MECHANICAL ENGINEERING DESIGN
ACTUAL TEST BANK TESTED QUESTIONS
WITH VERIFIED SOLUTIONS
●● If two balls of the same size are dropped from the same height,
which one reaches the ground first (neglecting air resistance)?
Answer: Both simultaneously
●● What is the sum of the angle of approach and the angle of recess for
gears called?
Answer: The angle of action
●● If two shafts of the same length transmit equal torques and have the
same maximum stress, what else do they have in common?
Answer: Polar moment of inertia
●● What does the size of a cam depend on?
Answer: Base circle
●● How can gear train value be defined?
Answer: Equal to velocity ratio
,●● What is a movable joint of two links in contact called?
Answer: Kinematic pair
●● How is shearing efficiency of a rivet expressed?
Answer: Shearing strength per strength of rivet joint
●● What is the amount by which the dedendum in a given gear exceeds
the addendum of its mating gear called?
Answer: Backlash
●● What is a combination of kinematic pairs joined so that relative
motion is completely constrained?
Answer: Mechanism
●● What is the angle between the direction of the follower motion and
normal to the pitch curve called?
Answer: Pressure angle
●● What converts the translational motion of a piston in a slider crank
mechanism into rotary motion?
Answer: Crank
●● What type of pair is a universal joint an example of?
,Answer: Higher pair
●● What is a rock in terms of gear characteristics?
Answer: Infinite diameter
●● What is strain in a direction at a right angle to the applied force
known as?
Answer: Lateral strain
●● Which hardening process is not employed for steels?
Answer: Age hardening
●● What property of a material is toughness related to?
Answer: Impact strength
●● In tolerances and allowances, what does 'fit' mean?
Answer: Degree of tightness or looseness between two mating parts
●● What do outside calipers have?
Answer: Legs which are bent outwards
●● What is a localized compressive stress at the area of contact between
two members called?
, Answer: Bearing stress
●● What is the stress concentration factor the ratio of?
Answer: Maximum stress to the nominal stress
●● How does the rated life of a ball bearing vary?
Answer: Cube of load
●● What is the main purpose of lubricants in bearings?
Answer: To reduce frictional losses and wear between rubbing surfaces
●● What is the best characteristic of spherical roller bearings?
Answer: Self aligning capability
●● What is the effect of centrifugal tension in belts on power
transmitted?
Answer: Power transmitted decreases
●● What does creep in a belt tend to do?
Answer: Reduce the speed of the driven pulley and consequently reduce
the power output
ACTUAL TEST BANK TESTED QUESTIONS
WITH VERIFIED SOLUTIONS
●● If two balls of the same size are dropped from the same height,
which one reaches the ground first (neglecting air resistance)?
Answer: Both simultaneously
●● What is the sum of the angle of approach and the angle of recess for
gears called?
Answer: The angle of action
●● If two shafts of the same length transmit equal torques and have the
same maximum stress, what else do they have in common?
Answer: Polar moment of inertia
●● What does the size of a cam depend on?
Answer: Base circle
●● How can gear train value be defined?
Answer: Equal to velocity ratio
,●● What is a movable joint of two links in contact called?
Answer: Kinematic pair
●● How is shearing efficiency of a rivet expressed?
Answer: Shearing strength per strength of rivet joint
●● What is the amount by which the dedendum in a given gear exceeds
the addendum of its mating gear called?
Answer: Backlash
●● What is a combination of kinematic pairs joined so that relative
motion is completely constrained?
Answer: Mechanism
●● What is the angle between the direction of the follower motion and
normal to the pitch curve called?
Answer: Pressure angle
●● What converts the translational motion of a piston in a slider crank
mechanism into rotary motion?
Answer: Crank
●● What type of pair is a universal joint an example of?
,Answer: Higher pair
●● What is a rock in terms of gear characteristics?
Answer: Infinite diameter
●● What is strain in a direction at a right angle to the applied force
known as?
Answer: Lateral strain
●● Which hardening process is not employed for steels?
Answer: Age hardening
●● What property of a material is toughness related to?
Answer: Impact strength
●● In tolerances and allowances, what does 'fit' mean?
Answer: Degree of tightness or looseness between two mating parts
●● What do outside calipers have?
Answer: Legs which are bent outwards
●● What is a localized compressive stress at the area of contact between
two members called?
, Answer: Bearing stress
●● What is the stress concentration factor the ratio of?
Answer: Maximum stress to the nominal stress
●● How does the rated life of a ball bearing vary?
Answer: Cube of load
●● What is the main purpose of lubricants in bearings?
Answer: To reduce frictional losses and wear between rubbing surfaces
●● What is the best characteristic of spherical roller bearings?
Answer: Self aligning capability
●● What is the effect of centrifugal tension in belts on power
transmitted?
Answer: Power transmitted decreases
●● What does creep in a belt tend to do?
Answer: Reduce the speed of the driven pulley and consequently reduce
the power output
