1⟩ The sleeve or muff coupling is designed as a A. dun cylinder B. thick cylinder C. solid shaft D. hollow shaft
D. hollow shaft
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69 Design Engineer Questions And Answers
2⟩ Screws used for power transmission should have A. Low efficiency B. high efficiency C. very fine threads D. strong teeth
Option B
3⟩ When bevel gears connect two shafts whose axes intersect at an angle greater than a right angle and one of the bevel gears has a pitch angle of 90°, then they are known as A. angular bevel gears B. crown bevel gears C. internal bevel gears D. mitre gears
Option B
4⟩ The number of rivets in shear shall be equal to the number of rivets in crushing. A. Correct B. Incorrect
Option A
5⟩ A sliding bearing in which the working surfaces are completely separated from each other by lubricant is called zero film bearing. A. True B. False
Option B
6⟩ Which of the following statement is wrong ? A. The power transmitted by V-belts is less than flat belts for the same coefficient of friction, arc of contact and allowable tension in the belts B. The V-belt drive is used with large centre distance C. The V-belt may be operated in either direction with tight side of the belt at the top or bottom D. The ratio of driving tensions in V-belt drive is more than flat belt drives
Option B
7⟩ Slenderness ratio is the ratio of A. maximum size of column to minimum size of column B. width of column to depth of column C. effective length of column to least radius of gyration of the column D. effective length of column to width of column
Option C
8⟩ In order to avoid tearing of the plate at an edge, the distance from the centre line of the rivet hole to the nearest edge of the plate should be equal to (where d = Diameter of rivet hole) A. d B. 1.5 d C. 2 d D. 2.5 d
Option B
9⟩ According to Guest's theory, the failure occurs at a point in a member when the maximum shear stress in a bi-axial stress system reaches the shear stress at elastic limit in simple tension test. A. True B. False
Option A
10⟩ In a flange coupling, the thickness of flanges is taken as one-half the diameter of shaft. A. Agree B. Disagree
Option A
11⟩ The rolling contact bearings as compared to sliding contact bearings have A. small overall dimensions B. accuracy of shaft alignment C. low starting and low running friction except at very high speeds D. all of the above
Option D
12⟩ The endurance limit for a mirror polished material will be __________ as compared to unpolished material. A. same B. less C. more
Option C
13⟩ The maximum normal stress theory is used for A. brittle materials B. ductile materials C. plastic materials D. non-ferrous materials
Option A
14⟩ The bearings of heavy series have capacity __________ over the medium series. A. 10 to 20% B. 20 to 30% C. 30 to 40% D. 40 to 50%
Option B
15⟩ Two shafts A and B under pure torsion are of identical length and identical weight and are made of the same material. The shaft A is solid and the shaft B is hollow. We can say that A. shaft B is better than shaft A B. shaft A is better than shaft B C. both the shafts are equally good
Option A
16⟩ Which of the following statement is correct for gears? A. The addendum is less than dedendum B. The pitch circle diameter is equal to the product of module and number of teeth C. The pitch circle is always greater than the base circle D. all of the above
Option D
17⟩ The constant factor in case of R10 series of preferred numbers is A. 1.06 B. 1.12 C. 1.26 D. 1.58
Option C
18⟩ In order to obtain the bolts of uniform strength, an axial hole is drilled through the head as far as the threaded portion such that the area of shank becomes equal to the root area of the thread. A. True B. False
Option A
19⟩ The value of stress concentration factor depends upon A. material of the part B. geometry of the part C. material and geometry of the part D. none of these
Option C
20⟩ The ball bearings are provided with a cage A. to reduce friction B. to facilitate slipping of balls C. to prevent the lubricant from flowing out D. to maintain the balls at a fixed distance apart
Option D
