Small Engines Certification – Practice Questions and Correct Answers – Technical Skills Exam Prep (2023–2024)

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Small Engines Questions and Correct Answers/ Latest
Update / Already Graded
When a small gas engine refuses to start, the first check should be: -

Ans: level of the fuel in the tank


air cooled engines can be recognized by: -

Ans: the cooling fins on the cylinder


you have removed the spark plug and it is wet with gasoline, the engine won't
start and no other checks have been made. It can be assumed that: -

Ans: flooding is the problem


If the engine starts readily but runs only a few minutes, the most likely cause of
this problem is: -

Ans: the fuel flow from the tank to the carburetor may be slow or irregular


most small gas engines have a - type lubrication

Ans: splash


fuels stored for a long period of time in the carburetor may contain: -

Ans: excess gum and varnish


if the lawnmower engine vibrates excessively while running, the cause may be: -

Ans: bent crankshaft/ blade out-of-balance/ bent blade--any of the above




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you check the ignition system with the ignition tester and there is no spark. the
most likely cause of this problem is: -

Ans: sheared flywheel key/ grounde/bad coil/ shorted stop switch--any of the
above


which one of the following is not a type of manual starter on a small gas engine-
rope-wind, clutch and ratchet, rope-rewind, or wind-up

Ans: clutch and ratchet


weak compression can be a result of : -

Ans: worn rings


a spark plug with a soft-tan-powdery deposit is an indication of

Ans: lead fouling


a spark plug with a wet-oily deposit is an indication of: -

Ans: oil fouling


when measuring tappet clearance, one should use: -

Ans: a flat feeler gauge


for preventive maintenance, the gasoline fuel system should be emptied and
cleaned and refilled with fuel every -

Ans: 100 hrs of engine operation


during normal operating conditions, the small gas engine oil should be changed
every:-


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Ans: 50 hrs


the air pressure against the air vane tends to - the throttle

Ans: close


the intial adjustment on the Briggs & Stratton flo-jet needle valve is made by
turning it - turn(s) off the seat.

Ans: one and one half


oil foam air cleaners should be cleaned with:

Ans: detergent and water


valves on a 4 cycle small gas engine should be replaced when the orinial margin
thickness has worn more than:

Ans: one-half the thicknesss of the margin


increasing governor spring tension:

Ans: increases the speed of the engine


the engine that you are working on tends to kick back when you try to start it the
problem could be:

Ans: the valve clearances are too wide


if a seat is too wide:

Ans: carbon will build up


when reinstalling the cap to the connecting rod, it is most important to align the:

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Ans: match marks


a lot of 4 cycle small gas engines have an oil - attached to the end of the
connecting rod

Ans: dipper


the part which connects the piston and the connecting rod is known as the:

Ans: piston pin


which of the following is not a type of valve spring retainer: pin, ball, slotted disc,
split collar

Ans: ball


fuel volatility refers to :

Ans: vapor pressure


maintenance of the small gas engine includes:

Ans: an oil change, air filter cleaning or replacement, cleaning and gapping the
spark plug- all of the above


Briggs & Stratton engine 126332 uses a - governor to control engine speed

Ans: mechanical


T/F cleaning the air cooling systems is a routine maintenance item

Ans: true




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