481. Ball bearing type screws are found in following application_____________________?
A. screw jack
B. aeroplane engines
C. crane
D. steering mechanism
E. bench vice

482. The function of a washer is to___________________?
A. provide cushioning effect
B. provide bearing area
C. absorb shocks and vibrations
D. provide smooth surface in place of rough surface
E. act as a locking device

483. For applications involving high stresses in one direction only the following type of thread would be best suited______________________?
A. ISO metric thread
B. acme thread
C. square thread
D. buttress thread
E. British Association thread

484. Shear stress theory is applicable for____________________?
A. ductile fnaterials
B. brittle materials
C. elastic materials
D. all of the above
E. none of the above

485. The following type of nut is used with alien bolt____________________?
A. alien nut
B. hexagonal nut
C. slotted nut
D. castle nut
E. any one of the above

486. If d is the diameter of bolt hole then for a flanged pipe joint to be leak proof, the circumferential pitch of the bolts should be_________________?
A. lOVZ
B. 10VZtol5Vd
C. 15Vdto20VZ
D. 20Vdto30Vd
E. 30V5″to40Vd

487. A bolt___________________?
A. has a head on one end and a nut fitted to the other
B. has head at one end and other end fits into a tapped hole in the other part to be joined
C. has both the ends threaded
D. is provided with pointed threads
E. requires no nut

488. The endurance limit in shear of carbon steel can be obtained by multiplying the endurance limit in flexure by a factor of____________?
A. 0.25
B. 0.45
C. 0.55
D. 0.65
E. 0.75

489. Which is correct statement ?
A. a member made of steel will generally be more rigid than a member of equal load-carrying ability made of cast iron
B. a member made of cast iron will generally be. more rigid than a member of equal load carrying ability made of steel
C. both will be equally rigid
D. which one is rigid will depend on several other factors
E. none of the above

490. A self locking screw has________________>
A. fine threads
B. coarse threads
C. coefficient of friction > tangent of load angle
D. hole for inserting split pin
E. two nuts for locking

NOTE
IF YOU THINK ANY OF THE MCQ ABOVE IS WRONG.
PLEASE COMMENT WITH CORRECT ANSWER AND ITS DETAIL EXPLANATION IN COMMENT BOX.
THANK YOU

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