What is the primary function of a cam in a mechanical system?
A Transmit power
B Increase speed
C Convert motion
D Control motion
A cam is used to control the motion of a follower in a camshaft mechanism. It generates specific movement profiles, often used in internal combustion engines and automatic machinery for precise motion control.
What does the term “velocity diagram” represent in kinematics?
A Force transmission
B Speed calculation
C Motion analysis
D Position diagram
A velocity diagram is used to visualize the relative velocities of different parts in a mechanism. It helps in understanding the motion paths and speeds of components within a kinematic chain.
Which mechanism is commonly used for converting rotary motion to linear motion?
A Slider-crank
B Pulley system
C Camshaft
D Gear train
A slider-crank mechanism converts rotary motion into linear motion, commonly used in engines and pumps. It consists of a rotating crank, a connecting rod, and a slider, providing efficient motion transformation.
What is the purpose of a flywheel in a machine system?
A Change direction
B Store energy
C Transmit torque
D Control speed
A flywheel stores rotational energy and smooths out fluctuations in speed. It helps maintain a consistent angular velocity in systems like engines, reducing vibrations and maintaining steady performance.
In a gear train, what does the term “gear ratio” refer to?
A Power ratio
B Torque ratio
C Speed ratio
D Efficiency ratio
The gear ratio is the ratio of the angular velocity (speed) between two gears. It defines how the rotational speed is affected when power is transmitted through gears, affecting overall machine performance.
What is the purpose of a governor in a machine?
A Stabilize motion
B Increase power
C Reduce vibrations
D Control speed
A governor regulates the speed of an engine by adjusting the fuel or power input. It automatically adjusts to maintain a constant speed regardless of load variations, ensuring stable operation.
What does “dynamic balancing” in machinery aim to achieve?
A Increase speed
B Reduce vibrations
C Increase torque
D Control temperature
Dynamic balancing involves adjusting the mass distribution of rotating parts to reduce vibrations. This ensures smoother operation, minimizes wear, and extends the life of machinery by reducing unbalanced forces.
What is the primary function of a belt drive in mechanical systems?
A Transmit energy
B Control motion
C Reduce friction
D Increase speed
A belt drive transmits power from one pulley to another by means of a flexible belt. It is commonly used in machinery to transfer mechanical energy between shafts, especially when the distance between them is long.
What kind of motion does a cam mechanism typically produce?
A Constant speed
B Translational motion
C Variable motion
D Uniform motion
A cam mechanism typically produces variable motion by changing the motion of the follower in a non-uniform manner. This allows for complex, controlled movement used in various mechanical systems, such as engines.
In a gear system, what does “involute” refer to?
A Gear shape
B Gear type
C Gear material
D Gear speed
The involute is a specific curve used to form gear teeth. It ensures smooth engagement between gears, minimizing slipping and wear, which improves the efficiency and longevity of the gear system.
What does the term “dynamic modeling” refer to in machine dynamics?
A Structural analysis
B Speed analysis
C Motion simulation
D Force analysis
Dynamic modeling refers to simulating the motion of a system to predict how it behaves under various forces. This helps engineers design more efficient and reliable systems by understanding how components move and interact.
What is the role of a torque converter in machinery?
A Convert power
B Change direction
C Control speed
D Convert torque
A torque converter is a type of fluid coupling used in automatic transmissions to transfer and multiply torque. It allows for smooth engagement between the engine and the drive shaft, adjusting torque as needed for optimal performance.
What is a typical application of a chain drive system?
A Speed reduction
B Power transmission
C Vibration reduction
D Control motion
A chain drive is commonly used for power transmission in machinery, such as in bicycles, motorcycles, and industrial machines. It transmits rotational power from one sprocket to another with high efficiency and durability.
Which of the following is an example of a robotic mechanism?
A Pulley system
B Gear train
C Manipulator arm
D Camshaft
A manipulator arm is a key component in robotic mechanisms. It is used to perform tasks such as picking up, moving, or placing objects, offering precise and programmable motion in automated systems.
What is the primary goal of vibration analysis in machine dynamics?
A Vibration reduction
B Stability improvement
C Energy optimization
D Speed control
Vibration analysis helps in identifying and reducing unwanted vibrations in machines. By monitoring and analyzing vibrations, engineers can improve machine stability, minimize wear, and ensure efficient operation.