MSSC MAINTENANCE AWARENESS EXAM ACTUAL EXAM 250
QUESTIONS AND CORRECT DETAILED ANSWERS WITH
RATIONALES
6
Which of the following is not considered part of the power unit? - answer-Actuator
2
20
Most hydraulic motors are modified designs of .-answer-pumps
A double-acting cylinder will extend when oil flows into the _ .- answer-cap end
A
am
can show when DHC of a filter has been reached. - answer-bypass indicator
Ex
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
s
rt
Which of the following is NOT a type of a hydraulic piston motor? - answer-Spring loaded
pe
Which of the following is not considered one of the five basic components of a hydraulic system? -
answer-Pressure
Ex
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
,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
26
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
20
Loss of lubrication .- answer-is not a major cause of seal damage
am
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
Ex
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
s
of the bearing
rt
The action of old grease coming out of a pillow block bearing with an unsealed bearing is a good sign of
pe
.-answer-proper greasing
Fluid samples are normally taken from the middle of the reservoir while the machine is still in operation when
Ex
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 dderived 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
2 6
Low pressure in a hydraulic pump's suction line causes what malfunction? - answer-Cavitation
20
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
am
Predictive maintenance is a type of maintenance program that does what function? - answer-Identifies machine
part of component failures before a major breakdown
Ex
The thickness of oil is also referred to as .-answer-viscosity
Product buildup is the most common vibration problem on .-answer-Air fans
ts
Reactive Maintenance is considered a(n) activity. - answer-Unplanned maintenance
r
pe
The most harmful act a maintenance person can do to a is to get dirt in it. - answer-bearing
Ex
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
QUESTIONS AND CORRECT DETAILED ANSWERS WITH
RATIONALES
6
Which of the following is not considered part of the power unit? - answer-Actuator
2
20
Most hydraulic motors are modified designs of .-answer-pumps
A double-acting cylinder will extend when oil flows into the _ .- answer-cap end
A
am
can show when DHC of a filter has been reached. - answer-bypass indicator
Ex
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
s
rt
Which of the following is NOT a type of a hydraulic piston motor? - answer-Spring loaded
pe
Which of the following is not considered one of the five basic components of a hydraulic system? -
answer-Pressure
Ex
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
,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
26
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
20
Loss of lubrication .- answer-is not a major cause of seal damage
am
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
Ex
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
s
of the bearing
rt
The action of old grease coming out of a pillow block bearing with an unsealed bearing is a good sign of
pe
.-answer-proper greasing
Fluid samples are normally taken from the middle of the reservoir while the machine is still in operation when
Ex
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 dderived 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
2 6
Low pressure in a hydraulic pump's suction line causes what malfunction? - answer-Cavitation
20
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
am
Predictive maintenance is a type of maintenance program that does what function? - answer-Identifies machine
part of component failures before a major breakdown
Ex
The thickness of oil is also referred to as .-answer-viscosity
Product buildup is the most common vibration problem on .-answer-Air fans
ts
Reactive Maintenance is considered a(n) activity. - answer-Unplanned maintenance
r
pe
The most harmful act a maintenance person can do to a is to get dirt in it. - answer-bearing
Ex
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
