Friction factor for fully developed turbulent flow through roughtough pipe depends on...reynold no / relative roughness / or both?
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Ans plz..7.5..average shear stress
Stress factor and wall stress factor are same...?
In case of turbulent flow through horizontal isothermal cylinder of diameter D ,free convection heat transfer coefficient for cylinder will
Answer explanation
- Vary as D^3/4
- Independent of diameter
- D^1/4
- D^1/2
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Point one will be rrversible or not
In MIG welding, the metal is transferred into the form of which one of the following? a. A fine spray of metal b. Molten drops c. Weld pool d. Molecules
Which of the following effects are possible
due to residual stresses in welding?
1. Reduce dimensional stability
2. Weld cracking
3. Effect on fatigue strength
4. Reduction in the creep strength V
Select the correct answer using the code
given below
a. 1 and 2 only
b. 2 and 3 only
c. 1 and 3 only
d. 1, 2, 3 and 4
Which of the following are the mach
inability criteria?
1. Tool life
2. Cutting forces
3. Surface finish
Select the correct answer using the code
given below
a. 1, 2 and 3
b. 1 and 2 only
c. 1 and 3 only
d. 2 and 3 only
hydrogen welding, hydrogen act as?
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