Explore topic-wise MCQs in Theory Machines.

This section includes 19 Mcqs, each offering curated multiple-choice questions to sharpen your Theory Machines knowledge and support exam preparation. Choose a topic below to get started.

1.

Two involute gears in a mesh have path of approach = 29.83 mm and path of recess = 21.09 mm. The larger gear has 40 teeth and the pinion has 12 teeth. Find the ratio of the sliding to rolling velocity at the:i) beginning of contactii) end of contactiii) pitch pointr = 72 mm

A. 0.38, 0.54, 0
B. 0.54, 0.38, 0
C. 0.24, 0.63, 0
D. 0.63, 0.24, 0
Answer» C. 0.24, 0.63, 0
Discussion
2.

What is the formula for rolling velocity?

A. ωp x r
B. ωg x R
C. 0
D. ωg x r
Answer» B. ωg x R
Discussion
3.

The angular velocity of the pinion is 150 rpm and that of the gear is 75 rpm. The number of teeth on the pinion is equal to 20 and the module = 6 mm. The value of addendum is equal to 1 module. The pressure angle between the two gears is 20°. Find the velocity of sliding at the end of the contact.

A. 591.29 mm/s
B. 601.12 mm/s
C. 324.87mm/s
D. 512.02 mm/s
Answer» D. 512.02 mm/s
Discussion
4.

The angular velocity of the pinion is 75 rpm and that of the gear is 25 rpm. The addendum radius is 45 mm for the pinion and the radius of the pinion is 40 mm. The pressure angle between the gears is 25°. Find the velocity of sliding at the end of the contact.

A. 89.92 mm/s
B. 91.01 mm/s
C. 94.29 mm/s
D. 97.77 mm/s
Answer» E.
Discussion
5.

The angular velocity of the pinion is 325 rpm and that of the gear is 155 rpm. The number of teeth on the larger wheel is 60 and the module is equal to 7 mm. Addendum is 1.1 times the module. The pressure angle is 20°. Find the velocity of sliding at the beginning of the contact.

A. 1010.858 mm/s
B. 1317.858 mm/s
C. 1217.858 mm/s
D. 1117.858 mm/s
Answer» B. 1317.858 mm/s
Discussion
6.

The angular velocity of the pinion is 200 rpm and that of the gear is 50 rpm. The maximum addendum radius of the larger wheel is 85 mm and the radius of the gear is equal to 75 mm. The pressure angle between the gears is equal to 30°. Find the velocity of sliding at the beginning of the contact.

A. 1289.129 mm/s
B. 732.324 mm/s
C. 453.681 mm/s
D. 239.238 mm/s
Answer» D. 239.238 mm/s
Discussion
7.

Velocity of sliding at the pitch point = (ωp + ωg) x _____________

A. path of contact
B. 0
C. arc of approach
D. path of recess
Answer» C. arc of approach
Discussion
8.

Velocity of sliding at the beginning of engagement of the two gears = (ωp + ωg) x ______________

A. path of contact
B. arc of contact
C. arc of approach
D. path of approach
Answer» E.
Discussion
9.

THE_ANGULAR_VELOCITY_OF_THE_PINION_IS_150_RPM_AND_THAT_OF_THE_GEAR_IS_75_RPM._THE_NUMBER_OF_TEETH_ON_THE_PINION_IS_EQUAL_TO_20_AND_THE_MODULE_=_6_MM._THE_VALUE_OF_ADDENDUM_IS_EQUAL_TO_1_MODULE._THE_PRESSURE_ANGLE_BETWEEN_THE_TWO_GEARS_IS_20¬¨ àû._FIND_THE_VELOCITY_OF_SLIDING_AT_THE_END_OF_THE_CONTACT.?$#

A. 591.29 mm/s
B. 601.12 mm/s
C. 324.87mm/s
D. 512.02 mm/s
Answer» D. 512.02 mm/s
Discussion
10.

Two involute gears in a mesh have path of approach = 29.83 mm and path of recess = 21.09 mm. The larger gear has 40 teeth and the pinion has 12 teeth. Find the ratio of the sliding to rolling velocity at the:$

A. beginning of contact
B. end of contact
C. pitch point
Answer» C. pitch point
Discussion
11.

What_is_the_formula_for_rolling_velocity?$

A. ω<sub>p</sub> x r
B. ω<sub>g</sub> x R
C. 0
D. ω<sub>g</sub> x r
Answer» B. ‚âà√¨‚àö¬¢<sub>g</sub> x R
Discussion
12.

The angular velocity of the pinion is 75 rpm and that of the gear is 25 rpm. The addendum radius is 45 mm for the pinion and the radius of the pinion is 40 mm. The pressure angle between the gears is 25°. Find the velocity of sliding at the end of the contact?#

A. 89.92 mm/s
B. 91.01 mm/s
C. 94.29 mm/s
D. 97.77 mm/s
Answer» E.
Discussion
13.

The angular velocity of the pinion is 325 rpm and that of the gear is 155 rpm. The number of teeth on the larger wheel is 60 and the module is equal to 7 mm. Addendum is 1.1 times the module. The pressure angle is 20°. Find the velocity of sliding at the beginning of the contact.$

A. 1010.858 mm/s
B. 1317.858 mm/s
C. 1217.858 mm/s
D. 1117.858 mm/s
Answer» B. 1317.858 mm/s
Discussion
14.

The angular velocity of the pinion is 200 rpm and that of the gear is 50 rpm. The maximum addendum radius of the larger wheel is 85 mm and the radius of the gear is equal to 75 mm. The pressure angle between the gears is equal to 30°. Find the velocity of sliding at the beginning of the contact.$

A. 1289.129 mm/s
B. 732.324 mm/s
C. 453.681 mm/s
D. 239.238 mm/s
Answer» D. 239.238 mm/s
Discussion
15.

The angular velocity of the pinion is 100 rpm and that of the gear is 30 rpm. The path of recess is equal to 50 mm and the path of contact = 100 mm. Find the velocity of sliding at the beginning of the contact.

A. 1033.29 mm/s
B. 902.93 mm/s
C. 394.02 mm/s
D. 680.58 mm/s
Answer» E.
Discussion
16.

The angular velocity of the pinion is 40 rad/s and that of the gear is 12 rad/s. The path of recess is equal to 16 mm. Find the velocity of sliding at the end of the contact.

A. 832 mm/s
B. 213 mm/s
C. 1029 mm/s
D. 720 mm/s
Answer» B. 213 mm/s
Discussion
17.

The angular velocity of the pinion is 25 rad/s and that of the gear is 10 rad/s. The path of approach is equal to 15 mm. Find the velocity of sliding at the beginning of contact.

A. 394 mm/s
B. 525 mm/s
C. 134 mm/s
D. 348 mm/s
Answer» C. 134 mm/s
Discussion
18.

Velocity of sliding at the pitch point = (ωp + ωg) x _____________$

A. path of contact
B. 0
C. arc of approach
D. path of recess
Answer» C. arc of approach
Discussion
19.

Velocity of sliding at the beginning of engagement of the two gears = (ωp + ωg) x ______________

A. path of contact
B. arc of contact
C. arc of approach
D. path of approach
Answer» E.
Discussion