How many instantaneous centers exist in a standard crank-driven slider-crank mechanism_______________?
Show answer Hide answer
Answer: B. 2
Explanation
A standard slider-crank mechanism has a fixed number of links resulting in six instantaneous centers, not two.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
Related questions
Q1. Which of the following is classified as a lower pair_______________?
Show answer Hide answer
Answer: D. all of the above
Shafts in bearings, straight-line mechanisms, and steering gears all rely on surface contact lower pairs. Lower pairs feature area contact between the mating elements of the kinematic pair. This surface contact distribut...
Q2. What curve is generated by the locus of a point on a taut thread as it is unwound from a cylinder___________________?
Show answer Hide answer
Answer: C. involute
The locus of a point on a taut thread unwound from a cylinder forms an involute curve. As the thread unwinds, its tensioned end traces this specific mathematical trajectory. Involutes provide constant pressure angles ess...
Q3. Which bearing type is best suited to handle fluctuating dynamic loads_________________?
Show answer Hide answer
Answer: C. needle roller bearing
Needle roller bearings feature high length-to-diameter ratio rollers providing immense load capacity. Their compact radial profile handles fluctuating dynamic loads efficiently in tight spaces. Distributed line contact h...
Q4. Under what condition is a kinematic chain considered unconstrained_____________?
Show answer Hide answer
Answer: C. L.H.S. < R.H.S
When mobility calculations yield an excess of degrees of freedom, the chain is deemed unconstrained. The mathematical condition where LHS is less than RHS indicates multiple uncoordinated relative motions. Such chains ca...
Q5. Which of the following is an example of a spherical pair_____________________?
Show answer Hide answer
Answer: C. ball and socket joint
A ball and socket joint permits rotation in all directions, representing a spherical pair. The mating elements feature spherical surfaces that slide freely against each other. This geometry allows three degrees of rotati...
Q6. What type of relative motion occurs in a higher kinematic pair_____________________?
Show answer Hide answer
Answer: E. combination of sliding and turning
Higher kinematic pairs have point or line contact between the mating surfaces. Under mechanical loads, this concentrated contact geometry causes simultaneous sliding and turning. Cam and follower or gear tooth interactio...