Practice Test: Question Set - 28
1. Deep groove ball bearings are used for
- (A) Heavy thrust load only
- (B) Small angular displacement of shafts
- (C) Radial load at high speed
- (D) Combined thrust and radial loads at high speed
2. Which of the following screw thread is adopted for power transmission in either direction?
- (A) Acme threads
- (B) Square threads
- (C) Buttress threads
- (D) Multiple threads
3. The contact ratio for gears is
- (A) Zero
- (B) Less than one
- (C) Greater than one
- (D) None of these
4. The gears are termed as medium velocity gears, if their peripheral velocity is
- (A) 1-3 m/s
- (B) 3-15 m/s
- (C) 15-30 m/s
- (D) 30-50 m/s
5. The design calculations for members subject to fluctuating loads with the same factor of safety, yield the most conservative estimates when using
- (A) Gerber relation
- (B) Soderberg relation
- (C) Goodman relation
- (D) None of these
6. In a multiple V-belt drive, if one of the belts break, then
- (A) Only the broken belt is replaced
- (B) The entire set of belts is replaced
- (C) The broken belt and the belt on either side of it, is replaced
- (D) The broken belt need not to be replaced
7. A steel containing up to 0.15% carbon is known as
- (A) Mild steel
- (B) Dead mild steel
- (C) Medium carbon steel
- (D) High carbon steel
8. When a helical compression spring is cut into halves, the stiffness of the resulting spring will be
- (A) Same
- (B) Double
- (C) One-half
- (D) One-fourth
9. A coupling used to connect two perfectly aligned shafts, is
- (A) Muff coupling
- (B) Compression coupling
- (C) Flange coupling
- (D) All of these
10. Soderberg relation is based on __________ of the material whereas all other failure relation for dynamic loading are based on ultimate strength of the material.
- (A) Elastic strength
- (B) Yield strength
- (C) Shear strength
- (D) None of these
11. A connecting rod is designed as a
- (A) Long column
- (B) Short column
- (C) Strut
- (D) All of these
12. When bevel gears having equal teeth and equal pitch angles connect two shafts whose axes intersect at right angle, then they are known as
- (A) Angular bevel gears
- (B) Crown bevel gears
- (C) Internal bevel gears
- (D) Miter gears
13. When the connected members are very yielding (soft gasket) as compared to the bolt, then the resultant load on the bolt will be equal to the
- (A) Initial tension
- (B) External load applied
- (C) Sum of the initial tension and external load applied
- (D) Initial tension or external load, whichever is greater
14. The property of a bearing material which has the ability to accommodate shaft deflections and bearing inaccuracies by plastic deformation without excessive wear and heating, is known as
- (A) Bondability
- (B) Embeddability
- (C) Comformability
- (D) Fatigue strength
15. The shock resistance of steel is increased by adding
- (A) Nickel
- (B) Chromium
- (C) Nickel and chromium
- (D) Cobalt and molybdenum