$6.$ How does the firing order in a multi$-$cylinder engine affect its balancing?

$-$ A$)$ It doesn$$t affect balancing.

$-$ B$)$ It primarily affects thermal balance.

$-$ C$)$ It changes the primary and secondary force distribution.

$-$ D$)$ It only affects the noise levels.

$7.$ In V$-$engine balancing, what is the significance of the angle between the banks?

$-$ A$)$ It affects the primary balance.

$-$ B$)$ It modifies the engine's firing order.

$-$ C$)$ It influences torsional vibrations.

$-$ D$)$ It impacts the secondary balance