Gears Objective Questions and Answers - Set 05 - ObjectiveBooks

Gears Objective Questions and Answers - Set 05

Practice Test: Question Set - 05


1. All dimensions for a standard gear system can be defined in terms of,
    (A) Module and number of teeth 
    (B) Pressure angle and number of teeth 
    (C) Module
    (D) Circular and diametral pitch

2. The curve traced by a point on a line as it rolls on a circle is called
    (A) Cycloid
    (B) Epicycloid
    (C) Involute
    (D) Hypocycloid

3. Spur gears used for machine tool gearboxes must have the contact ratio
    (A) Equal to 1
    (B) Less than 1
    (C) More than 1.4
    (D) Equal to 2

4. The pitch circle diameter and number of teeth in a spur gear are d’ and z respectively. The module m is defined as
    (A) πd’/z
    (B) z/d
    (C) d’/z
    (D) dz

5. Which of the following gear ratios does not require hunting tooth?
    (A) 52:26
    (B) 48:24
    (C) 50:25
    (D) 51:25

6. In case of spur gears, Lewis form factor depends upon
    (A) Module
    (B) Number of teeth
    (C) Pressure angle
    (D) Both (B) and (C)

7. Permissible bending stress for gear tooth is usually taken as
    (A) One third of ultimate tensile strength
    (B) One half of ultimate tensile strength
    (C) One third of tensile yield strength
    (D) One third of surface endurance strength

8. Wear strength of gear tooth should be
    (A) Less than effective load consisting of static and dynamic load
    (B) More than effective load consisting of static and dynamic load
    (C) More than wear strength of gear tooth
    (D) More than load due to power transmission

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