At a jobber's counter, a customer holding a serpentine belt asks for 'the spring-loaded pulley that keeps the belt tight.' Which part is the customer describing?

The alternator decoupler pulley.

A customer restoring an older utility tractor asks for a radiator for a 'model T-470,' as its new hood decals read. The serial plate on the tractor's frame identifies it as a model T-410. What does the parts technician look up?

The radiator listed for the model T-410 on the serial plate.

The radiator listed for the model T-470 on the new decals.

Both radiators, so the customer can return the one that misfits.

The radiator for whichever model has the larger cooling capacity.

The store's PO for 10 hydraulic couplers carries the supplier's written quote of $42.50 each, valid to the end of the month. The supplier's order acknowledgement, received today, shows the couplers at $46.75 each. What does the parts technician do?

Have the supplier correct it to the quoted $42.50.

Accept it now and dispute the difference on the invoice.

Accept it, as the acknowledgement replaces the quote.

Cancel the order and reissue it to another supplier.

Parts Technician Red Seal Identifying & Sourcing Parts Practice Questions

Five free practice questions on parts identification and sourcing: block C of the Red Seal 240P Parts Technician exam, about 29 of its 120 questions. They are in the exam's format: four options, one correct answer. Answer each one before opening the explanation. No account, no email.

01The questions

Recall · Identifies parts function

At a jobber's counter, a customer holding a serpentine belt asks for 'the spring-loaded pulley that keeps the belt tight.' Which part is the customer describing?
1. The crankshaft damper.
2. The idler pulley.
3. The belt tensioner.
4. The alternator decoupler pulley.
Show the answer

C. Correct. An automatic tensioner is a spring-loaded arm carrying a pulley; it presses on the belt to hold tension as the belt wears and stretches. It is listed separately from plain idler pulleys, so confirming the description with the customer before the lookup avoids selling the wrong pulley.

Why not the others

A. The crankshaft damper (harmonic balancer) is the drive pulley on the crankshaft that also damps torsional vibration; it drives the belt rather than tensioning it. The spring-loaded pulley the customer describes is the tensioner.

B. An idler pulley turns on a fixed mount: it guides or reroutes the belt but has no spring and does not keep the belt tight on its own. The spring-loaded arm with a pulley is the tensioner.

D. A decoupler pulley lets the alternator overrun the belt to smooth out engine pulses; its spring sits inside the pulley and does not hold belt tension. The part that keeps the belt tight is the tensioner.
Procedural · Identifies parts application

A customer restoring an older utility tractor asks for a radiator for a 'model T-470,' as its new hood decals read. The serial plate on the tractor's frame identifies it as a model T-410. What does the parts technician look up?
1. The radiator listed for the model T-410 on the serial plate.
2. The radiator listed for the model T-470 on the new decals.
3. Both radiators, so the customer can return the one that misfits.
4. The radiator for whichever model has the larger cooling capacity.
Show the answer

A. Correct. The serial plate is fixed to the machine at the factory and identifies the model and serial number that the parts book is organized by; decals, paint and sheet metal can be changed during a restoration. Looking up the T-410 and telling the customer about the mismatch avoids a radiator that does not fit.

Why not the others

B. Decals are the easiest thing on a tractor to change, and these were just replaced. The serial plate on the frame is the factory's identification, so the T-410 listing is the one to use.

C. Sending two radiators passes the identification job to the customer and sets up a return. The serial plate already settles the model: look up the T-410 radiator.

D. Choosing by capacity ignores fit: a radiator for another model can differ in size, mounts and hose connections. The serial plate identifies the tractor as a T-410, so its listed radiator is the part.
Procedural · Identifies parts number

In a fleet's parts room, the listing for a service truck calls for a BCI group 31 battery rated 925 CCA, and no group 31 battery rated 925 CCA is in stock. Which stocked battery does the parts technician issue?
1. Group 31, rated 800 CCA.
2. Group 65, rated 925 CCA.
3. Group 4D, rated 1 100 CCA.
4. Group 31, rated 1 000 CCA.
Show the answer

D. Correct. It is the listed group size, so its maximum dimensions, terminal position and holddown suit the truck, and 1 000 CCA is more than the listed 925 CCA. A substitute may exceed the listed CCA but not fall below it, so this is the battery to issue.

Why not the others

A. The group size matches, but 800 CCA is below the listed 925 CCA. A substitute may carry more cold cranking amps than the listing but not fewer, so this battery falls short even though it fits the tray.

