Pumps

Question 1

What is used to determine the density of a liquid?

Answer 1

Hydrometer

Question 2

The term specific gravity is used to describe which characteristic of liquid?

Answer 2

Density relative to water

Question 3

Convert 200psia to psig

Answer 3

185.3 psig

Question 4

The amount of liquid that is tranferred per min of a rotary pump is defined by?

Answer 4

GPM

Question 5

What controls the direction of flow in a reciprocating pump?

Answer 5

Valves

Question 6

Names two types of positive displacement pumps?

Answer 6

Reciprocating and rotary

Question 7

What must a pump overcome in order to be able to movd the liquid?

Answer 7

Pump head

Question 8

What pump has one internally cut gear and one externally cut hear separated by a crescent?

Answer 8

Internal gear pumps

Question 9

Which pump uses stationary curved passages within the casing?

Answer 9

Diffuser

Question 10

What ard flexible tube pumps used for?

Answer 10

Measured flow

Question 11

What type of flow does an axial flow pump create

Answer 11

Straight line flow does not change in direction

Question 12

What is atmosperic pressure?

Answer 12

It is 14.7 psi at sea level

Question 13

What is the major advantage to centerline mounted pumps?

Answer 13

Thermal growth has little effect on them

Question 14

The head produced by a pump varies directly with?

Answer 14

The square of the impeller diameter

Question 15

Capacity varies directly with?

Answer 15

The diameter of the impeller diameter

Question 16

Brake horsepower varies directly with?

Answer 16

The cube of the impeller diameter

Question 17

What do you use to minimize clearances between impeller and casing? What does this reduce?

Answer 17

Wear rings and the reduces suction recirculation

Question 18

When should wear rings be replaced?

Answer 18

They should be replaced when theyre 3 times the initial clearance

Question 19

What shape are the rotors in an external vane pump?

Answer 19

Oval

Question 20

What must you do before disassembling a lobe pump?

Answer 20

Check for mate marks on the timing gears

Question 21

What lind of pump can be activated by the air?

Answer 21

Diaphramp

Question 22

What device is moved to vary output in an axial piston pump

Answer 22

Swash plate is moved

Question 23

What is the difference between a pumps actual displacement vs its theoretical?

Answer 23

Slip and friction are the differences

Question 24

How is thd capacity of a postitive displacement pump regulated?

Answer 24

By varying the speed

Question 25

What is volumetric efficiency?

Answer 25

The ratio of actual fluid pumped to theoretical value

Question 26

On plunger pumps what is used to control direction of flow?

Answer 26

Check valve

Question 27

What would you use to check temperature of pumps or other rotating equipment?

Answer 27

Pyrometer

Question 28

What causes aeration?

Answer 28

Air being drawn into the suction line (low pressure on the suction side)

Question 29

What protects the shaft of a pump near the gland?

Answer 29

Shaft sleeve

Question 30

When a pump operates at a higher temperature then the motor, where should the motor be placed to compensate for this during alignment?

Answer 30

Motor should be shimmed higher than the pump

Question 31

Which pump can pump a liquid without contaminating the liquid

Answer 31

Diaphram

Question 32

Pump centerline to the level of the discharge tank is called?

Answer 32

Discharge head

Question 33

Pump centerline to the level of supply is known as.

Answer 33

Static suction head

Question 34

What device is moved to vary the output of a rotary vane pump?

Answer 34

The cam rings

Question 35

How can you tell if a vane pump is balanced or not?

Answer 35

Balance has the rotor centered in an elliptical housing and offset rotor is unbalanced

Question 36

What would you use to test a pumps efficiency

Answer 36

Metering and pressure gauges

Question 37

What type of seal is a mechanical seal?

Answer 37

Axial seal

Question 38

Typical packing is considered what type of seal?

Answer 38

Internal seal

Question 39

What does the sizing 1.5 x 3 x 6 for a pump mean?

Answer 39

Size of discharge, size of suction, soze of impeller

Question 40

What is the difference between a piston pump and a plunger pump

Answer 40

A plunger pump has its plunger sliding inside the packing and a piston pump has its packing sliding with its piston

Question 41

What type of lubricator must be used to carry the lubricant long distances?

Answer 41

Oil mist systems

Question 42

How is leakage reduced behind the impeller eye?

Answer 42

Static and dynamic | Alignment

Question 43

What should you do before laser alignment?

Answer 43

Rough alignment

Question 44

Laser beams from the laser are harmful too?

Answer 44

Your eyes

Question 45

When a motor runs at high speeds the alignment accuracy becomes?

Answer 45

The accuracy becomes more important

Question 46

What is the minimum number of reference points for laser alignment?

Answer 46

3 points

Question 47

What is the main referance point fof laser alignments?

Answer 47

12 o'clock position

Question 48

With cross dialing bar sag is added to ______ dial and subtracted from _____ dial

Answer 48

Added to A dial and subtracted from B

Question 49

What are the 4 major pieces of a laser alignment kit?

Answer 49

Transmitter, detector, and the brackets control unit