Learn Everything at One Place !

In a 4-stroke IC engine, the turning moment during the compression stroke is

Q.  
In a 4-stroke IC engine, the turning moment during the compression stroke is


Answer & Explanation

During compression stroke, the power is used to compress the charge and valves are closed/opened before or after dead centers. Hence, turning moment is negative during major portion of the stroke.

Thus correct option is: D.

Similar Questions

Start Discussion :




Comments :
More Questions Theory of Machines:

Q.  
In case of a flywheel, the maximum fluctuation of energy is the

A. Sum of maximum and minimum energies

B. Difference between the maximum and minimum energies

C. Ratio of the maximum and minimum energies

D. Ratio of the minimum and maximum energies


Answer & Explanation

Q.  
If the size of a flywheel in a punching machine is increased

A. Then the fluctuation of speed and fluctuation of energy will both decrease

B. Then the fluctuation of speed will decrease and the fluctuation of energy will increase

C. Then the fluctuation of speed will increase and the fluctuation of energy will decrease

D. Then the fluctuation of speed and fluctuation of energy both will increase


Answer & Explanation

Q.  
Oldham’s coupling is an inversion of

A. Four-bar mechanism

B. Crank and lever mechanism

C. Single slider crank mechanism

D. Double slider crank mechanism


Answer & Explanation

Q.  
The ratio of tension on the tight side to that on the slack side in a flat belt drive is

A. Proportional to the product of coefficient of friction and lap angle

B. An exponential function of the product of coefficient of friction and lap angle

C. Proportional to the lap angle

D. Proportional to the coefficient of friction


Answer & Explanation
(Click here) Practice More Questions/MCQ on Theory of Machines