Power

Question 1

Motor with low starting load. Torque can be obtained by providing a separate winding or auxiliary phase 90 displaced in space eom main winding

Answer 1

Split-phase motor

Question 2

Motor capable of starting heavier load than split phase motor.

Answer 2

Capacitor -Start Inductor motor

Question 3

Motor that develops high starting torque. Torque can be obtained by providing a winding and commutator on the rotor with a single pair of short circuited brushes for starting

Answer 3

Repulsion Start induction motor

Question 4

Holds the parts of motor together and protect the internal components from the environment

Answer 4

Enclosure

Question 5

The stationary part of the motor which is sometime referred to as windings.

Answer 5

Stator

Question 6

The rotating part of the motor where the magnetic field from stator induces an opposing magnetic field onto the rotor causing it to push away from the stator field.

Answer 6

Rotor

Question 7

Shaft height in inches for integral horsepower motors may be obtained by.

Answer 7

Dividing the first two no. of the frame size by four.

Question 8

Shaft height in inches for fractional horsepower motors may be obtained by.

Answer 8

Dividing the first two no. of the frame size by 16.

Question 9

What are the integral horsepower motors.

Answer 9

Those hp greater than 1.

Question 10

What are fractional hp

Answer 10

Those hp lower than 1

Question 11

At all time from start to full speed, the torque supplied by the motor is greater than

Answer 11

Required by the load.

Question 12

If the load torque is higher than motor torque, the motor will ____.

Answer 12

Stall.

Question 13

Type of service in which the motor us operated for more than 60 minutes at a time.

Answer 13

Continuous Duty

Question 14

Type of service wherein it is operated for up to 30 mins. at a time with a rest or cooling period between operation

Answer 14

Intermittent duty type

Question 15

Service factor for an integral horsepower motors.

Answer 15

1.15

Question 16

Service factors for fractional horsepower.

Answer 16

1.25 for 3/4 ho to 1.4 for 1/20 hp

Question 17

The greater the horsepower rating of the motor, the greater the ____

Answer 17

Motors ability to develop mechanical power.

Question 18

Available horsepower rating of motors

Answer 18

1/6, 1/4, 1/3, 3/4, 1, 1.5, 2,3,5,7.5

Question 19

Most common speed of the motor ranges from

Answer 19

1700 to 1750 rpm

Question 20

If motor will replace a man, how much hp can the motor do the job.

Answer 20

1/4 hp

Question 21

To replace the an engine to motor, multiply the engine hp by

Answer 21

2/3

Question 22

Solar power application where it rely on heat energy coming from the sun.

Answer 22

Thermal or heat based application

Question 23

A solar application wherein it relies on the illumination-spectrum intensity coming from the sun.

Answer 23

Photovoltaic application

Question 24

A machine that convert the kinetic energy of the wind to mechanical power for pumping water

Answer 24

Wind pump

Question 25

A machine that converts wind kinetic energy into electrical energy using fast rotating rotor

Answer 25

Wind turbine

Question 26

Refers to all organic materials that originate from living organisms such as wood, agricultural residues, animal wastes and other.

Answer 26

Biomass

Question 27

Thermochemical conversion

Answer 27

* Gasification * Pyrolysis and carbonization * Combustion (cook stove)

Question 28

Biochemical Conversion

Answer 28

* Ethanol Production | * Biogas Production (Anaerobic digestion)

Question 29

Engine that burns fuel and air inside a combustion chamber located within the engine proper

Answer 29

ICE, internal combustion engine

Question 30

Confines the expanding gases and forms the combustion chamber

Answer 30

Cylinder blocks

Question 31

Forms a cover on one end of the cylinder

Answer 31

Cylinder head

Question 32

Covers the other end of the cylinder, slides inside the cylinder to transmit the force of expansion to the connecting rod and drives the crankshaft into rotary motion

Answer 32

Piston

Question 33

Effects a tight seal against the cylinder wall

Answer 33

Piston rings.

