Pneumatics quiz 1

Question 1

A ______ is essential for running hydraulic power systems smoothly.

Answer 1

Hydraulic pump

Question 2

It is connected to either a _______ and _______ induction motor.

Answer 2

single-phase, three-phase

Question 3

The pump shaft and motor shaft are coupled using a ____ , ______ and _______.

Answer 3

gasket, nuts, and bolts.

Question 4

The pump generates ___________, not ________

Answer 4

Flow, pressure

Question 5

_________ results from resistance to fluid flow.

Answer 5

Pressure

Question 6

________ creates a vacuum, increasing volume and pulling water from sources like lakes, ponds, or rivers.

Answer 6

Positive Half Cycle

Question 7

Discharges water by reducing volume.

Answer 7

Negative Half Cycle

Question 8

The heart of hydraulic a hydraulic system

Answer 8

Pump

Question 9

The ______ does not generate pressure.

Answer 9

Pump

Question 10

A pump is a hydraulic machine that is used to import_____________ to water and or liquid in the form of pressure energy or kinetic energy

Answer 10

Hydraulic energy

Question 11

The speed of a pump shaft depends on the ____________.

Answer 11

motor shaft speed

Question 12

Motor shaft speed is expressed as,

Answer 12

N_s = 120f/P

Question 13

The amount (volume) of fluid that delivers per unit time through the discharge pipe

Answer 13

Flow Rate

Question 14

Pump flow rate is expressed as,

Answer 14

Qt = Vp x N

Question 15

An ________ converts electrical power to mechanical power to drive or rotate the pump.

Answer 15

Induction motor

Question 16

The ________ is produced when the pump-motor is rotating in a specified direction

Answer 16

Torque

Question 17

The torque that is generated at the ________ of the motor pump

Answer 17

shaft

Question 18

Torque is expressed as,

Answer 18

T = F x r

Question 19

The rate of receiving and delivering energy is known as power (p) and mathematically, it is expressed as,

Answer 19

p = 2πT x N

Question 20

__________ is used to pump when a certain volume of fluid is displaced and transferred from one place to another place.

Answer 20

Hydraulic pump

Question 21

According to Displacement,

Answer 21

1. Positive displacement (hydrostatic) pump (PDP)
2. Non-positive (hydrodynamic or kinetic or dynamic pressure) pump (NPDP)

Question 22

Types of positive displacement pump

Answer 22

1. Reciprocating
2. Rotating

Question 23

Types of Reciprocating Pump According to action of water on piston

Answer 23

1. single-acting pump
2. Double -acting pump

Question 24

Types of Reciprocating Pump Based on the number of cylinder uses

Answer 24

1. Single-cylinder pump
2. Double-cylinder pump
3. Triple-cylinder pump

Question 25

__________ develops flow by carrying fluid between the teeth of two meshed gears

Answer 25

gear pump

Question 26

__________ are considerably larger than gear teeth pumps, but there are only two or three ________ are used on each rotor.

Answer 26

lobe pumps, lobe

Question 27

consists of a circular rotor rotating inside of a larger circular cavity

Answer 27

Vane pump

Question 28

axial flow positive displacement unit.

Answer 28

Screw pump

Question 29

The two shafts namely the ________ shaft and _______ shaft are attached to form meshing within a close-fitting housing

Answer 29

Driving, driven

Question 30

a ______ the cylinder block and driveshaft are located on the same centerline

Answer 30

Piston pump

Question 31

The piston usually moves __________ direction to create the ________ at the inlet pipe.

Answer 31

Backward, vacuum

Question 32

This type of pump is normally designed with a variable displacement capability. The maximum swash plate angle is limited to ______ by construction

Answer 32

17.5°

Question 33

This _________ is defined as the ratio of the actual flow rate (𝑄𝐴) to the theoretical flow rate (𝑄𝑇 ) of a pump

Answer 33

volumetric efficiency

Question 34

Volumetric efficiency of Gear Pump

Answer 34

80-90 percent

Question 35

Volumetric efficiency of Vane Pump

Answer 35

92 percent

Question 36

Volumetric efficiency of Piston Pump

Answer 36

90-98 percent

Question 37

___________ is defined as the ratio of actual pump power output to the input power of the shaft.

Answer 37

Mechanical efficiency

Question 38

The ___________ is also defined as the product of volumetric efficiency and mechanical efficiency

Answer 38

Overall efficiency