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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

Mechanical Engineering MCQs prepared for job test and interview preparation, especially for fresh graduates, students, and candidates appearing in competitive exams. These multiple-choice questions cover key topics such as Machine Design, Theory of Machines, Hydraulic Machines, and other important mechanical engineering concepts.

Ignition timing of a multicylider petrol engine can be adjusted by_________________?

A rotating the crank

B adjusting the spark plug gap

C adjusting ignition coil position

D rotating the distributor

Review Detailed Answer

Correct Answer: rotating the distributor

The cooling water requirement for diesel engine is of the order of________________?

A 0.2 to 1.0 liter per minute per h.p.

B 1 to 3 liters per minute per h.p.

C 5 to 10 liters per minute per h.p

D 10 to 20 liters per minute per h.p.

Review Detailed Answer

Correct Answer: 1 to 3 liters per minute per h.p.

Leakage past the piston rings and valve seats in I.C. engines with increase in speed_______________?

A increases.

B decreases

C remains same

D unpredictable

Review Detailed Answer

Correct Answer: decreases

The function of a distributor in an automobile is to__________________?

A distribute charge, equally to all the cylinders

B regulate power

C feed lub oil to all moving parts

D time the spark

Review Detailed Answer

Correct Answer: time the spark

For same power and same speed, the flywheel of a four stroke engine as compared to two-stroke I.C. engine will be________________?

A smaller

B bigger

C same size

D dependent on other engine parameters

Review Detailed Answer

Correct Answer: bigger

Solid injection in I.C. engines refers to injection of________________?

A liquid fuel only

B liquid fuel and air

C solid fuel

D solid fuel and air

Review Detailed Answer

Correct Answer: liquid fuel only

The m.e.p. of a petrol engine first increases as the fuel air ratio is increased and then decreases on further increase in fuel air ratio. The M.E.P is maximum in the zone of________________?

A lean mixture

B chemically correct mixture

C rich mixture

D unpredictable

Review Detailed Answer

Correct Answer: rich mixture

The thermal efficiency of a two cycle engine as compared to four cycle engine is_________________?

A more

B less

C same

D more upto some load and then less

Review Detailed Answer

Correct Answer: less

Exhaust pipes of engines are covered with insulating marterial in order to_________________?

A keep the exhaust pipes warm

B reduce formation of condenstae

C reduce heat transfer to the engine room

D increase engine efficiency

Review Detailed Answer

Correct Answer: reduce heat transfer to the engine room

Auto-ignition reaction time for petrol engine first decreases with increase in fuel air ratio, reaches a minimum value and then increases with subsequent increase in fuel air ratio. The minimum value occurs in the region of________________?

A Lean mixture

B Chemically correct fuel air ratio

C Rich mixture

D Unpredictable

Review Detailed Answer

Correct Answer: Chemically correct fuel air ratio

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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

All Topics 1919

All Topics 1919

Ignition timing of a multicylider petrol engine can be adjusted by_________________?

The cooling water requirement for diesel engine is of the order of________________?

Leakage past the piston rings and valve seats in I.C. engines with increase in speed_______________?

The function of a distributor in an automobile is to__________________?

For same power and same speed, the flywheel of a four stroke engine as compared to two-stroke I.C. engine will be________________?

Solid injection in I.C. engines refers to injection of________________?

The m.e.p. of a petrol engine first increases as the fuel air ratio is increased and then decreases on further increase in fuel air ratio. The M.E.P is maximum in the zone of________________?

The thermal efficiency of a two cycle engine as compared to four cycle engine is_________________?

Exhaust pipes of engines are covered with insulating marterial in order to_________________?

Auto-ignition reaction time for petrol engine first decreases with increase in fuel air ratio, reaches a minimum value and then increases with subsequent increase in fuel air ratio. The minimum value occurs in the region of________________?