No
No, the voltage rating should not be exceeded. However, you could use a 250v 10a fuse for a 125v 10a fuse.
Use the correct fuse and nothing else.
You use the vacuum cleaner according to the instructions provided on the user manual.
yes. the 250v just means that's the maximum voltage rating the fuse can handle .. so it can def handle 125v. just not vice versa.
electrical
Use carb cleaner or brake cleaner.
Yes, fuses of a higher voltage can be used safely. What is not recommended is to use a lower voltage fuse on higher voltages.
Use an antique hand pumped vacuum cleaner (they existed before the electric ones).
It's best if you just make a policy of never replacing a fuse with anything larger. Engineers have calculated the maximum SAFE circuit draw on an electronic device, and you should not use a fuse that will not provide adequate protection to the circuit. It sounds like .15 amp difference shouldn't cause trouble, but it's not a good idea.
You can it will be safe and no damage will result. However it will blow sooner than the intended fuse would, so the amplifier will no longer have its full normal operating range.
universal motor