MMET 401 EXAM 1 WITH
100% CORRECT
ANSWERS
Applications of Hydraulic Fluid Power Systems - Answer- -Elevators
-Hydraulic Cranes
-Aerial Lift Systems
-Industrial Robotic Systems
-Construction Equipment
-Forestry Equipment
Advantages of Fluid Power Applications - Answer- - Large amounts of force can be
created to move extremely heavy loads w/ hydraulic power.
-Large amounts of torque can be developed using hydraulic power (even at low
speeds),
-Fast speeds can be developed using pneumatic power.
-Excellent speed & accuracy control for linear movement is possible.
-Can be used in a wide range of environments
-Manual, electrical, or automatic control is possible.
-Constant speed, force, and torque.
-Composed of simple mechanical systems.
Piston Gas-Charged Accumulator - Answer- Accumulator with a floating piston acting as
a barrier b/w the gas and the hydraulic fluid.
-gas occupies the volume of space above the piston & is pressurized as hydraulic fluid
enters and occupies the space below the piston.
-when the accumulator is pressurized, the gas pressure=system pressure.
Applications of Piston Gas-Charged Accumulator - Answer- -Working in suspension &
load stabilizing systems for construction.
-reducing noise & soothing pump pulsations for industrial automation systems
-controlling pressure spikes for fork lifts.
, Diaphragm Gas Charged Accumulator - Answer- Accumulator with flexible diaphragm
separating the gas & the hydraulic fluid.
-small & lightweight
-gas acts as a spring against diaphragm as system pressure equalizes the pressure in
each hemisphere.
Applications of Diaphragm Gas Charged Accumulator - Answer- -Steam Engines
-Maintaining hydraulic fluid pressure in agricultural machinery & equipment
-absorbing shock for hydrostatic drives in forestry and construction equipment.
Bladder Gas Charged Accumulator - Answer- Accumulator consisting of a seamless
steel shell, rubber bladder with a gas valve, & poppet valve.
Applications of Bladder Gas Charged Accumulator - Answer- -Supporting suspension &
braking systems in mobile hydraulics
-Maintaining pressure & compensating for fluid leakage in industrial hydraulic system.
-Hybrid garbage trucks to reduce consumption.
Recharge Pressure - Answer- the pressure of the compressed gas in an accumulator
prior to the admission of hydraulic fluid.
Force Multiplication Systems - Answer- A system that allows the force applied on one
cylinder to be increased on another cylinder.
-when two cylinders are connected with a hoes, any pressure created by one cylinder
will replaced on the opposite cylinder.
Disadvantages of Fluid Power Applications - Answer- -systems can operate at
extremely high pressures, which can cause safety hazards.
-Expensive
-High noise levels
-Oil spills can create environmental & slipping hazards.
Type 1 Head Protection - Answer- Protect against impacts on top of the head.
Type 2 Head Protection - Answer- Helmets protect against top and side impacts.
-includes wide brims all around helmet.
Class G Head Protection - Answer- General, protect against impact hazards & contact
with voltages up to 2000V.
-most common helmets used in manufacturing, mining, and construction.
Class E Head Protection - Answer- Electrical, protect against impact hazards, & contact
with high voltages up to 20,000V.
Class C Head Protection - Answer- Conductive; Designed for impact protection only and
shouldn't be used when there is danger from electrical hazards.
100% CORRECT
ANSWERS
Applications of Hydraulic Fluid Power Systems - Answer- -Elevators
-Hydraulic Cranes
-Aerial Lift Systems
-Industrial Robotic Systems
-Construction Equipment
-Forestry Equipment
Advantages of Fluid Power Applications - Answer- - Large amounts of force can be
created to move extremely heavy loads w/ hydraulic power.
-Large amounts of torque can be developed using hydraulic power (even at low
speeds),
-Fast speeds can be developed using pneumatic power.
-Excellent speed & accuracy control for linear movement is possible.
-Can be used in a wide range of environments
-Manual, electrical, or automatic control is possible.
-Constant speed, force, and torque.
-Composed of simple mechanical systems.
Piston Gas-Charged Accumulator - Answer- Accumulator with a floating piston acting as
a barrier b/w the gas and the hydraulic fluid.
-gas occupies the volume of space above the piston & is pressurized as hydraulic fluid
enters and occupies the space below the piston.
-when the accumulator is pressurized, the gas pressure=system pressure.
Applications of Piston Gas-Charged Accumulator - Answer- -Working in suspension &
load stabilizing systems for construction.
-reducing noise & soothing pump pulsations for industrial automation systems
-controlling pressure spikes for fork lifts.
, Diaphragm Gas Charged Accumulator - Answer- Accumulator with flexible diaphragm
separating the gas & the hydraulic fluid.
-small & lightweight
-gas acts as a spring against diaphragm as system pressure equalizes the pressure in
each hemisphere.
Applications of Diaphragm Gas Charged Accumulator - Answer- -Steam Engines
-Maintaining hydraulic fluid pressure in agricultural machinery & equipment
-absorbing shock for hydrostatic drives in forestry and construction equipment.
Bladder Gas Charged Accumulator - Answer- Accumulator consisting of a seamless
steel shell, rubber bladder with a gas valve, & poppet valve.
Applications of Bladder Gas Charged Accumulator - Answer- -Supporting suspension &
braking systems in mobile hydraulics
-Maintaining pressure & compensating for fluid leakage in industrial hydraulic system.
-Hybrid garbage trucks to reduce consumption.
Recharge Pressure - Answer- the pressure of the compressed gas in an accumulator
prior to the admission of hydraulic fluid.
Force Multiplication Systems - Answer- A system that allows the force applied on one
cylinder to be increased on another cylinder.
-when two cylinders are connected with a hoes, any pressure created by one cylinder
will replaced on the opposite cylinder.
Disadvantages of Fluid Power Applications - Answer- -systems can operate at
extremely high pressures, which can cause safety hazards.
-Expensive
-High noise levels
-Oil spills can create environmental & slipping hazards.
Type 1 Head Protection - Answer- Protect against impacts on top of the head.
Type 2 Head Protection - Answer- Helmets protect against top and side impacts.
-includes wide brims all around helmet.
Class G Head Protection - Answer- General, protect against impact hazards & contact
with voltages up to 2000V.
-most common helmets used in manufacturing, mining, and construction.
Class E Head Protection - Answer- Electrical, protect against impact hazards, & contact
with high voltages up to 20,000V.
Class C Head Protection - Answer- Conductive; Designed for impact protection only and
shouldn't be used when there is danger from electrical hazards.
