Texas Civil Service Exam Mechanical and Spatial Aptitude 4

Question 1

A block is shown in a 3D drawing with a hole drilled straight through from front to back. In a top-view drawing, the hole would appear as:

Accepted Answer

Two parallel dashed lines

Answer

Hidden features (not visible from the viewing direction) are shown as dashed lines; a front-to-back hole appears as two dashed lines in the top view.

Question 2

Which type of valve completely stops fluid flow when closed, offering low resistance to flow when open?

Accepted Answer

Gate valve

Answer

A gate valve uses a sliding gate to fully open or close flow with minimal restriction when fully open, unlike globe valves which restrict flow even when open.

Question 3

If a wheel with a 12-inch radius is attached to an axle with a 3-inch radius, what is the mechanical advantage?

Accepted Answer

4

Answer

Mechanical advantage of a wheel and axle = wheel radius / axle radius = 12/3 = 4.

Question 4

A rectangular box is 4 inches long, 3 inches wide, and 2 inches tall. If viewed from directly above, what is the area of the shape you see?

Accepted Answer

12 sq inches

Answer

The top view shows the full length × width = 4 × 3 = 12 square inches.

Question 5

In a belt-and-pulley system, a small pulley drives a large pulley. Compared to the small pulley, the large pulley will:

Accepted Answer

Rotate slower with more torque

Answer

A larger driven pulley rotates more slowly than the driver but produces greater torque, trading speed for force.

Texas Civil Service Exam Practice Test

Texas Civil Service Exam Practice Test

Texas Civil Service Exam Mechanical and Spatial Aptitude 4