Bennett’ construction is used to determine graphically the velocity and acceleration of reciprocating parts of an IC engine.

Ritterhaus’ construction is used to determine graphically the velocity and acceleration of reciprocating parts of an IC engine.

A

True

B

False

Find the inertia force of reciprocating parts of an engine, given mass of the reciprocating parts 200 kg and acceleration of reciprocating parts is 120 m/s2.

A

24000 kg-m/s2

B

25000 kg-m/s2

C

23000 kg-m/s2

D

26000 kg-m/s2

The following data relate to a single-cylinder reciprocating engine: mass of reciprocating parts = 40 kg, mass of revolving parts = 30 kg at crank radius, speed = 150 rpm, stroke = 350 mm. If 60% of the reciprocating parts and all the revolving parts are to be balanced, what is the balance mass required at a radius of 320 mm ?

A

15.27 kg

B

21.43 kg

C

24.96 kg

D

29.53 kg

When a stone thrown directly upwards reaches the top, it: A. Velocity and acceleration are zero. B. The velocity is zero and the acceleration is about 10 m/s2. C. Velocity is about 10 m/s and acceleration is zero. D. The velocity is about 10 m/s and the acceleration remains the same.

A

C

B

D

C

B

D

A

Which one of the statement is correct?
1. Petrol engine is a reciprocating engine
2. Petrol engine is high speed engine
3. Petrol engine uses petrol as fuel
4. Petrol engine is internal combustion engine

A

All four are correct

B

Only 1 is correct

C

Only 4 is correct

D

All are wrong

The primary unbalanced force due to inertia of reciprocating parts in a reciprocating engine is given by (where m = Mass of reciprocating parts, $$\omega $$ = Angular speed of crank, r = Radius of crank, $$\theta $$ = Angle of inclination of crank with the line of stroke and n = Ratio of the length of connecting rod to radius of crank)

A

$${\text{m}}{\omega ^2}{\text{r}}\sin \theta $$

B

$${\text{m}}{\omega ^2}{\text{r}}\cos \theta $$

C

$${\text{m}}{\omega ^2}{\text{r}}\frac{{\sin 2\theta }}{{\text{n}}}$$

D

$${\text{m}}{\omega ^2}{\text{r}}\frac{{\cos2\theta }}{{\text{n}}}$$

The secondary unbalanced force due to inertia of reciprocating parts in a reciprocating engine is given by (where m = Mass of reciprocating parts, $$\omega $$ = Angular speed of crank, r = Radius of crank, $$\theta $$ = Angle of inclination of crank with the line of stroke and n = Ratio of the length of connecting rod to radius of crank)

A

$${\text{m}}{\omega ^2}{\text{r}}\sin \theta $$

B

$${\text{m}}{\omega ^2}{\text{r}}\cos \theta $$

C

$${\text{m}}{\omega ^2}{\text{r}}\frac{{\sin 2\theta }}{{\text{n}}}$$

D

$${\text{m}}{\omega ^2}{\text{r}}\frac{{\cos2\theta }}{{\text{n}}}$$

Which of the following construction methods is not used to calculate the velocity and acceleration of reciprocating parts of the internal combustion engine?

A

Klien’s construction

B

Ritterhaus’s construction

C

Bennett’s construction

D

D-Alembert’s constructions

In each of the questionsgiven below, a passage has been givenwhich are either situational based ordescribes a scenario. Below eachpassage, a question has been givenwhich is framed to make you to infersomething out of it. Mark out the correctinference as your answer. Set in the glittering balls of genteel ruralsociety of 18th century England andverdant landscape of the idyllicPemberley, “Pride and Prejudice” is thestory of young Elizabeth Bennett whose
property is entailed to the nearest maleheir.
What can be said about the positionof young Elizabeth Bennett in the ruralsociety of 18th century England?

A

Marginal

B

Immaterial

C

Unrelated

D

Extraneous

Consider the following statements.
1. Negative acceleration means velocity increasing with time.
2. A body is said to have non-uniform acceleration, if either magnitude or direction or both of them change during motion.
3. Zero acceleration means, velocity is uniform.
Which of the statements given above is/are correct?

A

1 and 2

B

2 and 3

C

1 and 3

D

Only 2

Bennett’ construction is used to determine graphically the velocity and acceleration of reciprocating parts of an IC engine.

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