2. The gauge used to measure readings of pressure above or below atmospheric pressure is known as?
Barometer
Manometer
Pyrometer
Hydrometer

3. The pressure achieved when adding atmospheric pressure to a pressure gauge reading is known as?
Barometric pressure
Absolute pressure
Boost pressure
Both A & B

4. The pressure that measures the weight of the air that surrounds the earths surface is known as?
Barometric pressure
Absolute pressure
Atmospheric pressure
Both A & C

5. For calculations of pressure, volume and temperature of gasses it is necessary to use a temperature scale based on Absolute 0, this scale is known as?
Rankine
Bessemer
Cooper
Adiabatic

6. When gas is compressed in a cylinder where both cylinder and piston are so well insulated that no heat is transferred either to or from the gases the compression is termed as?
Rankine
Complete
Adiabatic
Absolute

7. The ratio of the maximum volume in an engine cylinder at bottom dead center to the minimum volume in the cylinder with the piston at top dead center is normally known as?
Piston ratio
Compression ratio
Cylinder ratio
Both A & B

8. The distance between top dead center and bottom dead center of an engine is known as?
Piston displacement
Cylinder volume
Stroke
Both A & C

9. The volume remaining above the piston at top dead center is known as?
Clearance volume
Dead space
Compression space
Both A & C

10. The ratio of the heat equivalent of work done in an engine to the total heat supplied in the same unit of time is refereed to as its?
Compression efficiency
Thermal efficiency
Mechanical efficiency
Absolute efficiency

11. The ratio of brake horsepower output of an engine to the indicated horsepower developed in the cylinders is called the ________________ of the engine?
Compression efficiency
Thermal efficiency
Mechanical efficiency
Absolute efficiency

12. In a 4 cycle engine the ratio of the volume of atmospheric air taken into a cylinder each cycle to a volume of atmospheric air equal to the piston displacement is known as?
Volumetric efficiency
Scavenging efficiency
Barometric efficiency
Atmospheric efficiency

13. In a 2 cycle engine the ratio of the volume of new air charge trapped in a cylinder to the total volume of air and exhaust gases in the cylinder at port-closing position is known as?
Volumetric efficiency
Scavenging efficiency
Barometric efficiency
Atmospheric efficiency

14. The instrument used to measure exhaust gas temperature consists of two dissimilar insulated wires that are joined together at each end to form a continuous circuit and is junctioned at one end to a millivolt meter is commonly refereed to as a?
Gas thermometer
Temperature readometer
Thermocouple Pyrometer
Exhaust tempmeter

15. One instrument used in checking exhaust smoke is known as?
Opacity meter
Smokeometer
Flow meter
Both A & C

16. The air system has which of the following functions?
Silencing of air noises
Cleaning the air
Atomizing the fuel
Both A & B

17. In what condition is air at the most desirable point for maximum output with good combustion?
Hot, dry air
Hot, humid air
Cool, dense air
Cool, humid air

18. When air is compressed ____________?
The temperature increases
It;s density is reduced
It is less efficient
All of the above

19. Anti-oxidants - anti-corrosives or catalyst "poisons" used as lubricant additives to prevent sludge and varnish formation on the engine parts and to prevent corrosion in general are known as?
Detergents
Inhibitors
Dispersants
All of the above

20. Lubricant additives that aid in keeping the insoluble oxidation products suspension, thus preventing formation of sludge and deposits are known as?
Detergents
Inhibitors
Dispersants
All of the above

21. Removing abrasive particles and sludge-producing contaminants from the oil when the oil is rotated in a small cylinder at a very high velocity is called?
Absorbent filtering
Adsorbent filtering
Centrifugal filtering
mechanical straining

22. Filters that hold, in a very thin layer, by adhesion, the molecules of dissolved substances, or of liquids, to the surface of the solid filtering material are known as?
Absorbent filters
Adsorbent filters
Centrifugal filters
None of the above

23. Pitting that occurs due to formation of vapor bubbles and their subsequent violent collapse is known as?
Cavitation
Corrosion
Ebullition
Both A & C

24. The speed variation from no load to full load is known as?
Speed drift
Speed droop
Torque backup
Both A & B

25. If a governor maintains constant engine speed independent of the load being carried it is said to be?
Stable governing
Centrifugal governing
Isochronous governing
Both B & C

Score =
Correct answers: