1) The study of pneumatics deals with the system operated with
air
water
oil
solid
2) Which one of the following is not true about the use of air in pneumatics?
Air is available everywhere
Air requires no return lines
Air is explosive
Air is non-pollutant
3) In a pneumatic system, a sensor serves the purpose of
Transmission
Control
Feedback
Storage
4) The power source in a pneumatic system is
Air receiver
Compressor
Valve
Muffler
5) The storage space for a fluid is called
Strainer
Reservoir
Plug
Pump
6) Which one of the following is a type of actuator in the hydraulic system?
Pump
Valve
Strainer
Cylinder
7) Which one of the following is the advantage of the pneumatic system?
For low-cost layout
For increasing the rate of production
For a better working environment
All of the above
8) What are the reasons causing a pressure drop in hydraulic systems?
1. long length of pipe
2. friction
3. type of fluid
4. losses in valves and bends
a) 1 and 4
b) only 1
c) 2 and 3
d) all of the above
9) Which factor decides the working pressure of a hydraulic cylinder?
the diameter of the circular flange
the bore diameter of the cylinder
stroke length
all of the above
10) Which fluid is used in hydraulic power systems?
water
oil
non-compressible fluid
all of the above
11) The pressure of 1 bar is equal to
14.5 psi
100 psi
12.5 psi
145 psi
12) Why is fluid power preferred in mobile vehicles?
1. power can be transmitted without any delay
2. when overloaded, fluid power systems stop without damaging the components
3. speed variation cannot be achieved
4. fluid is non-compressible
1 and 4
2, 3 and 4
1, 2 and 4
1 and 2
13) What effect does overloading have on fluid power and electrical systems?
a) electrical components get damaged in electrical systems
b) fluid power system stops working without damaging the components
c) both a. and b.
d) none of the above
14) How is power transmitted in fluid power systems?
a) power is transmitted instantaneously
b) power is transmitted gradually
c) both a. and b.
d) none of the above
15) The hydraulic system is
less precise than the pneumatic system
more precise than the pneumatic system
both hydraulic and pneumatic systems are the same on basis of precision
none of the above
16) Which energy is used to transmit power in the hydrostatic system?
pressure energy
kinetic energy
potential energy
all the above
17) Which of the following reasons make the water unsuitable to use as a fluid in hydraulic systems?
1. poor lubrication
2. high viscosity
3. more leakage
4. quickly evaporates
1 and 3
2 and 4
1, 3 and 4
all the above
18) The heat generated in hydraulic systems can be absorbed by
lubrication
cooling
sealing
all the above
19) High viscosity fluids have
low-pressure drop
less power consumption
slow operation
all the above
20) The resistance offered to the flow of fluid inside a piston develops into
pressure
force
stress
all the above
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