161. A single strap butt joint is always in __________ shear.
single
double
✅ The correct answer is option A.
Machine Design MCQs
162. A plate with a circular hole in the centre is subjected to a pull of P. The maximum stress induced at the edge of the hole is three times of the nominal stress.
Correct
Incorrect
✅ The correct answer is option A.
163. The pitch diameter is the __________ diameter of an external or internal screw thread.
effective
smallest
largest
✅ The correct answer is option A.
164. The efficiency of a riveted joint is equal to
Pt/P
Ps/P
Pc/P
least of Pt, Ps and Pc
✅ The correct answer is option D.
165. Which one of the following is a positive drive?
Crossed flat belt drive
Rope drive
V-belt drive
Chain drive
✅ The correct answer is option D.
166. An aluminium member is designed on the basis of
yield stress
elastic limit stress
proof stress
ultimate stress
✅ The correct answer is option A.
167. The minor diameter of a screw thread is also known as outside or nominal diameter.
Correct
Incorrect
✅ The correct answer is option B.
168. Two helical springs of the same material and of equal circular cross-section, length and number of turns, but having radii 80 mm and 40 mm, kept concentrically (smaller radius spring within the larger radius spring), are compressed between two parallel planes with a load W. The inner spring will carry a load equal to
W/2
2 W/3
W/9
8 W/9
✅ The correct answer is option B.
169. The ratio of driving tensions in V-belt drives is __________ flat belt drives.
equal to
sin α times more than
sin α times less than
cosec α times more tha
✅ The correct answer is option D.
170. In helical gears, the distance parallel to the axis, between similar faces of adjacent teeth, is called
normal pitch
axial pitch
diametral pitch
module
✅ The correct answer is option B.