ASME ASME Mechanical Power Transmission 1

Question 1

Which ASME standard covers the design of spur and helical gears for general industrial use?

Accepted Answer

ASME B6.1

Answer

ASME B6.1 covers the specification of spur and helical gear tooth form, proportions, and accuracy for industrial applications.

Question 2

In mechanical power transmission, what is the 'pitch circle' of a gear?

Accepted Answer

The circle passing through the teeth contact point during meshing

Answer

The pitch circle is the imaginary circle that passes through the point of contact between meshing gear teeth, used as the reference for gear calculations.

Question 3

What is the 'diametral pitch' of a gear?

Accepted Answer

The number of teeth per inch of pitch diameter

Answer

Diametral pitch (DP) is the number of teeth per inch of pitch diameter, the fundamental sizing parameter for US customary gears.

Question 4

For two gears to mesh correctly, which parameter must be equal for both gears?

Accepted Answer

Pressure angle and diametral pitch (or module)

Answer

Meshing gears must have equal pressure angles and equal diametral pitch (or module in metric) to ensure correct tooth contact geometry.

Question 5

In AGMA/ASME gear design, what does the 'service factor' (KS or Ko) account for?

Accepted Answer

Overloads and shock loads beyond the nominal transmitted power

Answer

The service (overload) factor accounts for shock and overload above the nominal design power, multiplying the required load capacity accordingly.

ASME - American Society of Mechanical Engineers Practice Test

ASME - American Society of Mechanical Engineers Practice Test

ASME ASME Mechanical Power Transmission 1