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.

Flexible shafts have ______ rigidity in bending moment.

A. High
B. Low
C. Very high
D. Extremely low
Answer» C. Very high
2.

The strength of hollow shaft is more than the strength of solid shaft of same weight.

A. True
B. False
Answer» B. False
3.

The stiffness of solid shaft is more than the stiffness of hollow shaft with same weight.

A. True
B. False
Answer» C.
4.

If yielding strength=400N/mm², the find the permissible shear stress according to ASME standards.

A. 72 N/mm²
B. 76 N/mm²
C. 268 N/mm²
D. 422 N/mm²
Answer» B. 76 N/mm²
5.

Calculate the shaft diameter on rigidity basis if torsional moment is 196000N-mm, length of shaft is 1000mm. Permissible angle of twist per meter is 0.5’ and take G=79300N/mm².

A. None of the listed
B. 41.2mm
C. 35.8mm
D. 38.8mm
Answer» C. 35.8mm
6.

If allowable shear stress in the shaft is 70N/mm² and torsional and bending moments are M=1185000N-mm and m=330000N-mm, find the diameter of the shaft.

A. 36.8mm
B. 39.7mm
C. 44.7mm
D. 40.3mm
Answer» D. 40.3mm
7.

CALCULATE_THE_SHAFT_DIAMETER_ON_RIGIDITY_BASIS_IF_TORSIONAL_MOMENT_IS_196000N-MM,_LENGTH_OF_SHAFT_IS_1000MM._PERMISSIBLE_ANGLE_OF_TWIST_PER_METER_IS_0.5‚ÄÖ√Ñ√∂‚ÀÖ√Ë‚ÀÖ¬•_AND_TAKE_G=79300N/MM¬¨¬®‚ÄÖ√¢¬ß.?$#

A. None of the listed
B. 41.2mm
C. 35.8mm
D. 38.8mm
Answer» B. 41.2mm
8.

The stiffness of solid shaft is more than the stiffness of hollow shaft with same weight.$

A. True
B. False
Answer» B. False
9.

If_yielding_strength=400N/mm²,_the_find_the_permissible_shear_stress_according_to_ASME_standards.$#

A. 72 N/mm²
B. 76 N/mm²
C. 268 N/mm²
D. 422 N/mm²
Answer» C. 268 N/mm¬¨¬®‚Äö√¢¬ß
10.

Flexible shafts have ___ rigidity in torsion making them flexible.

A. Low
B. High
C. Very high
D. Infinitely small
Answer» C. Very high
11.

Solid shafts are used in epicyclic gearboxes.

A. True
B. False
Answer» C.
12.

Solid shaft is costlier than hollow shaft of same weight.

A. True
B. False
Answer» C.
13.

The_strength_of_hollow_shaft_is_more_than_the_strength_of_solid_shaft_of_same_weight.

A. True
B. False
Answer» C.
14.

If bending moment on point B in horizontal plate is M and in vertical plane is m, then the net bending moment at point B is?

A. M
B. m
C. M+m
D. √M²+m²
Answer» C. M+m
15.

If allowable shear stress in the shaft is 70N/mm² and torsional and bending moments are M=1185000N-mm and m=330000N-mm, find the diameter of the shaft.$

A. 36.8mm
B. 39.7mm
C. 44.7mm
D. 40.3mm
Answer» E.
16.

Calculate the tension in the rope of pulley C.

A. 6778.3N and 7765.3N
B. 5948.15N and 2288.75N
C. 5468.4N ad 8678.3N
D. None of the listed
Answer» D. None of the listed
17.

Calculate the torque supplied to the shaft.

A. 453.5N-m
B. 549.3N-m
C. 657.3N-m
D. None of the listed
Answer» C. 657.3N-m
18.

Does ASME Standard take into consideration shock and fatigue factors?

A. Yes
B. No
Answer» B. No
19.

According to ASME code, maximum allowable shear stress is taken as X% of yield strength or Y% of ultimate strength.

A. X=30 Y=18
B. X=30 Y=30
C. X=18 Y=18
D. X=18 Y=30
Answer» B. X=30 Y=30
20.

While designing shaft on the basis of torsional rigidity, angle of twist is given by?

A. Ml/Gd‚Å¥
B. 584Ml/Gd‚Å¥
C. 292 Ml/Gd‚Å¥
D. None of the mentioned
Answer» C. 292 Ml/Gd‚Äö√Ñ√∂‚àö√ñ¬¨‚Ä¢