Does the sand hauling company road test usually include backing?

Technically , backing is a required part of a road test. But I know many companies don't follow this. From the FMCSA

§ 391.31 Road test.
(a) Except as provided in subpart G, a person shall not drive a commercial motor vehicle unless he/she has first successfully completed a road test and has been issued a certificate of driver's road test in accordance with this section.

(b) The road test shall be given by the motor carrier or a person designated by it. However, a driver who is a motor carrier must be given the test by a person other than himself/herself. The test shall be given by a person who is competent to evaluate and determine whether the person who takes the test has demonstrated that he/she is capable of operating the commercial motor vehicle, and associated equipment, that the motor carrier intends to assign him/her.

(c) The road test must be of sufficient duration to enable the person who gives it to evaluate the skill of the person who takes it at handling the commercial motor vehicle, and associated equipment, that the motor carriers intends to assign to him/her. As a minimum, the person who takes the test must be tested, while operating the type of commercial motor vehicle the motor carrier intends to assign him/her, on his/her skill at performing each of the following operations:

(1) The pretrip inspection required by § 392.7 of this subchapter;

(2) Coupling and uncoupling of combination units, if the equipment he/she may drive includes combination units;

(3) Placing the commercial motor vehicle in operation;

(4) Use of the commercial motor vehicle's controls and emergency equipment;

(5) Operating the commercial motor vehicle in traffic and while passing other motor vehicles;

(6) Turning the commercial motor vehicle;

(7) Braking, and slowing the commercial motor vehicle by means other than braking; and

(8) Backing and parking the commercial motor vehicle.

Strange thing is a company can, in most cases accept your CDL in lieu of a road test.

§391.31 Road test.

Guidance Q&A
Question 1: Are employers still required to administer road tests since all States have implemented CDL skills testing?

Guidance: The employer may accept a CDL in lieu of a road test if the driver is required to successfully complete a road test to obtain a CDL in the State of issuance. However, if the employer intends to assign to the driver a vehicle necessitating the doubles/triples or tank vehicle endorsement, the employer must administer the road test under §391.31 in a representative vehicle