Week #1 - Fundamentals of Electricity Flashcards
Who invented the first heat engine?
Hero
Which of the following properly describes the first heat engine?
a. Internal combustion b. Reaction turbine c. Two-stroke cycle d. Four-stroke cycle
Reaction turbine
Who invented the term horsepower?
Watt
Who built the world’s first useful steam engine?
Savery
Who designed the first centrifugal governor?
Watt
In what year did Diesel patent his compression ignition engine?
1892
Who patented the first high-pressure liquid fuel injection pump for a diesel engine?
Bosch
Who is known as the “father of the highway diesel engine”?
Cummins
What are the U.S. inventors Eckert and Mauchly known for?
The first electronic digital computer
The world’s first automobile was built by who?
Cugnot
Calculate the brake power of an engine producing 1,150 lb-ft. of torque at the flywheel when it is turning at 2,000 rpm.
438 BPH
Use the PLANC formula to calculate the indicated power of a six-cylinder, fourstroke cycle engine run at 1,800 rpm using the following data:
Stroke: 6.0 inches
Bore: 5.5 inches
MEP: 220 psi
428 BHP
Which of the following is required to produce peak torque in a diesel engine?
a. Peak volumetric efficiency b. Peak mechanical efficiency c. Peak brake power d. Peak cylinder pressure
Peak cylinder pressure
In most hydromechanical fuel systems, when maximum engine rpm is increased, the engine brake power potential will also increase. True or False?
True
Which of the following statements helps explain why an engine develops peak brake power at a higher rpm than peak torque?
a. Volumetric efficiency is better at high rpm b. There is more time for combustion c. More power strokes per second occur d. Cylinder pressures are highest
More power strokes per second occur
Which of the following is true of an engine described as having high torque rise when comparing it with its standard version with the same nominal rated power?
a. It will provide a wider operating rpm range b. It will be more fuel efficient c. It will produce higher brake power d. It will have a higher maximum speed
It will provide a wider operating rpm range
A group of cyclists all weighing 175 lbs (80 kg) and riding on bicycles of equal weight ride a 6.4-mile (10-kilometer) race and all finish it. Which of the cyclists has performed the most work?
a. The winner b. The loser c. All have performed equal work
All have performed equal work
Usable power at the flywheel of an engine is know as what?
Brake power
When engine power is calculated rather than tested, it is know as what?
Indicated power
Which of the following expresses 1 HP correctly?
a. 550 lb-ft. of work per second b. 5,252 lb-ft. of work per minute c. 33,000 lb-ft. of work per second
550 lb-ft. of work per second
Convert a torque value of 25 lb-ft. into Newton-meters
33.9
A Cummins ISX 11.9 liter engine, programmed to 330 HP, produces a peak torque value of 1,350 lv-ft. at 1,300 rpm. Convert the torque value to Newton-meters.
1,830 N.m
A Detroit Diesel DD16 is rated at 600 HP. Express this in kilowatts.
448 kW
A Navistar MaxxForce 13 produces 355 kW of power at 1,800 rpm. Convert the kW to an HP value.
475 HP
When comparing truck engine brake power measured at the flywheel to that measured at the drive wheels, which one of the following should be true about brake power?
a. There is no difference if the transmission and drive carrier are functioning properly.
b. Power at the flywheel exceeds that at the drive wheels by 20% to 25%
c. Power at the wheels exceeds that at the flywheel by 10% to 25%
d. Power can only be measured at the drive wheels
Power at the flywheel exceeds that at the drive wheels by 20% to 25%
