{nb}}{{\text{t}}^2}}}$$
D $$\frac{{3{\text{W}}l}}{{{\text{nb}}{{\text{t}}^2}}}$$
The allowable tensile stress in structural mild steel plates for steel tank is assumed as
A 95.0 MPa on net area
B 105.5 MPa on net area
C 105.5 MPa on gross area
D 150.0 MPa on gross area
The frictional torque transmitted in a flat pivot bearing, considering uniform wear, is (where μ = Coefficient of friction, W = Load over the bearing and R = Radius of bearing surface)
A $$\frac{1}{2}$$μWR
B $$\frac{2}{3}$$μWR
C $$\frac{3}{4}$$μWR
D μWR
The cutting speed for drilling aluminium, brass and bronze with carbon steel drills is _________ cutting speed for drilling mild steel with high speed steel drills.
A Equal to
B Less than
C More than
D None of these
When the bearing is subjected to large fluctuations of load and heavy impacts, the bearing characteristic number should be _________ the bearing modulus.
A 10 times
B 5 times
C 15 times
D 20 times
If p = bearing pressure on projected bearing area, Z = absolute viscosity of lubricant and N = speed of journal, then the bearing characteristic number is given by
A $$\frac{{{\text{ZN}}}}{{\text{p}}}$$
B $$\frac{{\text{p}}}{{{\text{ZN}}}}$$
C $$\frac{{\text{Z}}}{{{\text{pN}}}}$$
D $$\frac{{\text{N}}}{{{\text{Zp}}}}$$
For machining a mild steel workpiece by a high speed steel tool, the average cutting speed is
A 5 m/min
B 10 m/ min
C 15 m/min
D 30 m/min
The average cutting speed for turning mild steel with a high speed steel tool is
A 15 to 19 m/min
B 25 to 31 m/min
C 60 to 90 m/min
D 90 to 120 m/min
Mild steel is a/an __________ steel.
A Low carbon
B Medium carbon
C High carbon
D High alloy
The welding process used in joining mild steel shanks to high speed drills, is
A Spot welding
B Seam welding
C Flash butt welding
D Upset butt welding

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