WorksheetsIndividual Components BSME 3-1
Total questions: 20
Worksheet time: 10mins
Which technologies are pursued to guarantee durability and less wear in gears?
Case hardening, shot peening, and coating
Welding, soldering, and brazing
Polishing, grinding, and buffing
Casting, molding, and forging
What type of motion in gears contributes to complex contact conditions along the line of action?
Rolling and sliding motion
Vibrating and oscillating motion
Rotating and spinning motion
Translating and reciprocating motion
How does the rolling velocity of gears change over the period of meshing?
Decreases linearly
Increases exponentially
Remains constant
Fluctuates randomly
Which materials are mentioned as being used in bulk polymer systems for bearings?
Steel and aluminum
PEEK, PTFE, and ATSP
Copper and brass
Nylon and polyester
What is the primary function of solid lubricants in brake pad formulations?
To increase friction
To reduce wear and enhance fade resistance
To decrease temperature
To increase noise
Which coating is known for being wear and corrosion-resistant but has environmental implications?
Diamond-like carbon (DLC)
Chromium nitride (CrN)
Hard chromium electroplated finishes
Molybdenum-based thermal-sprayed coating
What is a disadvantage of molybdenum-based thermal-sprayed coatings?
High production cost
Low thermal stability
Poor adhesion
High friction
Which advanced coating is effective in both boundary and mixed lubrication under normal temperature conditions?
Chromium nitride (CrN)
Diamond-like carbon (DLC)
Titanium nitride (TiN)
Molybdenum-based coating
What effect did the MoS2 coating have on the surface of threaded fasteners?
Increased surface roughness and decreased skewness
Decreased surface roughness and increased skewness
Made the surface smoother and more colorful
Increased the weight of the fasteners
What is the effect of increasing load or lowering speed on film thickness?
Leads to thinner films
Leads to thicker films
Has no effect on film thickness
Increases film temperature
Why is tribological optimization of cutting tools important in manufacturing?
It affects tool longevity, energy consumption, and surface quality
It increases the color of the machined surface
It reduces the size of the cutting tool
It enhances the sound of the cutting process
What is an example of a material that improves cutting performance and tool life due to its finer internal structure?
Conventional steels
Powder metallurgy high-speed steels (PM HSS)
Aluminum alloys
Carbon fiber composites
What role does surface coating play in resolving tribological problems in gears?
It acts as a protective coating altering tribological properties
It increases the electrical conductivity
It enhances the magnetic properties
It reduces the weight of the gears
What is the benefit of using triboelectric sensors in bearings?
They increase the weight of the bearings
They require external power sources
They provide low-cost continuous monitoring
They decrease the lifespan of the bearings
What issue can uneven tribofilms cause in braking systems?
Increased fuel efficiency
Noise and uneven wear
Enhanced braking efficiency
Reduced material cost
How do optimized seal geometries and multi-lip designs contribute to mechanical systems?
They increase stress concentrations
They promote lubrication film stability
They decrease temperature resistance
They increase leakage rates
What is the primary challenge faced by piston rings in internal combustion engines?
Low pressure conditions
Constant lubrication
Severe friction and wear
Minimal temperature changes
What is a common cause of joint failure in fasteners?
Excessive bolt preload and inaccurate tightening
Insufficient lubrication
Incorrect material choice
Overuse of fasteners
How can limitations in lubrication and cooling during high-speed cutting be overcome?
Using low-pressure coolant systems
Employing high-pressure coolant systems
Avoiding temperature control
Reducing lubrication
What is the benefit of running accurate requirements for surface roughness and lubrication intervals?
Increases production time
Reduces variability and improves component effectiveness and reliability
Decreases the need for skilled labor
Enhances visual appeal
