Top 150+ Solved Design of Machine Elements MCQ Questions Answer
Q. Among casting, forging and forging which has the slowest rate of production?
a. casting
b. forging
c. machining
d. all have equal rate of production
Q. Why tolerances are given to the parts?
a. because it’s impossible to make perfect settings
b. to reduce weight of the component
c. to reduce cost of the assembly
d. to reduce amount of material used
Q. What is bilateral tolerance?
a. total tolerance is in 1 direction only
b. total tolerance is in both the directions
c. may or may not be in one direction
d. tolerance provided all over the component body
Q. What is mean clearance?
a. maximum size of hole minus maximum size of shaft
b. minimum size of hole minus minimum size of shaft
c. mean size of hole minus mean size of shaft
d. average of both size of shaft and hole
Q. Which of the following is incorrect about tolerances?
a. too loose tolerance results in less cost
b. tolerance is a compromise between accuracy and ability
c. too tight tolerance may result in excessive cost
d. fit between mating components is decided by functional requirements
Q. Quality control charts doesn’t depend on which factor?
a. normal distribution
b. random sampling
c. independence between samples
d. binomial distribution
Q. If a clearance fit is present between shaft and hole, what is the tolerance on shaft or hole for a complete interchangeable approach?
a. ½ of maximum clearance – ½ of minimum clearance
b. ¼ of maximum clearance – ¼ of minimum clearance
c. maximum clearance – minimum clearance
d. ¾ of maximum clearance – ¾ of minimum clearance
Q. A beam is said to be of uniform strength, if
a. b.m. is same throughout the beam
b. shear stress is the same through the beam
c. deflection is the same throughout the beam
d. bending stress is the same at every section along its longitudinal axis
Q. Stress in a beam due to simple bending is
a. directly proportional
b. inversely proportional
c. curvilinearly related
d. none of the mentioned
Q. Which stress comes when there is an eccentric load applied?
a. shear stress
b. bending stress
c. tensile stress
d. thermal stress
Q. On bending of a beam, which is the layer which is neither elongated nor shortened?
a. axis of load
b. neutral axis
c. center of gravity
d. none of the mentioned
Q. The bending stress is
a. directly proportional to the distance of layer from the neutral layer
b. inversely proportional to the distance of layer from the neutral layer
c. directly proportional to the neutral layer
d. does not depend on the distance of layer from the neutral layer
Q. Consider a 250mmx15mmx10mm steel bar which is free to expand is heated from 15C to 40C. what will be developed?
a. compressive stress
b. tensile stress
c. shear stress
d. no stress