WorksheetsFARM POWER 2
Total questions: 20
Worksheet time: 30mins
Estimate the actual power output in kW for reservoir located 30 meters above the power generating station. The pipe used to generate power has a diameter of 2 meters and the velocity of water flowing through the duct is 8 m/sec. The system efficiency is 70%.
5174
7391
7.4
5.2
A machine which was originally driven by 1.0 hp electric motor, will be run using horizontal axis two-bladed windmill. If the wind speed in the area is 15 kph, what should b the diameter of the windmill in meters? Use an overall systems efficiency of 27.5%, air density of 1.2 kg/m3.
15
105
47.7
11.5
What comprises synthesis gas or producer gas?
CH4 and H2
CO and H2
H2 and O2
CO2 and H2
It is a thermal process done in the absence of oxidant. It is also called destructive distillation.
destruction
gasification
combustion
pyrolysis
It is an instrument used to measure diffuse and direct solar radiation.
pyranometer
pyrometer
pytheliometer
Campbell-Stokes sunshine recorder
What is the main combustible gas component of biogas?
H2
CO2
CH4
N2
It is the device that converts solar radiation directly into electrical energy.
soleil
silicon
semiconductor
photovoltaic cells
If mechanical work is done at a rate of 1 ft-lb/sec, what is its equivalent in watts?
43.7
0.74
746
1.36
A four cylinder four-stroke cycle engine with 3 by 4 inches cylinder develops 19 hp at 1650 rpm. Compute the IHP if the mechanical efficiency is 85%
16.2
22.4
7.45
26.4
It converts the reciprocating motion of the piston to rotary motion.
crankshaft
flywheel
connecting rod
cylinder
A 4-cylinder 100mm by 100mm engine turns at 1600rpm. If the individual cylinder's clearance volume is 130 cm3, what is the engine's compression ratio?
8:1
9:1
10:1
7:1
This vertical axis windmill has a tip speed ratio between 4 and 8 and a power coefficient that can reach up to a range of 0.2 to 0.4.
savonious
cretan
darrieus
multibladed
A mechanical breaking up of fuel into spray droplets by high velocity of air passing through a jet.
lubrication
ionization
atomization
carburetion
What is the indicated horsepower of a four-stroke, six cylinder engine having 4" bore and 4" stroke running at 1500 rpm and mean effective pressure of 80psi?
35 hp
45 hp
52 hp
41 hp
A 2-stroke cycle 3" by 4" engine with a clearance volume of 5 in3 is a ___.
gasoline engine
diesel engine
external combustion engine
turbocharged engine
It is one of the simplest wind turbines. Aerodynamically, it is a drag-type device. It usually rotates in a vertical axis and has an S-shape cross section.
Darrieus
Savonius
Cretan
Multi bladed
A fuel-air mixture containing a low percentage of fuel and high percentage of air, as compared to a normal fuel-air mixture.
poor mixture
ideal mixture
lean mixture
adequate mixture
What is the theoretical wind power of air blowng at a speed of 4m/s if the swept diameter of a windmill is 4m?
50 W
0.25 kW
18 W
NOTA
A carabao pulls a horizontal load of 50 kg at an average speed of 3 km/hr. How much approximate power is being exerted by the carabao?
0.40 hp
0.35 kW
0.55 hp
0.44 kW
The power unit for driving centrifugal pumps for household use is usually a/an ___.
electric motor
gasoline engine
diesel engine
kerosene engine
