Latest Machine Design Questions and Answers for Competitive Exams
31. A screw is specified by
(A) Major diameter
(B) Minor diameter
(C) Pitch diameter
(D) Pitch
32. The washer is generally specified by its
(A) Outer diameter
(B) Hole diameter
(C) Thickness
(D) Mean diameter
33. The maximum shear stress theory is used for
(A) Brittle materials
(B) Ductile materials
(C) Plastic materials
(D) Non ferrous materials
34. The maximum normal stress theory is used for
(A) Brittle materials
(B) Ductile materials
(C) Plastic materials
(D) Non ferrous materials
35. The design of shafts made of brittle materials is based on
(A) Guest’s theory
(B) Ramkine’s theory
(C) St. Venant’s theory
(D) Von mises theory
36. Which of the following screw thread is adopted for power transmission in either direction?
(A) Acme Threads
(B) Square threads
(C) Butters threads
(D) Multiple threads
37. A brake commonly used in railway trains is
(A) Shoe brake
(B) Bond brake
(C) Bond & block brake
(D) Internal expending brake
38. A brake commonly used in motor cars is
(A) Shoe brake
(B) Bond brake
(C) Bond & block brake
(D) Internal expending brake
39. The cylinders are usually made of
(A) Cast iron or cast steel
(B) Aluminium
(C) Stainless steel
(D) Copper
40. The size of gears is usually specified by
(A) Pressure angle
(B) Pitch circle diameter
(C) Circular pitch
(D) Diametric pitch
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