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

Bennett’ 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

Ritterhaus’ construction is used when the motion of the crank is linear shm.

A

True

B

False

In which of the following cases Ritterhaus’ construction can be used?

A

Crank has a uniform angular velocity

B

Crank has a uniform angular acceleration

C

Lever has a uniform angular acceleration

D

When the motion is SHM

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

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