mechanical engineering basic concepts ojective questions with answers part1

Q1. In which power transmitting drive polygon effect is observed?
(A) Belt drive
(B) Chain drive
(C) Both of these
(D) None of these

Q2. What is meant by gear ratio?
(A) The ratio of pinion speed and gear speed
(B) The ratio of number of teeth on pinion and number of teeth on gear
(C) Both of these
(D) None of these

Q3. Which gears are used to connect two intersecting shaft axes?
(A) Crossed helical gear
(B) Worm and worm wheel
(C) Bevel gears
(D) All of these

Q4. In stress-strain diagram, up to proportional limit
(A) stress is inversely proportional to strain
(B) force is directly proportional to displacement
(C) stress is directly proportional to strain
(D) strain is directly proportional to stress

Q5. Deformation per unit length is called as
(A) strain
(B) stress
(C) modulus of elasticity
(D) None of these

Q6. Which of the following materials do not have a well defined yield point?
(A) Heat treated steel
(B) Concrete
(C) Carbon fiber
(D) All of these

Q7. Factor of safety is the ratio of
(A) working stress and ultimate strength
(B) ultimate stress to working stress
(C) ultimate strength and yield strength
(D) yield strength and working stress

Q8. The degree of closeness of the measured value of a certain quantity with its true value is known as
(A) Accuracy
(B) Precision
(C) Standard
(D) Sensitivity

Q9. Error of measurement =
(A) True value – Measured value
(B) Precision – True value
(C) Measured value – Precision
(D) None of these

Q10. The ability by which a measuring device can detect small differences in the quantity being measured by it, is called its
(A) Damping
(B) Sensitivity
(C) Accuracy
(D) None of these

Q11. The following term(s) is (are) associated with measuring devices
(A) Sensitivity
(B) Damping
(C) Both of these
(D) None of these

Q12. To compare an unknown with a standard through a calibrated system is called
(A) Direct comparison
(B) Indirect comparison
(C) Both of these
(D) None of these

Q13. The following is an internationally recognized and accepted unit system
(A) MKS
(B) FPS
(C) SI
(D) All of these

Q14. One yard = _____ inch
(A) 36
(B) 38
(C) 40
(D) 42

Q15. The following is a line standard of measurement
(A) Measuring tape
(B) Slip gauge
(C) Micrometer
(D) End bars

Q16. The Wringing is due to
(A) Atmospheric pressure
(B) Molecular attraction
(C) Both of these
(D) None of these

Q17. The principle of Interchangeability is normally employed for
(A) Mass production
(B) Production of identical parts
(C) Parts within the prescribed limits of sizes
(D) All of these

Q18. Following is the theoretical size which is common to both the parts of a mating pair
(A) Normal size
(B) Actual size
(C) Base size
(D) All of these

Q19. is equal to the differences of the two limits of size of the part
(A) Tolerance
(B) Low limit
(C) High limit
(D) Design size

Q20. The amount by which the actual size of a shaft is less than the actual size of mating hole in an assembly
(A) Clearance
(B) Interference
(C) Allowance
(D) None of these