Machine Design Part 1

Attempt Free Machine Design Part 1 Here. Read The Important Mechanical MCQ From Below.

Q1. Brittle coating technique is used for
A. determining brittleness
B. protecting metal against corrosion
C. protecting metal against wear and tear
D. experimental stress analysis
E. non-destructive testing of metals.

Answer : D

Q2. A connecting rod is designed as a.
A. long column
B. short column
C. strut
D. all of these

Answer : C

Machine Design Part 1

Q3. Tapered roller bearings can take.
A. radial load only
B. axial load only
C. both radial and axial loads and the ratio of these being less than unity
D. both radial and axial loads and the ratio of these being greater than unity

Answer : D

Q4. Stress concentration is caused due to
A. variation in properties of material from point to point in a member
B. pitting at points or areas at which loads on a member are applied
C. abrupt change of section
D. all of the above
E. none of the above.

Answer : D

Machine Design Part 1

Q5. The maximum shear stress theory is used for
A. brittle materials
B. ductile materials
C. plastic materials
D. non-ferrous materials

Answer : B

Q6. The lower deviation is the algebraic difference between the.
A. minimum limit and the basic size
B. maximum limit and the basic size
C. actual size and the corresponding basic size
D. none of the above

Answer : A

Machine Design Part 1

Q7. The endurance limit of a material with finished surface in comparison to rough surface is
A. more
B. less
C. same
D. more or less depending on quantum of load
E. unpredictable.

Answer : A

Q8. The ratio of endurance limit in shear to the endurance limit in flexure is.
A. 0.25
B. 0.40
C. 0.55
D. 0.70

Answer : C

Machine Design Part 1

Q9. The metal suitable for bearings subjected to heavy loads is.
A. silicon bronze
B. white metal
C. monel metal
D. phosphor bronze

Answer : B

Q10. Plastic flow in ductile materials
A. increases the seriousness of static loading stress concentration
B. lessens the seriousness of static loading stress concentration
C. has no effect on it
D. depends on other considerations
E. none of the above.

Answer : B

Q11. A single strap butt joint is always in __________ shear.
A. single
B. double
C. Both (a) and (b)
D. none of these

Answer : A

Machine Design Part 1

Q12. When bevel gears having equal teeth and equal pitch angles connect two shafts whose axes intersect at right angle, then they are known as.
A. angular bevel gears
B. crown bevel gears
C. internal bevel gears
D. mitre gears

Answer : D

Q13. The maximum stress due to stress concentration in a bar having circular transverse hole, as compared to its static stress without hole will be
A. same in both cases
B. 2 times more
C. 3 times more
D. 4 times more
E. unpredictable.

Answer : C

Q14. Euler’s formula for a mild steel column is not valid if the slenderness ratio is.
A. 60
B. 90
C. 100
D. 120

Answer : A

Machine Design Part 1

Q15. The period during which the cam follower remains at rest, when cam moves, is known as.
A. constant period
B. fixed period
C. dwell period
D. idle period

Answer : C