MECHANICAL POWER SYSTEMS
SACA(210) EXAM 2025/2026 QUESTIONS
AND ANSWERS 100% PASS.
Mechanical power efficiency is defined as __________. - ANS The ratio of the power out to
the power in
When assembling a key in a shaft keyseat, the key __________. - ANS Should fit into the
keyseat without forcing it
The run-out for a motor shaft is __________ the total indicator reading of one full shaft turn. -
ANS 50% of
What type of mechanical power transmission drive system can be lengthened and shortened
without replacing the complete part? - ANS Chain
What characteristic of a lubricant, also know as resistance to flow, is most important to machine
lubrication? - ANS Viscosity
The nominal height of a key is the height of the keystock without accounting for __________. -
ANS Tolerance
The soft foot mounting condition can cause this when the motor is in use? -
ANS Misalignment and vibration
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, Where should a V-belt ride in the groove of the sheave? - ANS High
The two major types of misalignment corrected by shaft alignment are __________. -
ANS Angular and parallel
The purpose for having a clutch connecting two shafts together is to __________. -
ANS Allow the two shafts to be disconnected while running
The three types of loads placed on bearings are __________. - ANS Radial, thrust, and
combination
What is the advantage of a flexible jaw coupling - ANS Allows more misalignment
What is the dial indicator shown set to measure? - ANS End-float
How does the nominal keyseat height compare to the key height? - ANS Half
What effect does an idler gear located between the driver shaft and the driven shaft have on
the operation of a gearbox? - ANS Changes the direction of rotation
The adjustable motor mount is used __________. - ANS When it is routinely necessary to
change the tension on a belt or chain drive
What effect does friction have on machine operation? - ANS Decreases productive power
The best instrument to use when measuring the inside width of a keyseat or the depth of the
keyseat is a __________. - ANS Dial caliper
How should a key be assembled into a shaft keyseat? - ANS Fit the key into the keyseat
without forcing it.
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
SACA(210) EXAM 2025/2026 QUESTIONS
AND ANSWERS 100% PASS.
Mechanical power efficiency is defined as __________. - ANS The ratio of the power out to
the power in
When assembling a key in a shaft keyseat, the key __________. - ANS Should fit into the
keyseat without forcing it
The run-out for a motor shaft is __________ the total indicator reading of one full shaft turn. -
ANS 50% of
What type of mechanical power transmission drive system can be lengthened and shortened
without replacing the complete part? - ANS Chain
What characteristic of a lubricant, also know as resistance to flow, is most important to machine
lubrication? - ANS Viscosity
The nominal height of a key is the height of the keystock without accounting for __________. -
ANS Tolerance
The soft foot mounting condition can cause this when the motor is in use? -
ANS Misalignment and vibration
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, Where should a V-belt ride in the groove of the sheave? - ANS High
The two major types of misalignment corrected by shaft alignment are __________. -
ANS Angular and parallel
The purpose for having a clutch connecting two shafts together is to __________. -
ANS Allow the two shafts to be disconnected while running
The three types of loads placed on bearings are __________. - ANS Radial, thrust, and
combination
What is the advantage of a flexible jaw coupling - ANS Allows more misalignment
What is the dial indicator shown set to measure? - ANS End-float
How does the nominal keyseat height compare to the key height? - ANS Half
What effect does an idler gear located between the driver shaft and the driven shaft have on
the operation of a gearbox? - ANS Changes the direction of rotation
The adjustable motor mount is used __________. - ANS When it is routinely necessary to
change the tension on a belt or chain drive
What effect does friction have on machine operation? - ANS Decreases productive power
The best instrument to use when measuring the inside width of a keyseat or the depth of the
keyseat is a __________. - ANS Dial caliper
How should a key be assembled into a shaft keyseat? - ANS Fit the key into the keyseat
without forcing it.
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
