Theory Of Machine MCQ Questions & Answers

51

The behaviour of gases can be fully determined by

A) 1 law B) 2 laws C) 3 laws D) 4 laws

Discuss

Answer & Solution

Answer: Option D

Solution:

The behavior of gases can be comprehensively determined by 4 fundamental laws:

Boyle's Law – Relates pressure and volume at constant temperature.

Charles's Law – Relates volume and temperature at constant pressure.

Gay-Lussac's Law – Relates pressure and temperature at constant volume.

Avogadro's Law – States that the volume of a gas is directly proportional to the number of moles of the gas at constant temperature and pressure.

Together, these four laws provide a complete description of gas behavior under various conditions.

52

An engine operates between temperatures of 900K and T₁ and another engine between T₂ and 400K. For both to do equal work, value of T₂ will be

A) 650K B) 600K C) 625K D) 700K

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

53

A watt's governor can work satisfactorily at speeds from

A) 60 to 80 r.p.m. B) 80 to 100 r.p.m. C) 100 to 200 r.p.m. D) 200 to 300 r.p.m.

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

54

The mechanism forms a structure, when the number of degrees of freedom (n) is equal to

A) 0 B) 1 C) 2 D) -1

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

55

The centre of gravity of a coupler link in a four bar mechanism will experience

A) No acceleration B) Only linear acceleration C) Only angular acceleration D) Both linear and angular acceleration

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

56

Instantaneous center of rotation of a link in a four bar mechanism lies on

A) Right side pivot of this link B) Left side pivot of this link C) A point obtained by intersection on extending adjoining links D) Can’t occur

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

57

The values of velocity and acceleration of piston at near dead center for a slider-crank mechanism will be

A) 0, and more than co2r B) 0, and less than coV C) 0, 0 D) cor, 0

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

58

When the two elements of a pair have a surface contact when relative motion takes place and the surface of one element slides over the surface of the other, the pair formed is known as a

A) Lower pair B) Higher pair C) Self-closed pair D) Force-closed pair

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

59

The ratio of the number of teeth to the pitch circle diameter in millimeters, is called

A) Circular pitch B) Diametral pitch C) Module D) None of these

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

60

Which of the following mechanism is an approximate straight line motion mechanism?

A) Watt's mechanism B) Grasshopper mechanism C) Robert's mechanism D) All of these

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

Theory Of Machine MCQ Questions & Answers | Mechanical Engineering