Master Service Technician CH. 1-7
Solved 100% Correct
a break away clutch is an electric stating system component that allows the stater motor
to spin faster than the flywheel - ANSWER-False
A Briggs & Stratton engine equipped with a Vacu-Jet carburetor should be adjusted with
the fuel tank full. - ANSWER-False
A Cobalite hard faced exhaust valve should always be resurfaced during valve service
to ensure long life. - ANSWER-False
A common cause of insufficient valve rotation on a gasoline air-cooled engine is: -
ANSWER-lack of clearance between the valve stem and the valve guide, improperly
positioned valve spring, excessive combustion deposits.
A completely high speed air bleed can commonly cause an engine to run very rich
under load. - ANSWER-False
A cylinder leakdown tester is used by a small engine service technician to determine the
sealing capabilities of an engine. The most important component of successful and
accurate testing is to: - ANSWER-Listen carefully to all external orifices for audible leaks
A dry bulb and a wet bulb primer system work in conjunction with the choke plate
provide east cold starting of the engine - ANSWER-True
A horizontal shaft engine featuring a carburetor with a pilot jet exhibits the following
symptoms:
Hard to start cold
Hunts and surges under pressure
Runs well at idle and top no-load speeds - ANSWER-Technician A: ays that the cause
of the symptoms is a partially blocked fixed main jet orifice
A landscape contractor complains that his 16 HP 52" commercial walk behind rotary
mower does not move through high grass fast enough. he asks that a higher
horsepower engine be installed so he can mow the grass at a higher rate of speed. -
ANSWER-Technician A: installing a 20HP Vanguard V-twin engine would solve the
problem
A new engine on a clear water pump operated at an elevation of 6000' will experience
some degree of performance problems. Which of the following is most accurate as to
the nature of the anticipated performance problem - ANSWER-reduced horsepower
output/engine running richer than normal at all speeds and load
, A newly overhauled engine exhibits excessive white/blue smoke at idle top no-load
speeds and while under load. Which of the following could cause this? - ANSWER-An
incorrectly installed wiper ring
A small arc welder using an engine equipped with a mechanical governor system is
brought in for repair. The customer complaint is that although the engine reaches the
correct top no-load speed, when the user begins to weld, the engine rpm decreases to
the point that the welder can no longer produce the proper amperage to perform the
welding task at hand. the quality of the weld is very questionable as the output of the
welder is not dependable. other than the abrupt decrease in engine rpm under load, the
engine operates without any problems. - ANSWER-Technician B: to correct this
problem, install a lighter rated spring and perform the normal fixed speed governor
adjustment procedures
A zener diode needs a minimum of 12 Vin the battery in order to function correctly -
ANSWER-False
after an engine has completed one full operating cycle, how many degrees has the
crankshaft rotated? - ANSWER-720 degress
After servicing the carburetor, a technician is performing a compete governor system
adjustment. the governor system on the engine has two springs: the governor idle
spring and the norma primary governor spring, which of the two speed settings is
adjusted first? - ANSWER-The govern idle speed
all briggs & Stratton two-cylinder engines use a single ignition armature with two spark
plug wires - ANSWER-True
All engines with a pneumatic or mechanical governor system experience some degree
of rpm decrease when placed under moderate to heavy loads - ANSWER-Technician A
and Technician B
All other things being equal (compression ratio, volume of fuel, air, etc), can the
downward force or pressure on a piston be increased by using a domed piston head
configuration? - ANSWER-No
An engine becomes equipped with an internally vented carburetor will exhibit ___ form
the exhaust system if the air cleaner becomes more than 70% clogged - ANSWER-No
smoke
An engine exhibits hunting and surging while operating t idle and top no-load speeds.
the hunting and surging is not evident when the engine is operated under moderate to
heavy loads. which of the following is the most probable cause of these symptoms -
ANSWER-A blocked idle circuit air bleed
Solved 100% Correct
a break away clutch is an electric stating system component that allows the stater motor
to spin faster than the flywheel - ANSWER-False
A Briggs & Stratton engine equipped with a Vacu-Jet carburetor should be adjusted with
the fuel tank full. - ANSWER-False
A Cobalite hard faced exhaust valve should always be resurfaced during valve service
to ensure long life. - ANSWER-False
A common cause of insufficient valve rotation on a gasoline air-cooled engine is: -
ANSWER-lack of clearance between the valve stem and the valve guide, improperly
positioned valve spring, excessive combustion deposits.
A completely high speed air bleed can commonly cause an engine to run very rich
under load. - ANSWER-False
A cylinder leakdown tester is used by a small engine service technician to determine the
sealing capabilities of an engine. The most important component of successful and
accurate testing is to: - ANSWER-Listen carefully to all external orifices for audible leaks
A dry bulb and a wet bulb primer system work in conjunction with the choke plate
provide east cold starting of the engine - ANSWER-True
A horizontal shaft engine featuring a carburetor with a pilot jet exhibits the following
symptoms:
Hard to start cold
Hunts and surges under pressure
Runs well at idle and top no-load speeds - ANSWER-Technician A: ays that the cause
of the symptoms is a partially blocked fixed main jet orifice
A landscape contractor complains that his 16 HP 52" commercial walk behind rotary
mower does not move through high grass fast enough. he asks that a higher
horsepower engine be installed so he can mow the grass at a higher rate of speed. -
ANSWER-Technician A: installing a 20HP Vanguard V-twin engine would solve the
problem
A new engine on a clear water pump operated at an elevation of 6000' will experience
some degree of performance problems. Which of the following is most accurate as to
the nature of the anticipated performance problem - ANSWER-reduced horsepower
output/engine running richer than normal at all speeds and load
, A newly overhauled engine exhibits excessive white/blue smoke at idle top no-load
speeds and while under load. Which of the following could cause this? - ANSWER-An
incorrectly installed wiper ring
A small arc welder using an engine equipped with a mechanical governor system is
brought in for repair. The customer complaint is that although the engine reaches the
correct top no-load speed, when the user begins to weld, the engine rpm decreases to
the point that the welder can no longer produce the proper amperage to perform the
welding task at hand. the quality of the weld is very questionable as the output of the
welder is not dependable. other than the abrupt decrease in engine rpm under load, the
engine operates without any problems. - ANSWER-Technician B: to correct this
problem, install a lighter rated spring and perform the normal fixed speed governor
adjustment procedures
A zener diode needs a minimum of 12 Vin the battery in order to function correctly -
ANSWER-False
after an engine has completed one full operating cycle, how many degrees has the
crankshaft rotated? - ANSWER-720 degress
After servicing the carburetor, a technician is performing a compete governor system
adjustment. the governor system on the engine has two springs: the governor idle
spring and the norma primary governor spring, which of the two speed settings is
adjusted first? - ANSWER-The govern idle speed
all briggs & Stratton two-cylinder engines use a single ignition armature with two spark
plug wires - ANSWER-True
All engines with a pneumatic or mechanical governor system experience some degree
of rpm decrease when placed under moderate to heavy loads - ANSWER-Technician A
and Technician B
All other things being equal (compression ratio, volume of fuel, air, etc), can the
downward force or pressure on a piston be increased by using a domed piston head
configuration? - ANSWER-No
An engine becomes equipped with an internally vented carburetor will exhibit ___ form
the exhaust system if the air cleaner becomes more than 70% clogged - ANSWER-No
smoke
An engine exhibits hunting and surging while operating t idle and top no-load speeds.
the hunting and surging is not evident when the engine is operated under moderate to
heavy loads. which of the following is the most probable cause of these symptoms -
ANSWER-A blocked idle circuit air bleed
