Fresher Jobs

Our fresher job section is exclusively for fresh graduates! Find jobs for freshers in major Indian cities including Bangalore, Chennai, Hyderabad, Pune or Kochi

Resources

Find educational articles, blogs, discussion threads and other resources.

Colleges

Find details about any college in India or search for courses.

Download Model question papers & previous years question papers

Posted Date: 10 Feb 2008 Posted By: Girish Patil Member Level: Platinum

2007 Awadhesh Pratap Singh University M.Sc Microbiology physics Question paper

Course: M.Sc Microbiology

University: Awadhesh Pratap Singh University

1. a) State the conditions under which two shafts connected

together by a double Hooke’s joint shall have the same

angular velocities. (3)

b) Define coriolis component of acceleration. Indicate its

magnitude and direction. (3)

c) What conditions must be satisfied by two mass system to

be dynamically equivalent to the rigid body? (3)

d) Explain the terms Friction circle and Friction axis. (3)

e) What are the relative advantages and disadvantages of (i)

flat belts and (ii) chains for the transmission of power. (3)

2. a) What do you mean by constrained motion? Explain different

types of constrained motions with examples and neat

sketches. (7)

b) Explain inversions of a four bar chain with neat sketches.

(8)

3. In the mechanism shown in Fig. 1, OA is fixed, CD = 200

mm, OA = 60 mm, AC = 50 mm and OB (crank) = 150

mm, ÐOAD = 900. Determine the velocity and acceleration

of ‘D’ for counter clock wise rotation of OB at 80 rpm.

(15)

II Year B.E./B.Tech Degree Examination

THEORY OF MACHINES - I

Mechanical Engineering

Time : Three hours Maximum : 75 Marks

14

A

D

C

B

O

45º

4. a) Hook’s joint connects two shafts intersecting at 1500. The

driving shaft rotates at 120 rpm. The driven shaft operates

against a steady torque of 150 Nm and carries a flywheel of

mass 45 Kg and radius of gyration 15 cm. What is the

maximum torque which must be exerted by driving shaft?

(7)

b) What are different types of steering gear mechanisms ? Show

that Davis steering gear mechanism provides correct

steering. (8)

5. a) The following data relate to a connecting rod of a reciprocating

engine:

Weight = 550 N, Distance between bearing centres = 85

cm, Diameter of small end bearing = 7.5 cm, Diameter of

big end bearing = 10 cm, Time of oscillation when the
connecting rod is suspended from small end = 1.83 sec,

Time of oscillation when the connecting rod is suspended

from big end = 1.68 sec.

Determine (a) the radius of gyration of the rod about an axis

through the centre of gravity perpendicular to the plane of

oscillation; (b) the moment of inertia of the rod about the

same axis and (c) the dynamically equivalent system for the

connecting rod. Constituted of two masses, one of which is

situated at the small end centre. (15)

Fig . 1

15
6. a) A certain machine tool does work intermittently. The machine

is fitted with a flywheel of mass 200 Kg and radius of gyration

of 0.4 m. It runs at a speed of 400 rpm between the

operations. The machine is driven continuously by a motor

and each operation takes 8 seconds. When the machine is

doing its work, the speed drops from 400 to 250 rpm. Find
(i) Minimum power of the motor, where there are 5

operations performed per minute and (ii) Energy expanded

in performing each operation. (15)

7. a) Deduce and expression for the friction moment of a conical

thrust bearing and state what assumptions are made. (7)

b) Calculate the power absorbed in overcoming friction and

number of collars required for the thrust bearing whose collars

have 20cm external radius and 15cm internal raidus.

Coefficient of friction is 0.03. Total axial load is 30 KN.

Intensity of pressure is 0.35 N/mm2, speed of shaft is 420
rpm. (8)

8. a) A governor of the Hartnell type has equal balls of mass 3

Kg, set initially at a radius of 200 mm. The arms of the bell

crank lever are 100 mm vertically and 150 mm horizontally.
Find (i) The initial compressive force on the spring, if the

speed for an initial ball radius of 200 mm is 240 rpm and (ii)

The stiffness of the spring required to permit a sleeve

movement of 4 mm on fluctuation of 7½ percent in the engine

speed. (8)

b) Describe the construction and operation of a rope brake

absorption dynamometer. (7)

Return to question paper search

Fresher Jobs

Resources

Colleges

2007 Awadhesh Pratap Singh University M.Sc Microbiology physics Question paper

Next Question Paper: Mathamatics

Previous Question Paper: data structure and algorithm

Related Question Papers:

Categories