Variable Intake Manifolds Are Being Discussed

question 1

Multiple Choice

Variable intake manifolds are being discussed. Technician A says an intake manifold tuning (IMT) system uses a butterfly valve to divide the plenum into two small chambers at low speeds. At high engine speeds, the butterfly valve opens to form one large plenum chamber. Technician B says the intake manifold runner control (IMRC) system changes the path of air between long and short runners or between small-diameter and large-diameter runners according to engine speed. Who is correct?

• A)A only
• B)B only
• C)both A and B
• D)neither A nor B

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Definitions:

Manufacturing Cost

All expenses directly related to the production of goods, including raw materials, labor, and factory overhead.

Machine-Hours

A measure of production time, indicating the total hours that machines are operating in the manufacturing process.

Manufacturing Overhead

The indirect factory-related costs that are incurred when producing a product, including costs related to management, utilities, and equipment depreciation.

Direct Labor-Hours

The total hours worked by employees who are directly involved in the manufacturing process and whose work can be easily traced to the product.