Exam (elaborations)

ASE A1 (Engine Repair) Practice Test Cumulative Questions And Answers 100% Verified.

0 purchase

Course
ASE A1 Practice

Institution
ASE A1 Practice

[Show more]

Preview 4 out of 48 pages

View example

Uploaded on September 22, 2024
Number of pages 48
Written in 2024/2025
Type Exam (elaborations)
Contains Questions & answers

ase a1 engine repair practice test cumulative q

Institution ASE A1 Practice
Course ASE A1 Practice

techgrades Member since 1 year 145 documents sold

$13.99

Add to cart

Add to wishlist

100% satisfaction guarantee
Immediately available after payment
Both online and in PDF
No strings attached

ASE A1 (Engine Repair) Practice Test
Cumulative Questions And Answers 100%
Verified.

an engine miss is being diagnosed using a cylinder leakage test.
Technician A says that any cylinder with over 20% leakage has excessive leakage.
Tech B says that air leaking from the tailpipe indicates a cracked cylinder.

A only,
B only,
A & B,
Neither . - correct answer. A only:

If cylinder leakage exceeds 20%, check for air escaping the tailpipe, the PCV valve
opening in the rocker arm cover, and the top of the throttle body or carburetor.

Air leaking from the tailpipe usually indicates an exhaust valve leak

during a compression test, a cylinder has 40% of the specified compression reading.
When the tech performs a wet test, the compression reading on this cylinder has 75% of
the specified reading. The cause of the low compression reading could be

worn piston rings,
a burned exhaust valve,
a bent intake valve,
a worn camshaft lobe, - correct answer. worn piston rings

if compression increases during a wet test, this indicates worn piston rings.
Compression would not increase if an exhaust valve is burned, intake valve is bent, or
camshaft lobe is worn.

the customer complains that the engine cranks but does not start; the first thing to check
should be

valve train operation,
battery voltage,
compression,
engine vacuum, - correct answer. valve train operation:

,if the engine cranks properly, the battery is not the problem. Compression would not be
the FIRST test, and because engine vacuum is low during a crank, a vacuum test would
not be conclusive.

during a cylinder balance test on an engine with fuel injection, one cylinder provides
very little rpm drop.
Tech A says the ignition system may be misfiring on that cylinder.
Tech B says the engine may have an intake manifold vacuum leak.

A only,
B only,
A & B,
Neither , - correct answer. Both A&B

Both a misfiring ignition system and an intake manifold leak could cause a cylinder to
contribute too little power

while discussing basic diagnostic procedures,
Tech A says the most complicated diagnostic tests should be performed first. Tech B
says that you should first question the customer to obtain as much info as possible
about the problem

A,
B,
A & B,
Neither, - correct answer. B

Always attempt the more simple diagnosis first

with the engine idling, a vacuum gauge connected to the intake manifold fluctuates
(from 15 to 20). These fluctuations may be caused by

late ignition timing,
intake manifold vacuum leaks,
a restricted exhaust system,
sticky valve stems and guides, - correct answer. sticky valve stems and guides

-late ignition timing would result in a low, steady reading
-intake manifold leaks would cause a very low, steady reading
-a restricted exhaust system would cause vacuum to slowly decrease after the engine
was accelerated and held steady

oil is leaking from the crankshaft rear main bearing seal on an engine. Tech A says the
oil seal could be faulty. Tech B says the PCV system may not be functioning.

,A,
B,
A & B,
Neither, - correct answer. A&B

A high-pitched squealing noise is heard during hard acceleration. This may be the
cause of:

intake manifold leak,
the choke stuck closed
fuel system leak
small leak in exhaust manifold - correct answer. small leak in exhaust manifold

-intake manifold leak causes a high-pitched whistle at idle and low speeds
-carb choke stuck closed will not cause a high-pitched whistle
-fuel system leak normally would not cause a noise

a heavy thumping noise occurs with the engine idling, but the oil pressure is normal. this
may be caused by:

worn pistons and cylinders,
loose flywheel bolts,
worm main bearings,
loose camshaft bearings, - correct answer. loose flywheel bolts

-worn pistons and cylinders would cause a thumping noise during acceleration
-worn main bearings cause a thump when the engine is started
-loose camshaft bearings would cause a growling noise at all times

after a vehicle is parked overnight and then started in the morning, the engine has a
lifter noise that disappears after running for a short time. this may be caused by:

low oil pressure,
low oil level,
worn lifter bottom,
excessive lifter leak-down, - correct answer. excessive lifter leak-down

low oil pressure would result in a continuous noise
low oil level would result in a continuous noise
worn lifter bottom would result in a continuous noise

when using a compression tester, the readings on the cylinders are all even, but lower
than spec. this could indicate:

blown head gasket,

, carbon buildup,
cracked head,
worn rings and cylinders, - correct answer. worn rings and cylinders

-a low reading on two adjacent cylinders may indicate a blown head gasket
-carbon buildup would cause a high reading
-a low reading on two adjacent cylinders may indicate a cracked head

a cylinder balance test is being performed on an engine to determine which cylinder is
causing a miss.
Tech A says that when the faulty cylinder is disabled, engine rpm will drop more than for
the other cylinders.
Tech B says disabling the faulty cylinder will cause the engine to stall

A,
B,
Both,
Neither, - correct answer. Neither

the faulty cylinder will not cause the engine to stall, neither will it cause the engine to
drop in RPM since it is faulty.

an engine is idling at 750 rpm. the pointer on the vacuum gauge is floating between 11
and 16 in Hg. The most likely cause is

retarded timing,
advanced timing,
stuch EGR valve,
too lean idle mixture, - correct answer. too lean idle mixture

all others would not result in gauge fluctuation

the first step a Tech should take for diagnosis is:

think of possible causes of the problem,
question the customer,
road test the vehicle,
listen to the customer, - correct answer. listen to the customer

the customer says that the engine requires excessive cranking to start. the LEAST likely
cause of this problem would be:

cracked cylinder block,
jumped timing belt,
faulty fuel pump,
stuck-open EGR valve, - correct answer. cracked cylinder block

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.

Quick and easy check-out

You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.

Focus on what matters

Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!

Frequently asked questions

What do I get when I buy this document?

You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.

Satisfaction guarantee: how does it work?

Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.

Who am I buying these notes from?

Stuvia is a marketplace, so you are not buying this document from us, but from seller techgrades. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for $13.99. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

69052 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 15 years now

Start selling

Exam (elaborations)

ASE A1 (Engine Repair) Practice Test Cumulative Questions And Answers 100% Verified.

Document information

Subjects

Written for

Seller

Reviews received

Content preview