Machine Design MCQ Questions & Answers | Mechanical Engineering

A. There are four rivets per pitch length, all in double shear

B. There are four rivets per pitch length, out of which two are in single shear and two are in double shear

C. There are five rivets per pitch length, all in double shear

D. There are five rivets per pitch length, out of which four are in double shear and one is in single shear

A. The stress concentration in static loading is more serious in ductile materials and less serious in brittle materials

B. The stress concentration in static loading is more serious in brittle materials and less serious in ductile materials

C. The toughness of a material increases when it is heated

D. The shear stress in a beam varies from zero at the neutral surface and maximum at the outer fibres

A. The cold rolled shafting is stronger than hot rolled shafting

B. The hot rolled shafting is stronger than cold rolled shafting

C. The cold rolled and hot rolled shafting are equally strong

D. The shafts are not made by rolling process

A. The distance from a point on one thread to the corresponding point on the next thread is called pitch

B. The distance which a screw thread advances axially in one rotation of the nut is called lead

C. In single start threads, lead is equal to pitch

D. All of the above

A. A parallel sunk key is a taperless key

B. A parallel sunk key may be rectangular or square in cross-section

C. A flat saddle key is a taper key which fits in a key way of the hub and is flat on the shaft

D. All of the above

A. Spur gearing

B. Helical gearing

C. Bevel gearing

D. Spiral gearing

A. 2,000 - 3,000 kg/m²

B. 3,000 - 4,000 kg/cm²

C. 4,000 - 4,500 kg/cm²

D. 7,500 - 10,000 kg/cm²

A. $${\text{pd}}{\sigma _{\text{t}}}$$

B. $${\text{pt}}{\sigma _{\text{t}}}$$

C. $$\left( {{\text{p}} - {\text{d}}} \right){\sigma _{\text{t}}}$$

D. $$\left( {{\text{p}} - {\text{d}}} \right){\text{t}}{\sigma _{\text{t}}}$$

A. $$3{{\text{P}}_{\text{c}}}$$

B. $${{\text{P}}_{\text{c}}}$$

C. $$\frac{{{{\text{P}}_{\text{c}}}}}{3}$$

D. $$2{{\text{P}}_{\text{c}}}$$

A. Elastic strength

B. Yield strength

C. Brinell hardness number

D. Toughness