Aircraft body is usually fabricated by_________________?

Related Mcqs:

1. In the case of an elastic bar fixed at upper end and loaded by a falling weight at lower end, the shock load produced can be decreased by_________________?

   A. decreasing the cross-section area of’ bar
   B. increasing the cross-section area of bar
   C. remain unaffected with cross-section area
   D. would depend upon other factors
   E. none of the above

2. The valve rod in a steam engine is connected to an eccentric rod by_________________?

   A. cotter joint
   B. bolted joint
   C. kunckle joint
   D. universal coupling
   E. gib and cotter joint

3. The strap end of a connecting rod of steam engine is joined by_________________?

   A. gib of cotter joint
   B. sleeve and cotter joint
   C. spigot socket cotter joint
   D. knuckle joint
   E. universal coupling

4. Taper usually provided on cotter is_________________?

   A. 1 in 5
   B. 1 in 10
   C. 1 in 24
   D. 1 in 40
   E. 1 in 50

5. The edges of the plates for cylindrical vessels are usually bevelled to an angle of 80° for_________________?

   A. reducing stress concentration
   B. ease of manufacture
   C. safety
   D. fullering and caulking
   E. all of the above

6. The piston rod of a steam engine is usually connected to the cross head by means of__________________?

   A. bolted joint
   B. kunckle joint
   C. cotter joint
   D. universal joint
   E. universal coupling

7. Buttress threads are usually found on____________________?

   A. screw cutting lathes
   B. feed mechanisms
   C. spindles of bench vices
   D. screw jack
   E. railway carriage couplings

8. If an unsupported uniform cross sectional elastic bar is subjected to a longitudinal impact from a rigid bob moving with velocity v, then a compressive wave of intensity sc is propagated through the bar as follows______________________?

   A. vpE
   B. vVvF
   C. WpE/2
   D. IvHpE
   E. none of the above, where E = modulus of elasticity and p = mass density

9. Which process will increase the fatigue duration of parts ?

   A. finishing and polishing
   B. shot-peening
   C. decarburisation
   D. electroplating
   E. all of the above”.

10. In order to obtain bolt of uniform strength____________________?

    A. increase shank diameter
    B. increase its length
    C. drill an axial hole through head up to threaded portion so that shank area is equal to root area of thread
    D. tighten die bolt properly
    E. all of the above