What is the purpose of the slider-crank mechanism in mechanical systems?
A Convert rotary to linear
B Increase speed
C Reduce friction
D Store energy
The slider-crank mechanism is used to convert rotary motion into linear motion. It is widely used in internal combustion engines where the crankshaft’s rotation moves the piston in a straight line.
What does a gear train primarily do in a machine system?
A Control speed
B Reduce vibrations
C Transmit power
D Increase torque
A gear train is a system of gears that transmits power from one shaft to another. It plays a key role in transferring motion and adjusting speed and torque in machinery like engines and conveyor belts.
What is the primary role of a flywheel in mechanical systems?
A Transmit motion
B Store kinetic energy
C Increase torque
D Control speed
A flywheel stores kinetic energy during periods of excess speed and releases it during low-speed phases. This helps smooth out fluctuations in speed, maintaining a more consistent operation in machinery like engines.
What is the purpose of dynamic analysis in machine dynamics?
A Calculate energy loss
B Measure power
C Analyze vibrations
D Study forces from motion
Dynamic analysis focuses on understanding the forces generated by the motion of machine components. It helps predict system behavior under varying loads and speeds, ensuring stability and proper functioning of machinery.
Which component is used to reduce vibrations in rotating systems?
A Damper
B Flywheel
C Pulley
D Gear
A damper absorbs and dissipates the energy from vibrations in rotating systems. It helps reduce oscillations, stabilizing machinery and improving performance by preventing wear and tear caused by excessive vibrations.
What is the primary function of a governor in an engine system?
A Transmit power
B Control speed
C Reduce vibrations
D Regulate torque
A governor is used to control the speed of an engine by adjusting fuel or air intake. It ensures that the engine maintains a stable speed, despite changes in load, preventing over-speeding and optimizing fuel efficiency.
What is the main purpose of a cam in mechanical systems?
A Store energy
B Change direction of motion
C Transmit torque
D Control motion of the follower
A cam controls the motion of a follower. Its profile dictates the follower’s movement, allowing for precise timing and motion control. This is essential in systems like engines, where valve timing is critical.
What type of motion does a four-bar linkage system generate?
A Harmonic
B Linear
C Oscillating
D Rotary
A four-bar linkage system generally generates oscillating motion. It is widely used in mechanical systems, such as automotive suspension systems, to produce a controlled back-and-forth movement with minimal complexity.
What is the role of a gear ratio in gear systems?
A Increase efficiency
B Change direction of motion
C Adjust speed and torque
D Control vibration
Gear ratio determines the relationship between the input and output speeds and torques. A higher ratio reduces speed while increasing torque, whereas a lower ratio increases speed while reducing torque, optimizing performance for different applications.
What does “inertia force” refer to in machine dynamics?
A Force due to motion change
B Force due to friction
C Force due to rotation
D Force due to velocity
Inertia force is the force an object experiences when its motion is changed (accelerated or decelerated). It is directly related to the mass and acceleration of the object and is essential in analyzing dynamic forces in machines.
What is the primary function of a torque converter in a mechanical system?
A Increase torque
B Control speed
C Convert rotational power
D Transmit power
A torque converter is used in automatic transmissions to convert and multiply torque from the engine. It allows for smooth engagement between the engine and drive shaft, providing better control over torque transmission.
What does a dynamic balancing process aim to achieve in rotating machinery?
A Reduce friction
B Speed control
C Equalize mass distribution
D Increase torque
Dynamic balancing ensures that mass is evenly distributed around the axis of rotation, reducing vibrations. This process improves the performance and longevity of rotating machinery, such as motors, turbines, and fans.
Which mechanism is used to convert rotary motion into oscillating motion?
A Four-bar linkage
B Gear system
C Crankshaft
D Camshaft
A four-bar linkage is used to convert rotary motion into oscillating motion. It is commonly found in mechanical systems like engines and suspension systems, providing controlled back-and-forth movement.
What is the key benefit of using a camshaft in engines?
A Increase torque
B Control timing of valves
C Transmit power
D Stabilize vibrations
The camshaft in an engine controls the timing of the intake and exhaust valves. By rotating, it pushes the lifters, ensuring that the valves open and close at the correct times for optimal engine performance.
What does a belt drive primarily do in a mechanical system?
A Control speed
B Increase torque
C Transmit power
D Reduce friction
A belt drive transmits power from one shaft to another using a flexible belt. It is commonly used in various machines, including engines, conveyors, and pulleys, for efficient power transmission over long distances.