Question 34

Transmit the power of combustion from the piston to the crankshaft

Answer 34

Connecting rod

Question 35

Converts the reciprocating motion of the piston to rotary motion by means of a crank and twi bearing supports

Answer 35

Crankshaft

Question 36

Stores energy during the power stroke and returns this energy during the idle strokes producing a uniform rotatiib

Answer 36

Flywheel

Question 37

Open and close the ports leading into and out if the combustion chamber

Answer 37

Valve

Question 38

Produces the spark to initiate the ignition of the fuel and mixture

Answer 38

Spark plug

Question 39

Covers the crankshaft and holds the oil for the lubrication of the moving parts

Answer 39

Crankcase

Question 40

Actuates the valve through a rocker arm to open and close during engine operation

Answer 40

Camshaft

Question 41

Retain compression, reduce cylinder wall contact thereby reduce friction losses and wear

Answer 41

Piston rings (compression and oil rings)

Question 42

Joins the connecting rod and the piston

Answer 42

Piston pin

Question 43

Is where engine oil is container to lubricate the engine

Answer 43

Oil pan

Question 44

Used in measuring the level of lubricating oil at the engine

Answer 44

Dipstick

Question 45

It is where the camshaft located

Answer 45

Cylinder head

Question 46

Leakage of combustion gases between a piston and the cylinder wall into the crankcase in an automobile

Answer 46

Blowby

Question 47

Refers to the size of the opening of the cylinder which is almost equal to the diameter of the piston plus the rings

Answer 47

Bore

Question 48

Refers to the distance traveled by a piston from TDC to BDC

Answer 48

Stroke

Question 49

The volume displaced by a piston in one strike

Answer 49

Piston displacement

Question 50

The volume in the combustion cylinder when the piston is at the TDC piston

Answer 50

CV- Clearance Volume

Question 51

The ration if the total volume to the clearance volume

Answer 51

Compression Ratio, CR

Question 52

The amount of pressure generated during the power stroke of the engine

Answer 52

Mean effective pressure

Question 53

Equivalent to one complete rotation of the crankshaft

Answer 53

Revolution, 4 stroke, 1 stroke = 2 rev or to complete 1 cycle, it needs 2 revolution. 2 stroke, 1 stroke = 1 rev.

Question 54

Refers to the series of events occuring one after the other in a definite order and repeating the event after the last one has occurred

Answer 54

Cycle

Question 55

Power generated at the combustion chamber

Answer 55

IHP

Question 56

The power available at the drive shaft or the crankshaft

Answer 56

BHP

Question 57

Power loss due to friction of piston and other components of the engine

Answer 57

FHP

Question 58

The power if the engine as specified by the manufacturer

Answer 58

Rated horsepower

Question 59

The ration of the brake horsepower and the indicated horsepower

Answer 59

Mechanical efficiency

Question 60

The ratio of the brake horsepower to the power available at the fuel

Answer 60

Thermal eff.

Question 61

The rate of fuel consumed of an engine per unit BHP

Answer 61

SFC

Question 62

The min. speed of the engine at no load, usually runs at around 900 rpm

Answer 62

Idle speed

Question 63

The opening adjustment of the engine throttle at the best operating condition, which is usually 75% of the total opening

Answer 63

Optimum throttle opening

Question 64

Provides a passage to the intake valve porte in the head

Answer 64

Intake manifold

Question 65

Uses spark to ignite the fuel, uses gasoline and has a carburetor to mix fuel and air.

Answer 65

Spark-ignition engine

Question 66

Uses an automizer(fuel injector) to spray the fuel inside the engine

Answer 66

Compression - ignition engine

Question 67

The compression ratio of Compression engine ranges from

Answer 67

14-22:1

Question 68

The CR of SI ranges from 5-8:1

Question 69

A/F of CI is

Answer 69

15-100 to 1

Question 70

A/F for SI is____

Answer 70

12-15 to 1

Question 71

Fuel consumption og CI is

Answer 71

Low

Question 72

Fuel consumption of SI

Answer 72

High

Question 73

Starting characteristics of CI is

Answer 73

Hard

Question 74

Starting characteristics for SI is

Answer 74

Easy

Question 75

Produces power in one revolution of the crankshaft

Answer 75

2S cycle engine

Question 76

Usually high speed and light in weight

Answer 76

2S cycle engine

Question 77

Produces power in two revolutions of the crankshaft

Answer 77

4S cycle engine