Mechanical Engineering Multiple Choice Questions and Answers

31. Main disadvantage of nuclear energy is

1. High operating cost
2. Low efficiency
3. Waste disposal
4. All of above

32. Natural fuel is

1. That occur in nature
2. Known as secondary fuel
3. Prepared fuel
4. None of the above

33. Petroleum is

1. Solid fuel
2. Liquid fuel
3. Secondary fuel
4. None of this

34. Pump is a machine which is used to do

1. lift liquid from low height to higher elevation
2. To store liquid
3. To compress liquid
4. none of the above

35. Reducing pressure angle on gears results in

1. Weaker teeth
2. Stronger teeth
3. High velocity ratio
4. High efficiency

36. Saturation temperature of steam increase

1. With decrease in pressure
2. with increase in pressure
3. is unaffected by pressure
4. none of the above

37. Specific heat is defined as the amount of heat required

1. To raise unit of temp of a substance
2. To raise unit mass of substance through unit degree of temperature
3. To raise unit mass of substance through 100 C
4. None of this

38. The ability of a material to resist fracture due to high impact loads is called

1. strength
2. stiffness
3. toughness
4. brittleness

39. The air standard cycle on which the petrol engine work is

1. Otto cycle
2. Carrot cycle
3. Joule cycle
4. Dual cycle

40. The cam shaft speed of four stroke engine is

1. Double than crank shaft speed
2. Four times of crank shaft speed
3. Equal to crank shaft speed
4. Half of crank shaft speed