Machine Design - Study Mode

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[#211] Which of the following statement is correct?

Correct Answer

(B) The stress concentration in static loading is more serious in brittle materials and less serious in ductile materials
(E) The cold rolled shafting is stronger than hot rolled shafting
(L) All of the above
(P) All of the above

[#212] When two non-intersecting and non-coplanar shafts are connected by gears, the arrangement is known as

(A) Spur gearing

(B) Helical gearing

(C) Bevel gearing

(D) Spiral gearing

Correct Answer

(D) Spiral gearing

[#213] The permissible stress for carbon steel under static loading is generally taken as

(A) 2,000 - 3,000 kg/m 2

(B) 3,000 - 4,000 kg/cm 2

(C) 4,000 - 4,500 kg/cm 2

(D) 7,500 - 10,000 kg/cm 2

Correct Answer

[#214] The strength of the unriveted plate (P) per pitch length is equal to

(A) $${ ext{pd}}{sigma _{ ext{t}}}$$

(B) $${ ext{pt}}{sigma _{ ext{t}}}$$

(C) $$left( {{ ext{p}} - { ext{d}}} ight){sigma _{ ext{t}}}$$

(D) $$left( {{ ext{p}} - { ext{d}}} ight){ ext{t}}{sigma _{ ext{t}}}$$

Correct Answer

(B) $${ ext{pt}}{sigma _{ ext{t}}}$$

[#215] The condition for maximum power transmission is that the maximum tension in the flat belt should be equal to (Where, $${{ ext{P}}_{ ext{c}}}$$ = tension in belt due to centrifugal force)

(A) $$3{{ ext{P}}_{ ext{c}}}$$

(B) $${{ ext{P}}_{ ext{c}}}$$

(C) $$frac{{{{ ext{P}}_{ ext{c}}}}}{3}$$

(D) $$2{{ ext{P}}_{ ext{c}}}$$

Correct Answer

(A) $$3{{ ext{P}}_{ ext{c}}}$$