Belonio Flashcards
An engine that burns fuel inside the
cylinder.
a. External combustion engine
b. Internal combustion engine
c. Sterling engine
d. None of the above
Answer – internal
combustion engine
Part of engine that which slides up and
down the cylinder and transmits power
to the crankshaft.
a. Connecting rod
b. Cylinder block
c. Piston
d. Spark plug
Answer - Piston
Amount of power that the manufacturer specified for an engine.
a. Indicated horsepower
b. Brake horsepower
c. Rated horsepower
d. Belt horsepower
Answer – Rated Horsepower
Distance of movement piston from
the top dead to the bottom dead
center.
a. Stroke
b. Bore
c. Valve clearance
d. None of the Above
Stroke
Reduction of engine speed or flow
of fuel.
a. Throttling
b. Clutching
c. Atomization
d. None of the above
Answer - Throttling
A device which uses fluid power to
produce mechanical force and
motion.
a. Governor
b. Accumulator
c. Actuator
d. None of the above
Answer - Actuator
A mechanical breaking up of fuel
into spray droplets by high velocity
of air passing through a jet.
a. Atomization
b. Carburetion
c. Turbo charging
d. None of the above
Answer - Atomization
A device that is used to actuate the
throttle of an engine to increase its
speed.
a. Governor
b. Accelerator
c. Actuator
d. None of the above
Answer - Accelerator
Usable power delivered by the
engine
a. Indicated horsepower
b. Brake horsepower
c. Rated horsepower
d. None of the above
Answer – Brake horsepower
A device that meter the fuel air and
mixes them into harmonious
mixture before the mixture enters
the combustion chamber of an
engine.
a. Governor
b. Air injector
c. Carburetor
d. All of the above
Answer- Carburetor
A device that permits the flow of
fuel and of burned gases in one
direction only.
a. Check valve
b. Relief valve
c. Spark plug
d. None of the above
Answer – Check valve
An internal combustion engine that
produces power in one revolution
of the crankshaft.
a. Four stroke cycle engine
b. Two stroke cycle engine
c. Rotary engine
d. None of the above
Answer – Two stroke cycle
A device that provides ignition to a
gasoline engine.
a. Flywheel
b. Fuel injector
c. Carburetor
d. Spark plug
e. None of the above
Answer – Spark plug
During the power stroke, which of
the following valve is open?
a. Intake
b. Exhaust
c. Intake and exhaust
d. None of the above
Answer – None of the above
Number of spark plugs for 6
cylinder diesel engine
a. 6
b. 12
c. 4
d. None of the above
Answer – None of the above
The volume displaced by a piston
in making upward and downward
stroke.
a. Piston displacement volume
b. Clearance volume
c. Total volume
d. None of the above
Answer – Piston displacement volume
At the downward stroke of two-stroke
cycle, which of the events are taking
place.
a. Power & intake
b. Compression & exhaust
c. Power and exhaust
d. None of the above
NOTA
The ratio of the clearance volume
from the total volume.
a. Compression ratio
b. Air fuel ratio
c. Bore stroke ratio
d. None of the above
Answer – Compression Ratio
Power transmitted to the pistons by
the gas in the cylinder
a. Brake horsepower
b. Indicated horsepower
c. Drawbar horsepower
d. Flywheel horsepower
Answer – Indicated horsepower
Suppose a 4-cylinder engine has a
bore of 3.5 in. and a stroke of 4.0
in., what is the engine
displacement.
a. 154 in3
b. 175 in3
c. 225 in3
d. None of the above
Answer – 154 in3
An engine has piston displacement
of 38.4 in3
. If the clearance volume
of the cylinder is 2.5 in3
, what is the
compression ratio?
a. 1:12
b. 1:16
c. 1:8
d. None of the above
Answer – 1:16
Number of explosion of piston on a
single cylinder, four stroke cycle
engine in 100 revolution of the
crankshaft.
a. 100
b. 50
c. 25
d. None of the above
Answer – 50 explosions
A device that connects and
disconnects power input to the
power output.
a. Clutch
b. Gear
c. Pulley
d. None of the above
Answer – Clutch
The space when the piston is at the
top dead center
a. Piston displacement volume
b. Clearance volume
c. Total volume
d. None of the above
Answer – Clearance volume
How many piston strokes are there
in one revolution of a crankshaft.
a. One
b. Two
c. Four
d. None of the above
Answer - Two
Engine having fuel injected into the
combustion chamber near the end
of the combustion stroke and is
ignited by heat of compression
only.
