Is claiming 10 exemptions for federal tax appropriate?

Only if you qualify for 10 exemption's.

Whether you are entitled to claim a certain number of allowances or exemption from withholding is subject to review by the IRS. Your employer may be required to send a copy of this form to the IRS.

Providing fraudulent information may subject you to penalties.

The number of exemptions claimed, including no tax withheld, is actually part of your entire financial profile and tax payment requirement, and includes all those things like if your married and file jointly, if and how many children you may have, medical deductions, mortgage interest, etc.

WHAT YOU HAVE WITHHELD DOES NOT CHANGE THE AMOUNT OF TAX YOU WILL PAY AT ALL. HAVING TOO MUCH WITHHELD WILL BE REFUNDED UPON FILING YOUR RETURN, TOO LITTLE AND YOU WILL HAVE TO PAY THE ADDITIONAL PLUS PENALTY AND INTEREST, AND BE SUBJECT TO ADDITIONAL SCRUTINY.