Mechanical System Design Test Questions | Set 2

MCQs 1: Which of the following statements is/are false if separate cylinder liner is pressed inside the cylinder of large engines?

Easy replacement of liner in case of wear and tear

Cheap grade material cannot be used for jacket

Liner is to be made of heat resistant cast iron

None of the above

Answer Explanation

MCQs 2: Which type of cylinder liners are used in engines having bore diameter more than 125 mm?

Dry liners

Wet liners

Both a. and b.

None of the above

Answer Explanation

MCQs 3: Which of the following materials are used for cylinder liners?

Alloy cast iron

Grey cast iron

Both a. and b.

None of the above

Answer Explanation

MCQs 4: Thermal stress in cylinder liners can be reduced by _______

increasing the wall thickness of cylinder liner

increasing velocity of flowing water through jacket

both a. and b.

none of the above

Answer Explanation

MCQs 5: Which stress is induced in cylinder wall due to side thrust of the piston?

Axial stress

Circumferential stress

Longitudinal stress

Bending stress

Answer Explanation

MCQs 6: Assignable causes are caused due to changes in _________

manufacturing process

material

inspection process

all of the above

Answer Explanation

MCQs 7: What is the relation between standard deviation(σ) and arithmetic mean (μ) to determine coefficient of variation (C)?

C = σ + μ

C = σ – μ

C = σ / μ

C = σ x μ

Answer Explanation

MCQs 8: Which of the following curves have the mean value equal to zero in the graph of frequency vs random variable?

Normal distribution curve

Standard normal distribution curve

Both a. and b.

None of the above

Answer Explanation

MCQs 9: What is the maximum percentage loss of economic cutting speed if geometric progression ratio = 1.06 ?

17.0 %

11.5 %

5.7 %

2.9 %

Answer Explanation

MCQs 10: What is the geometric progression ratio if maximum and minimum spindle speeds are 500 r.p.m and 300 r.p.m respectively? (Number of speed steps = 7)

0.91

1.5

1.08

2.0

Answer Explanation

MCQs 1: Which of the following statements is/are false if separate cylinder liner is pressed inside the cylinder of large engines?

MCQs 2: Which type of cylinder liners are used in engines having bore diameter more than 125 mm?

MCQs 3: Which of the following materials are used for cylinder liners?

MCQs 4: Thermal stress in cylinder liners can be reduced by _______

MCQs 5: Which stress is induced in cylinder wall due to side thrust of the piston?

MCQs 6: Assignable causes are caused due to changes in _________

MCQs 7: What is the relation between standard deviation(σ) and arithmetic mean (μ) to determine coefficient of variation (C)?

MCQs 8: Which of the following curves have the mean value equal to zero in the graph of frequency vs random variable?

MCQs 9: What is the maximum percentage loss of economic cutting speed if geometric progression ratio = 1.06 ?

MCQs 10: What is the geometric progression ratio if maximum and minimum spindle speeds are 500 r.p.m and 300 r.p.m respectively? (Number of speed steps = 7)

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