a. Gasoline engine
b. Diesel engine
c. Steam engine
d. None of the above
Answer - Diesel
Number of times the exhaust valve
opens in 2-stroke cycle engine
running at 2000 rpm.
a. 1000
b. 2000
c. 1500
d. None of the above
Answer – None of the above
What is the indicated horsepower, of a
four-stroke, six-cylinder engine having
a 4” bore and 4” stroke. The engine
speed is 1500 rpm and the mean
effective pressure is 80 psi
Answer – 45 hp
The sequence by which the
cylinder delivers the power stroke.
a. Ignition
b. Firing order
c. Flash point
d. None of the above
Answer – Firing order
Engine that burns fuel outside the
cylinder.
a. Spark ignition engine
b. External combustion engine
c. Compression ignition engine
d. None of the above
Answer – External combustion engine
At the intake stroke of a diesel
engine, what come in?
a. Fuel and air
b. Fuel
c. Air
d. None of the above
Answer - Air
A device that creates ignition of fuel
in a diesel engine.
a. Spark plug
b. Piston
c. Carburetor
d. None of the above
Answer - Piston
Two pistons running at the same
time in the same direction but
performing different strokes.
a. Running mate
b. Firing order
c. Valve timing
d. None of the above
Answer – Running mate
How many times the intake valve
opens in 4 stroke-cycle engine
running at 2000 rpm.
Answer – 1000 times
Two-stroke six-cylinder-internal-combustion
engine has a cylinder bore of 4 inches and a
stroke of 4 inches. If the engine is running
at a speed of 1500 rpm, what is the
indicated horsepower of the engine? The
mean effective stroke is 80 psi.
Answer – 92 hp
Firing order of 4-cylinder engine.
a. 1-2-3-4
b. 1-3-4-2
c. 1-2-4-3
d. None of the above
Answer – 1-3-4-2
A device which connects or
disconnects engine crankshaft to
the transmission box or driven
machine.
a. Differential gear
b. Clutch
c. Actuator
d. None of the above
Answer: Clutch
Firing order for 8-cylinder V piston
a. 1-6-8-4-3-2-7-5
b. 1-8-7-3-6-5-4-2
c. All of the above
d. None of the above
Answer – All of the above
Engine mechanical efficiency.
a. Brake hp over indicated hp
b. Rated hp over indicated hp
c. Friction hp over flywheel hp
d. None of the above
Answer – Brake horsepower over indicated
horsepower
Number of times the intake valve
opens in a single-cylinder fourstroke
cycle after completing 200
revolutions.
a. 200
b. 100
c. 50
d. None of the above
Answer – 100 times
What is the mechanical efficiency
of an engine having a brake
horsepower of 8 hp and an
indicated horsepower of 10 hp?
a. 20%
b. 40%
c. 60%
d. 80%
e. None of the above
Answer – 80%
Part of an engine that converts
reciprocating motion into rotary
motion.
a. Crankshaft
b. Piston
c. Camshaft
d. None of the above
Answer - Crankshaft
Engine system that reduces the
temperature of the cylinder.
a. Ignition System
b. Carburetor System
c. Cooling System
d. None of the above
Answer – Cooling System
System of number indicating the
ignition quality of diesel fuel.
a. Octane rating
b. Cetane rating
c. Fuel index
d. None of the above
Answer – Cetane rating
Twenty-hp engine is equal to.
a. 1524.44 kg-m/sec
b. 1254.2 kg-m/sec
c. 1425.44 kg-m/sec
d. None of the above
Answer – 1524.44 kg-m/sec
Ten-hp engine is equivalent to
a. 7.46 kw
b. 76.4 watt
c. 0.746 kw
d. None of the above
Answer – 7.46 kW
A substance that decreases the
effect of friction and which is
commonly obtained from petroleum
products.
a. Lubricant
b. Gear oil
c. Grease
d. All of the above
Answer – All of the above
Gear oil is used for
a. Engine
b. Transmission box
c. Hydraulic system
d. All of the above
Answer – Transmission Box
Mean effective pressure for turbocharge
engine.
a. 300 psi
b. 200 psi
c. 400 psi
d. None of the above
Answer – 300 psi
Engine valve that allows the
entrance of fuel.
a. Exhaust valve
b. Intake valve
c. Check valve
d. None of the above
Answer – Intake valve
If the compression ratio is 1:17, the
piston displacement volume for 10
cm3 piston clearance volume is
a. 160 cc
b. 170 cc
c. 200 cc
d. None of the above
Answer – 160 cm3
Standard throttling adjustment of
an engine.
