Top 150+ Solved Design of Machine Elements MCQ Questions Answer
Q. The diameter of the hub of the flywheel is usually taken
a. equal to the diameter of the shaft
b. twice the diameter of the shaft
c. three times the diameter of the shaft
d. four times the diameter of the shaft
Q. The gears on camshaft and crankshaft are known as
a. lining gears
b. aligning gears
c. timing gears
d. tuning gears
Q. The material known as high carbon high copper chrome silicon cast steel is used for making
a. camshaft
b. cylinder body
c. cylinder head
d. piston
Q. The main reasons for crankshaft wear are
a. different loads at some points of rotation
b. centrifugal forces due to crankshaft rotation
c. misalignment in connecting rod
d. all of the mentioned
Q. The main causes of crankshaft vibration are
a. variation in torque
b. cyclic variation of gas and combustion products
c. unbalanced weight of parts
d. all of the mentioned
Q. In the cam, the distance between the base circle and the nose is called
a. lift
b. lobe
c. flank
d. pitch
Q. The crankshaft rotates the camshaft using
a. belt drive
b. chain drive
c. gear drive
d. motor drive
Q. The crankshaft should be inspected for
a. cracks
b. alignment of crankpins and journals
c. cleanliness of oil gallaries
d. all of the mentioned
Q. A curved beam with eccentricity 0.02D is loaded with 1kN.Centroidal radius=4D and inner and outer radii are 3.5D and 4.5D respectively. Area of cross section is 0.8D². Find the dimension D if allowable stress is 110N/mm² and considering only direct tensile stress.
a. 4.7mm
b. 6.8mm
c. 13.95mm
d. 3.4mm
Q. Maximum shear stress in transverse fillet weld of leg h and length l is
a. p/hl
b. 1.21p/hl
c. p/1.21hl
d. none of the listed
Q. Which process allows controlling grain structure of the product?
a. casting
b. forging
c. none of the mentioned
d. die casting
Q. In forging, metal is in which of the following stage?
a. elastic
b. plastic
c. can be in any stage
d. rigid