B. The 925 CCA matches the listed rating, but group 65 is a different group size with its own maximum dimensions, terminal position and holddown. The group size has to match first; the CCA then has to be at least the listed 925.

C. More cold cranking amps do not make up for the wrong group. The group size fixes the maximum dimensions, terminal position and holddown; a group 4D is not the group 31 the truck is listed for.
Critical · Searches inventory for parts

The inventory system shows 9 of a seal kit on hand, 7 allocated to open work orders and 6 on order for Thursday. The service manager cancelled one of those work orders this morning, which held 3 of the kits, but the system has not been updated. How many kits can be sold to a counter customer today?
1. 2 kits
2. 5 kits
3. 9 kits
4. 11 kits
Show the answer

B. Correct. Available now = on hand − units still committed: 9 − (7 − 3) = 9 − 4 = 5. Kits on order are not on the shelf until Thursday, and the cancelled work order's 3 kits are free; release that allocation in the system so the record matches.

Why not the others

A. This takes the system's allocation at face value: 9 − 7 = 2. The cancelled work order released 3 kits, so only 4 are still committed and 9 − 4 = 5 can be sold. Release the allocation so the next lookup is right too.

C. This ignores the allocations altogether. Four kits are still committed to open work orders (7 − 3), so selling all 9 would leave those jobs short. Available today: 9 − 4 = 5.

D. This counts Thursday's 6 kits on order as if they were on the shelf: 9 − 4 + 6 = 11. Parts on order cannot be sold over the counter today; only 9 − 4 = 5 are available now.
Procedural · Purchases parts

The store's PO for 10 hydraulic couplers carries the supplier's written quote of $42.50 each, valid to the end of the month. The supplier's order acknowledgement, received today, shows the couplers at $46.75 each. What does the parts technician do?
1. Accept it now and dispute the difference on the invoice.
2. Accept it, as the acknowledgement replaces the quote.
3. Have the supplier correct it to the quoted $42.50.
4. Cancel the order and reissue it to another supplier.
Show the answer

C. Correct. Confirming the price before goods are received and billed is part of purchasing. The PO carries a written quote that is still valid, so the acknowledgement's $46.75 is queried now and corrected: a $4.25 difference per coupler, $42.50 across the 10.

Why not the others

A. Waiting for the invoice turns a simple correction into a billing dispute and may mean paying the higher price first. The mismatch has been caught now, so fix it now.

B. An acknowledgement confirms what the supplier intends to ship and bill; it does not cancel a written quote that is still valid. Query the price before accepting.

D. Cancelling throws away a valid quote and the supplier's ship date over what is likely a pricing error the supplier can correct. Ask for the correction first.

02Answer key

Question	Answer	Sub-task
Q1	C	Identifies parts function
Q2	A	Identifies parts application
Q3	D	Identifies parts number
Q4	B	Searches inventory for parts
Q5	C	Purchases parts

03What block C covers

Finding the right part and getting it in: naming a part from its function, matching it to the application by VIN, model, serial number and build options, working part numbers, supersessions and interchanges, searching stock, choosing between OEM, aftermarket, reman and used suppliers, purchase orders and acknowledgements, landed cost, and arranging special-order shipping.

The Red Seal Occupational Standard names this block “Performs parts acquisition”. It carries 24.2% of the exam, about 29 of the 120 questions, split across two tasks. The share column is each task's weight within the block, as the standard publishes it.

Task and its sub-tasks	Share of block
Identifies parts Identifies parts function; Identifies parts application; Identifies parts number	56%
Sources parts Searches inventory for parts; Identifies suppliers; Purchases parts; Arranges shipment of special orders	44%

04What the questions turn on

Plates and VINs beat descriptions

A serial plate fixed at the factory identifies a machine even after its decals are changed, and a truck's VIN pulls its factory build record when model and year leave several options.

Read supersession notes exactly

A supersession runs old number to new for the same application. Some are one-way, so the old number cannot go where the new one is listed, and a change in unit of sale converts the quantity by the stated ratio.

Available is not the same as on hand

Stock available to sell is on hand less what is still committed to open orders. Parts on order are not on the shelf, and an allocation from a cancelled job is released.

Work out the net and landed cost

Net cost is list times one minus the discount, so the lower list price is not always the lower cost. Inbound and return freight belong in the cost, and a core charge drops out again once the core credit comes back.

05The other blocks

The 240P exam has five blocks. Each has its own page of free questions:

The 240P Parts Technician practice exam page describes the full question bank. How these questions are written and checked: how our questions are made. Found a mistake? Tell us and we will fix it.