a. 1/3
b. ½
c. ¾
d. None of the above
Answer – 3/4
Mean effective pressure of an
engine.
a. 120 psi
b. 200 psi
c. 50 psi
d. None of the above
Answer – 120 psi
Number of pistons for 6 cylinder
four stroke gasoline engine.
a. 3
b. 6
c. 9
d. None of the above
Answer – 6 pistons
Fuel for compression ignition
engine.
a. Gasoline
b. Kerosene
c. LPG
d. None of the above
Answer – None of the above
DIESEL-
A term used to describe the
resistance of oil to flow.
a. Viscosity
b. Cetane Number
c. Volume weight
d. None of the above
Answer - Viscosity
The speed of the engine is
automatically regulated by.
a. Hand lever
b. Governor
c. Flywheel
d. None of the above
Answer - Governor
Ignition timing for gasoline engine.
a. 1-5 deg
b. 5-10 deg
c. 10-15 deg
d. None of the above
Answer – 5 to 10
Ignition timing for diesel engine.
a. 5-12 deg
b. 17-19 deg
c. 20-26 deg
d. None of the above
Answer – 17-19 deg
A type of engine that completes
power stroke in two revolution of
the crankshaft.
a. Four-stroke cycle engine
b. Two-stroke cycle engine
c. All of the above
d. None of the above
Answer – four strokes cycle engine
A type of engine that completes
power stroke in one revolution of
the crankshaft.
a. Four-stroke cycle
b. Two-stroke cycle
c. All of the above
d. None of the above
Answer – two stroke cycle engine
An engine that produce more
power per unit weight.
a. Four-stroke cycle
b. Two-stroke cycle
c. All of the above
d. None of the above
Answer – two-stroke
An engine which uses oil entirely
as lubricant.
a. Four-stroke cycle
b. Two-stroke cycle
c. All of the above
d. None of the above
Answer – fours storke
One horsepower can generate heat
energy equal to
a. 2455 BTU/hr
b. 2545 BTU/hr
c. 2445 BTU/hr
d. None of the above
Answer – 2545 BTU/h
An engine basically has
a. Larger cylinder diameter than piston diameter
b. Equal piston diameter than cylinder diameter
c. Larger piston diameter than cylinder diameter
d. None of the above
Answer: Larger cylinder diameter than piston
diameter
A part of an engine which reduces
vibration and stores energy.
a. Spark plug
b. Flywheel
c. Piston
d. None of the above
Answer - Flywheel
If a 4-cylinder, 2-stroke-cycle
internal-combustion engine has
600 explosion per minute, what is
the engine rpm.
a. 125 rpm
b. 150 rpm
c. 200 rpm
d. None of the above
Answer – 150 rpm
Considering that the engine in item
above has a piston diameter of 4” and
piston stroke of 5”, what is the indicated
horsepower of the engine assuming a
mean effective pressure of 102 psi.
a. 9.7 hp
b. 53.3 hp
c. 28.5 hp
d. None of the above
Answer – 9.7 hp
What is the brake horsepower of
the engine in item above if the
mechanical efficiency is 80 percent.
a. 8 hp
b. 31 hp
c. 35 hp
d. None of the above
Answer – 8 hp
The indicated power of an engine is
69 horsepower. The brake
horsepower is 54. What is the
mechanical of engine efficiency?
a. 69 %
b. 78 %
c. 59 %
d. None of the above
Answer – 78%
What is the thermal efficiency of an
engine which uses 0.6-lb of fuel per
horsepower-hr. The fuel contain
20,000 BTU/lb.
a. 21.2 %
b. 34.5 %
c. 46.8 %
d. None of the above
Answer – 21.2%
The brake constant is
a. 2 π R/c
b. 2 π RN
c. 2 π RFn/c
d. None of the above
Answer – 2piR/c
What is the brake constant value of
dynamometer whose length of arm
is equal to 1m?
a. 0.082 sec/kg
b. 0.82 sec/kg
c. 2.8 sec/kg
d. None of the above
Answer – 0.082 sec/kg
A diesel engine four-stroke cycle with three
cylinder has a cylinder bore of 89 mm and a
stroke of 130 mm. The compression ratio is
16:1 and running at a speed of 2000 rpm.
