Explore topic-wise MCQs in Machine Design.

This section includes 20 Mcqs, each offering curated multiple-choice questions to sharpen your Machine Design knowledge and support exam preparation. Choose a topic below to get started.

1.

A pair of spur gears consist of 25 teeth pinion meshing with a 115 teeth gear. The module is 5mm. Calculate the pitch circle diameter of the gear.

A. Cannot be determined
B. 31mm
C. 475mm
D. 575mm
Answer» E.
Discussion
2.

A pair of spur gears consist of 25 teeth pinion meshing with a 115 teeth gear. The module is 5mm. Calculate pitch circle diameter of the pinion.

A. 95mm
B. 105mm
C. 115mm
D. 125mm
Answer» E.
Discussion
3.

A pair of spur gears consist of 25 teeth pinion meshing with a 115 teeth gear. The module is 5mm. Calculate the centre distance.

A. 280mm
B. 269mm
C. 350mm
D. 305mm
Answer» B. 269mm
Discussion
4.

Inaccuracies in tooth profile lead to concentration of pressure on the middle of tooth.

A. True
B. False
Answer» C.
Discussion
5.

20⁰ stub involute system have comparatively smaller interference.

A. True
B. False
Answer» B. False
Discussion
6.

A_PAIR_OF_SPUR_GEARS_CONSIST_OF_25_TEETH_PINION_MESHING_WITH_A_115_TEETH_GEAR._THE_MODULE_IS_5MM._CALCULATE_THE_CENTRE_DISTANCE.?$

A. 280mm
B. 269mm
C. 350mm
D. 305mm
Answer» B. 269mm
Discussion
7.

A pair of spur gears consist of 25 teeth pinion meshing with a 115 teeth gear. The module is 5mm. Calculate the pitch circle diameter of the gear.$

A. Cannot be determined
B. 31mm
C. 475mm
D. 575mm
Answer» E.
Discussion
8.

A_pair_of_spur_gears_consist_of_25_teeth_pinion_meshing_with_a_115_teeth_gear._The_module_is_5mm._Calculate_pitch_circle_diameter_of_the_pinion.$

A. 95mm
B. 105mm
C. 115mm
D. 125mm
Answer» E.
Discussion
9.

A pair of spur gears consist of 25 teeth pinion meshing with a 115 teeth gear. The module is 5mm. Calculate the bottom clearance.

A. None of the listed
B. 1.75mm
C. 2.5mm
D. 1.25mm
Answer» E.
Discussion
10.

A pair of spur gears consist of 25 teeth pinion meshing with a 115 teeth gear. The module is 5mm. Calculate the tooth thickness.

A. 6.23mm
B. 5.44mm
C. 7.854mm
D. 8.16mm
Answer» D. 8.16mm
Discussion
11.

A pair of spur gears consist of 25 teeth pinion meshing with a 115 teeth gear. The module is 5mm. Calculate the dedendum.

A. 4.75mm
B. 5mm
C. 6.25mm
D. 6.68mm
Answer» D. 6.68mm
Discussion
12.

A pair of spur gears consist of 25 teeth pinion meshing with a 115 teeth gear. The module is 5mm. Calculate the addendum.

A. None of the listed
B. 4.75mm
C. 5.25mm
D. 5mm
Answer» E.
Discussion
13.

Inaccuracies in tooth profile lead to concentration of pressure on the middle of tooth?

A. True
B. False
Answer» C.
Discussion
14.

Crowning is an abrasive process that debars the gear strength.

A. True
B. False
Answer» C.
Discussion
15.

As the module increases, index of size of gear decreases.

A. True
B. False
Answer» C.
Discussion
16.

Which of the following have stronger teeth?

A. Stub teeth
B. Full depth teeth
C. Both have equal strength
D. Can’t be determined
Answer» B. Full depth teeth
Discussion
17.

20‚Äö√Ö‚àû stub involute system have comparatively smaller interference.$

A. True
B. False
Answer» B. False
Discussion
18.

Which of the following statements are not true?

A. Increasing pressure angle improves the tooth strength
B. Contact duration is decreased with increase in pressure angle
C. 20‚Äö√Ö‚àû pressure angle has quieter operation then 14.5‚Äö√Ö‚àû
D. All of the statements are true
Answer» D. All of the statements are true
Discussion
19.

When the number of teeth reaches infinity, circle radius approaches infinity the gear becomes an infinite loop.

A. True
B. False
Answer» C.
Discussion
20.

There are ____ standard systems for the shape of gear teeth.

A. 1
B. 2
C. 3
D. 4
Answer» D. 4
Discussion