Automobile Engineering in ME
The aluminium alloy is used in cylinder blocks because

The piston is also made of aluminium alloy
It does not require any cylinder liners
It is lighter and has good heat dissipation characteristics
Material cost is low

ANSWER DOWNLOAD EXAMIANS APP

Automobile Engineering in ME
The condition that causes vapour locking in a brake system is

Overheating of the fluid due to frequent brake application
Keeping the vehicle without use for an extended period
An excessively high engine speed on a downhill road
Overcooling of the brakes during high speed driving

ANSWER DOWNLOAD EXAMIANS APP