TOWES - Test of Workplace Essential Skills Using Diagrams and Schematics Questions and Answers

Question 1

An assembly diagram for a piece of equipment shows a part labeled with a balloon number pointing to it. What is the primary purpose of this balloon number?

Accepted Answer

To cross-reference the part with a detailed list of components, such as a Bill of Materials.

Answer

To indicate the torque specification for the part's fasteners.

Answer

To show the order in which the part should be painted.

Answer

To specify the electrical voltage the part can handle.

Question 2

While reviewing a fluid power schematic, you see a symbol composed of a circle with a 'P' inside and an arrow indicating direction of flow away from it. Which of the following does this symbol most likely represent?

Accepted Answer

A pump

Answer

A pressure gauge

Answer

A pilot line

Answer

A plugged port

Question 3

A technician is troubleshooting a faulty motor using an electrical schematic. The schematic shows a zigzag line symbol labeled 'R5' connected in series with the motor. What does this symbol represent?

Accepted Answer

A resistor

Answer

A fuse

Answer

A switch

Answer

A capacitor

Question 4

You are following a piping and instrumentation diagram (P&ID) for a chemical processing plant. Which of the following is the BEST first step to understand the meaning of the various symbols on the diagram?

Accepted Answer

Locate and consult the legend or symbol key sheet for the diagram.

Answer

Assume the symbols follow international standards and proceed with the task.

Answer

Ask a senior operator what each symbol means.

Answer

Search for the symbols online to find their most common meanings.

Question 5

An exploded-view diagram of a gearbox is provided in a service manual. What is the main advantage of this type of diagram for a mechanic?

Accepted Answer

It clarifies the correct order and orientation of parts for assembly or disassembly.

Answer

It shows the exact final dimensions of the assembled unit.

Answer

It provides a wiring schematic for any electrical components.

Answer

It lists the required lubrication types and quantities.

Question 6

On an electrical one-line diagram, a line representing a power cable is interrupted by a square symbol containing the letters 'CB'. What does this symbol indicate?

Accepted Answer

A circuit breaker

Answer

A connection box

Answer

A control board

Answer

A capacitor bank