Calculate the following: 11.1.1 The fluid pressure in the hydraulic system in MPa 11.1.2 The diameter in millimeters of piston B 11.2 State TWO advantages of a chain drive when compared to a belt drive - NSC Mechanical Technology Fitting and Machining - Question 11 - 2021 - Paper 1

To find the diameter of piston B, we need to equate the pressures in both pistons:

$P_A = P_B$

Where:

$P_B = \frac{F_B}{A_B}$

Using the area formula:

$A_B = \frac{\pi D_B^2}{4}$

Given:

• $F_B = 6.45 \times 10^3 \, N$
• $P_A = 2.69 imes 10^6 \, Pa$

Setting the pressure equal:

$2.69 \times 10^6 = \frac{F_B}{\frac{\pi D_B^2}{4}}$

Solving for $D_B$ gives:

$D_B \approx 55.28 \, mm$

1. Higher Efficiency: Chain drives typically have lower power losses compared to belt drives due to reduced slippage, making them more efficient for power transmission.

2. Better Load Handling: Chain drives can handle heavy loads better than belt drives, allowing them to be used in applications where high torque is required without slipping.

1. Fluid Storage: A hydraulic reservoir stores the hydraulic fluid, ensuring there is enough fluid available for the system to operate efficiently.

2. Heat Dissipation: It helps in dissipating heat generated during application, maintaining the fluid temperature within the operational range.

One common application of hydraulic systems is in excavators, where hydraulic power is used to lift and operate the digging arm.