Question 1

All overhead valve engines ________.&#10;A)Operate by the two-stroke cycle&#10;B)Use an overhead camshaft&#10;C)Use the camshaft to close the valves&#10;D)Have the valves located in the cylinder head

Accepted Answer

Overhead valve engines have their valves located in the cylinder head, which allows for more efficient airflow compared to engines where the valves are located in the block. This design is common in many modern engines, improving combustion efficiency and performance.

Question 2

An SOHC V8 engine has how many camshafts?&#10;A)One&#10;B)Two&#10;C)Three&#10;D)Four

Accepted Answer

An SOHC (Single Overhead Camshaft) V8 engine has one camshaft per bank of cylinders, totaling two camshafts. This is because a V8 engine is essentially two banks of four cylinders arranged in a V shape, and each bank requires its own camshaft to operate the valves.

Question 3

The coolant flow through the radiator is controlled by the ________.&#10;A)Cooling Fan(s)&#10;B)Water pump&#10;C)Thermostat&#10;D)Size of the passages in the block

Accepted Answer

The thermostat controls the coolant flow through the radiator by opening or closing at specific temperatures to regulate the engine's cooling system.

Question 4

In this drawing, which item is the camshaft?  &#10;A)A&#10;B)B&#10;C)C&#10;D)None of these

Accepted Answer

The answer of In this drawing, which item is the...

Question 5

The ratio of the volume of a cylinder with the piston at BDC to the volume of the cylinder with the piston at TDC is known as ________.&#10;A)Volume ratio&#10;B)Compression ratio&#10;C)Displacement&#10;D)None of these

Accepted Answer

The compression ratio is the ratio of the volume of a cylinder with the piston at Bottom Dead Center (BDC) to the volume of the cylinder with the piston at Top Dead Center (TDC), which is a crucial parameter in internal combustion engines.

Question 6

An 8 cylinder engine with a bore of 4.000 inches and a stroke of 3.000 inches has a displacement of ________.&#10;A)302 cubic inches&#10;B)226 cubic inches&#10;C)350 cubic inches&#10;D)383 cubic inches

Accepted Answer

The displacement of an engine can be calculated using the formula: Displacement = π/4 * Bore^2 * Stroke * Number of Cylinders. Plugging in the given values (Bore = 4 inches, Stroke = 3 inches, Number of Cylinders = 8), the calculation yields approximately 301.6 cubic inches, which rounds to 302 cubic inches.

Question 7

Which of the following is the most correct statement about the direction of engine rotation?&#10;A)Most engines rotate counter clockwise as viewed from the front of the engine.&#10;B)Most engines rotate counter clockwise as viewed from the non principal end of the engine.&#10;C)Most engines rotate clockwise as viewed from the front of the engine.&#10;D)Most engines rotate clockwise as viewed from the principal end of the engine.

Accepted Answer

Most engines, particularly those in conventional vehicles, rotate clockwise when viewed from the front. This is a standard convention for the design of many engines, especially in cars and light trucks.

Question 8

Which component is NOT needed in a typical overhead cam engine?&#10;A)Push rod&#10;B)Rocker arm&#10;C)Camshaft&#10;D)Valve spring

Accepted Answer

In an overhead cam engine, the camshaft is located in the cylinder head above the valves, eliminating the need for push rods. The camshaft directly actuates the valves, making push rods unnecessary.

Question 9

A rotating force is called ________.&#10;A)Combustion pressure&#10;B)Horsepower&#10;C)Eccentric movement&#10;D)Torque

Accepted Answer

Torque is the measure of the rotational force applied to an object, causing it to rotate around an axis.

Question 10

Which component listed below does NOT form part of the combustion chamber?&#10;A)Cylinder head&#10;B)Valve&#10;C)Piston&#10;D)Connecting rod

Accepted Answer

The connecting rod does not form part of the combustion chamber. It connects the piston to the crankshaft and transmits the motion and forces from the piston, but it is not part of the chamber where fuel combustion occurs.

Deck 18: Gasoline Engine Operation, Parts, and Specifications