Basic-Engineering-ANSWER-KEY.pdf

Basic Engineering: 20 items DIRECTIONS: For each of the following questions, select the best answer from among the given choices and blacken the appropriate space on your Answer Sheet. 1. When a gas is heated at constant pressure, what willhappento its volume? A Its volume will in...

Basic Engineering: 20 items DIRECTIONS: For each of the following questions, select the best answer from among the given choices and blacken the appropriate space on your Answer Sheet. 1. When a gas is heated at constant pressure, what willhappento its volume? A Its volume will increase B Its volume will decrease C Its volume will remain unchanged D Its volume will be comparable to the initial volume 2. What is the product of the mass of a body multiplied by its rate of acceleration? A B C D Momentum energy inertia velocity 3. The principle which states that “energy cannot be created nordestroyed,” is known as the. A The “zeroth law” of thermodynamics B First law of thermodynamics, “conservation of energy” C Second law of thermodynamics, “entropy” D Third law of thermodynamics, “ perpetual motion” 4. What mode of heat transfer does NOT require any physical contact between a warmerand a coolersubstance? A B C D Radiation Conduction Convection All of the options 5. Which of the following statements defineenergy? A Energy is work that has been accomplished B Energy is the capacity of a physical system to perform work C Energy is working being done D Energy is power delivered 6. It refers to the transfer of heat energy through the motion of heated fluid. A B C D Convection Conduction Radiation conduction and convection combined 7. A series of the same events repeated regularlyis referred to as. A B C D Revolution cycle rotation stroke 8. In diesel engine operation, the time period between fuelinjection and ignition is usuallydescribedas. A B C D Injection duration ignition timing pre-combustion lag ignition delay 9. What is the purpose of the piston ring clearance in diesel engines? A To allow the combustion gasesto press the ring down on the set B To allow the combustion gases get behind the ring and press it against the cylinder liner C To prevent the ring from buckling and breaking D To aid in the protection of oil film 10. In thermodynamics, what is known as the transfer of heat energy as it travels through space? A Radiation C Convection B Conduction D Combination of conduction and convection 11. Which of the following tasks must be done before starting adiesel engine? A Check the pyrometer readings B Check the crankcase oil level C Change the fuel oil strainers D Clean the air filter 12. What is referred to as “heart of the engine”? A B C D Piston Cylinder Crankcase Liner 13. What part of the engine transmits to the crankshaft the power developed by the burning of the fuel? A B C D Cylinder Piston Connecting rod Liner 14. What is defined as the distance traveled by the piston from one end of the cylinder to the other end? A B C D Length Stroke Compression Exhaust 15. The part of the engine that strokes kineticenergy that helps the starting process is the. A B C D Crankshaft Crankcase Flywheel Journal 16. It is defined as the part of the diesel engine that keeps the engine running at desired speed regardless of load. A B C D Turbo charger Governor Flywheel Fuel pump 17. Which of the following types of engine governors maintains the same speed from “no load” to “full load” conditions? A Variable-speedgovernors B Constant-speed governors C Speed-limit governors D Load-limiting governors 18. The differencebetween the pressure at apoint being measured and that of a perfect vacuum is known as. A B C D Internal pressure gauge pressure absolute pressure external pressure 19. The temperature at which watervaporin the atmosphere begins to condenseis called the. A dew point temperature B condensation temperature C psychometrictemperature D absolute humidity 20. The function of lubricating oil is to. A maintain even distribution of bearing wear B maintain constant oil temperature C maintain apressurized fluidfilmbetween moving surfaces D remove entrained water Basic Engineering ANSWERKEY 1. A 2. A 3. B 4. A 5. B 6. A 7. B 8. D 9. C 10. A 11. B 12. A 13. C 14. B 15. C 16. B 17. B 18. C 19. A 20. C