Ramsay Test Print Reading and Schematics 5

Question 1

On a thread callout '1/4-20 UNC', what does the number 20 represent?

Accepted Answer

Threads per inch

Answer

The thread length in millimeters

Answer

The number of threads total

Answer

The drill size

Question 2

In a relay logic schematic, a coil symbol energizing causes its associated contacts to do what?

Accepted Answer

Change state (open contacts close, closed contacts open)

Answer

Stay in their resting position

Answer

Burn out

Answer

Reverse polarity

Question 3

A break line (a long thin line with a jog or zigzag) on a drawing is used to do what?

Accepted Answer

Show that a long uniform part has been shortened to fit the sheet

Answer

Indicate a broken part

Answer

Mark a weld location

Answer

Separate two assemblies

Question 4

In a P&ID, a dashed line connecting an instrument to a process line usually represents what kind of signal?

Accepted Answer

An electrical signal

Answer

A pneumatic supply line

Answer

A hydraulic line

Answer

A mechanical link

Question 5

An extension line on a dimensioned drawing serves what purpose?

Accepted Answer

Extends from the part to show where a dimension begins and ends

Answer

Shows the centerline of a hole

Answer

Indicates a hidden surface

Answer

Marks the cutting plane

Question 6

In an electrical schematic, a normally closed pushbutton switch is drawn so that in its resting state it does what?

Accepted Answer

Conducts current until the button is pressed

Answer

Blocks current until pressed

Answer

Always blocks current

Answer

Latches open permanently

Question 7

What does the symbol 'R.250' on a print specify?

Accepted Answer

A radius of 0.250 inches

Answer

A diameter of 0.250 inches

Answer

A roughness of 250 microinches

Answer

A rotation of 250 degrees