What is the piston displacement of the
engine per cylinder?
a. 809 cc
b. 1320 cc
c. 650 cc
d. None of the above
Answer – 809 cc
What is the total power stroke per
minute of the piston in item above?
a. 2000
b. 3000
c. 500
d. None of the above
Answer: 3000 power stroke per min
In item above, what is the total
displacement volume of the engine
per min?
a. 9708 l/min
b. 8534 l/min
c. 9578 l/min
d. None of the above
Answer – 9780 m/min
In item above, what is the piston
speed of the engine?
a. 520 m/min
b. 660 m/min
c. 743 m/min
d. None of the above
Answer – 520 m/min
In item above, what is the stroketo-bore
ratio of the engine?
a. 1.00
b. 1.32
c. 1.46
d. None of the above
Answer – 1.46
A four-cylinder gasoline engine has a
cylinder diameter of 20 cm and a stroke of
40 cm. The cylinders run at a speed of 150
rpm. The engine is a four-stroke cycle with
a mean effective pressure of 8 kg/cm2
.
What is the area of the piston?
a. 314 cm2
b. 284 cm2
c. 167 cm2
d. None of the above
Answer – 314 cm2
What is the length of stroke of the
engine piston in meter in item
above?
a. 0.40
b. 0.20
c. 0.8
d. None of the above
Answer – 0.40 m
What is the power stroke of the
engine per cylinder in item above?
a. 50
b. 75 power stroke per min-cylinder
c. 100
d. None of the above
Answer – 75 power stroke per min-cylinder
What is the total power stroke of
the engine in item above?
a. 150
b. 300
c. 75
d. None of the above
Answer - 300
What is the indicated horsepower
of the engine?
a. 46 hp
b. 66 hp
c. 56 hp
d. None of the above
Answer – 66 hp
If the engine mechanical efficiency,
in item above, is 80 %, what is the
brake horsepower of the engine?
a. 53 hp
b. 35 hp
c. 65 hp
d. None of the above
Answer – 53 hp
What is the stroke-to-bore ratio of
the engine in item above?
a. 2.0
b. 1.6
c. 2.4
d. None of the above
Answer – 2.0
If a two-stroke 4-cylinder engine is
running at 2000 rpm, the power
stroke per minute of the engine is
a. 4000
b. 8000
c. 2000
d. None of the above
Answer – 2000 strokes per min
Power available on human for
useful work.
a. 0.1 hp
b. 0.5 hp
c. 0.3 hp
d. None of the above
Answer – 0.1 hp
Domesticated animals used as
power for agriculture.
a. Dairy animals
b. Draft animals
c. Game animals
d. None of the above
Answer – Draft animals
A person is doing a work for 4
hours, what is the power developed
by the person?
a. 0.09 hp
b. 0.13 hp
c. 0.15 hp
d. None of the above
Answer – 0.13 h
Conversion of solid into
combustible carbon monoxide
through thermo-chemical reaction.
a. Digestion
b. Carbonization
c. Gasification
d. Pyrolysis
Answer - Gasification
Power generated from moving air.
a. Wind power
b. Hydropower
c. Photovoltaic cell
d. None of the above
Answer - Windpower
A gas produces putrefactive bacteria
that breaks down organic material
under airless condition consisting
mainly of methane and carbon dioxide.
a. Biofuel
b. Biogas
c. Gasifier
d. LPG
Answer - biogas
Wind is moving at 4 meters per
second. If the rotor area is 2
square meters, what is the wind
power?
a. 80 watts
b. 125 watts
c. 95 watts
d. None of the above
Answer – 80 watts
Average power density of solar
heat striking the earth surface.
a. 1 kw/m2
b. 0.89 kw/m2
c. 0.58 kw/m2
d. None of the above
Answer – 0.89 kW/m2
One hundred liters per second of water
is falling at a head of 10 meters. The
turbine efficiency is 80%. What is the
hydraulic power of the hydro system?
a. 8.7 kw
b. 87 kw
c. 7.8 kw
d. None of the above
Answer – 7.8 kW
A device that converts kinetic
energy of the wind to mechanical
power.
a. Rotor
b. Generator
c. Motor
d. None of the above
Answer - Rotor
A device that converts electricity to
mechanical power.
a. Rotor
b. Generator
c. Motor
d. None of the above
Answer - Motor
A device that converts electricity
from sunlight.
a. Windpump
b. Photovoltaic
c. Generator
d. None of the above
Answer - Photovoltaic
Wind machine that is used for lifting
water.
a. Aerogenerator
b. Wind turbine
c. WIndpump
d. None of the above
Answer - windpump
Power generated from a falling
water.
a. Hydro power
b. Biomass power
c. Wind power
d. None of the above
Answer – hydro power
