MSSC MAINTENANCE AWARENESS EXAM 2023-2024
ACTUAL EXAM 250 QUESTIONS AND CORRECT
DETAILED ANSWERS WITH RATIONALES (VERIFIED
ANSWERS)|AGRADE
Which of the following is not considered part of the power unit? - answer-Actuator
Most hydraulic motors are modified designs of __________. - answer-pumps
A double-acting cylinder will extend when oil flows into the __________. - answer-cap end
A __________ can show when DHC of a filter has been reached. - answer-bypass indicator
__________ are rated by the size of contaminates they remove. - answer-Hydraulic filters
A directional control valve is used to __________. - answer-change the direction of the fluid
Which of the following is NOT a type of a hydraulic piston motor? - answer-Spring loaded
Which of the following is not considered one of the five basic components of a hydraulic system? -
answer-Pressure
A __________ filter is designed to handle the full pressure of the hydraulic system. It uses a replaceable
cartridge and is enclosed in a metal casing called a bowl. - answer-pressure line filter
Hydraulics deals with the transmission and control of energy by a pressurized __________. - answer-
liquid
When drawing a hydraulic schematic, one rule to remember is to always draw the components
__________. - answer-in a de-energized state
,The __________ filter, commonly used on suction or return lines, is similar in appearance to a pressure
line filter but can not withstand the full pressure of the hydraulic system. - answer-cartridge type filter
Placing a filter in this location allows the filter to be cleaned without shutting down the machine. -
answer-Off-line
Another name for a cylinder would be a(n) __________. - answer-actuator
Grease is made by adding a thickener such as __________ to a liquid lubricant. - answer-metallic soap
Loss of lubrication __________. - answer-is not a major cause of seal damage
In the United States, oil viscosity is measured in __________. - answer-Saybolt Universal Seconds
White grease, or FGL-1, is used for what application? - answer-Food processing
When lubricating a pillow block bearing with an unsealed bearing, the user attaches the coupler into the
grease fitting and slowly pumps the handle of the grease gun __________. - answer-until old grease
begins to flow out of the bearing
The action of old grease coming out of a pillow block bearing with an unsealed bearing is a good sign of
__________. - answer-proper greasing
Fluid samples are normally taken from the middle of the reservoir while the machine is still in operation
when analyzing a __________. - answer-gearbox
The most often used grease is __________ because it provides excellant lubrication under moderate
loads and also at high temperatures and speeds. - answer-Lithium
Mineral oil is derived from __________. - answer-refining crude oil
, Bearing shields can be damaged by __________. - answer-using too much lubrication
Zero defects and breakdowns is a goal of __________. - answer-TPM
There are seven (7) basic types of oils in use today. One of these is refrigeration oils which has a function
to __________. - answer-operate in both high and low temperatures
Low pressure in a hydraulic pump's suction line causes what malfunction? - answer-Cavitation
Lubricants provide six general applications for machines, which of the following is not a general
function? - answer-Allows system to be contaminated due to material in the lubricant
Predictive maintenance is a type of maintenance program that does what function? - answer-Identifies
machine part of component failures before a major breakdown
The thickness of oil is also referred to as __________. - answer-viscosity
Product buildup is the most common vibration problem on __________. - answer-Air fans
Reactive Maintenance is considered a(n) __________ activity. - answer-Unplanned maintenance
The most harmful act a maintenance person can do to a __________ is to get dirt in it. - answer-bearing
Too little lubrication of the __________ can cause seizing in a machine. - answer-bearings
The wear in a mechanical system is minimized by __________. - answer-lubrication
Oil that has been contaminated by __________ will have a milky appearance. - answer-water
ACTUAL EXAM 250 QUESTIONS AND CORRECT
DETAILED ANSWERS WITH RATIONALES (VERIFIED
ANSWERS)|AGRADE
Which of the following is not considered part of the power unit? - answer-Actuator
Most hydraulic motors are modified designs of __________. - answer-pumps
A double-acting cylinder will extend when oil flows into the __________. - answer-cap end
A __________ can show when DHC of a filter has been reached. - answer-bypass indicator
__________ are rated by the size of contaminates they remove. - answer-Hydraulic filters
A directional control valve is used to __________. - answer-change the direction of the fluid
Which of the following is NOT a type of a hydraulic piston motor? - answer-Spring loaded
Which of the following is not considered one of the five basic components of a hydraulic system? -
answer-Pressure
A __________ filter is designed to handle the full pressure of the hydraulic system. It uses a replaceable
cartridge and is enclosed in a metal casing called a bowl. - answer-pressure line filter
Hydraulics deals with the transmission and control of energy by a pressurized __________. - answer-
liquid
When drawing a hydraulic schematic, one rule to remember is to always draw the components
__________. - answer-in a de-energized state
,The __________ filter, commonly used on suction or return lines, is similar in appearance to a pressure
line filter but can not withstand the full pressure of the hydraulic system. - answer-cartridge type filter
Placing a filter in this location allows the filter to be cleaned without shutting down the machine. -
answer-Off-line
Another name for a cylinder would be a(n) __________. - answer-actuator
Grease is made by adding a thickener such as __________ to a liquid lubricant. - answer-metallic soap
Loss of lubrication __________. - answer-is not a major cause of seal damage
In the United States, oil viscosity is measured in __________. - answer-Saybolt Universal Seconds
White grease, or FGL-1, is used for what application? - answer-Food processing
When lubricating a pillow block bearing with an unsealed bearing, the user attaches the coupler into the
grease fitting and slowly pumps the handle of the grease gun __________. - answer-until old grease
begins to flow out of the bearing
The action of old grease coming out of a pillow block bearing with an unsealed bearing is a good sign of
__________. - answer-proper greasing
Fluid samples are normally taken from the middle of the reservoir while the machine is still in operation
when analyzing a __________. - answer-gearbox
The most often used grease is __________ because it provides excellant lubrication under moderate
loads and also at high temperatures and speeds. - answer-Lithium
Mineral oil is derived from __________. - answer-refining crude oil
, Bearing shields can be damaged by __________. - answer-using too much lubrication
Zero defects and breakdowns is a goal of __________. - answer-TPM
There are seven (7) basic types of oils in use today. One of these is refrigeration oils which has a function
to __________. - answer-operate in both high and low temperatures
Low pressure in a hydraulic pump's suction line causes what malfunction? - answer-Cavitation
Lubricants provide six general applications for machines, which of the following is not a general
function? - answer-Allows system to be contaminated due to material in the lubricant
Predictive maintenance is a type of maintenance program that does what function? - answer-Identifies
machine part of component failures before a major breakdown
The thickness of oil is also referred to as __________. - answer-viscosity
Product buildup is the most common vibration problem on __________. - answer-Air fans
Reactive Maintenance is considered a(n) __________ activity. - answer-Unplanned maintenance
The most harmful act a maintenance person can do to a __________ is to get dirt in it. - answer-bearing
Too little lubrication of the __________ can cause seizing in a machine. - answer-bearings
The wear in a mechanical system is minimized by __________. - answer-lubrication
Oil that has been contaminated by __________ will have a milky appearance. - answer-water
