Time Left - 06:00 mins
SSC-JE ME || Theory of Machines 8
Attempt now to get your rank among 136 students!
Question 1
A rotor is balanced by 2 masses of 50 kg at 20 cm radius and 30 kg at 30 cm radius. If it balances a mass of 40 kg, at what radius does single balancing mass is present ___________?
m1 = 50 kg @ r1 = 20 cm
m2 = 50 kg @ r2 = 30 cm
Question 2
What is the condition for dynamic balancing of a shaft-rotor system?
Question 3
A mass m1 attached to a shaft at radius r1, rotating with angular velocity ω rad/s, can be balanced by another single mass m2 which is attached to the opposite side of the shaft at radius r2, in the same plane, if
Question 4
In a prime mover, two types of forces are acting which causes imbalance and thus vibrations. Thus purpose of balancing the prime mover is to :
a) Eliminate resultant force
b) Eliminate Couple
c) Keep Speed constant
d) Keep Power constant
a) Eliminate resultant force
b) Eliminate Couple
c) Keep Speed constant
d) Keep Power constant
Question 5
In order to balance the reciprocating masses _________.
Question 6
The principle of direct and reverse cranks is readily applicable to __________.
Question 7
Multi-cylinders engine gives______.
Question 8
To balance a reciprocating train engine a balance mass of 80 kg is placed at a radius of 100mm. If the pressure on the rails in the downward direction is 200 N, then the permissible value of angular speed is
Question 9
If primary direct crank of reciprocating engine makes θ with line of stroke, then what angle will the secondary direct crank makes with the line of stroke?
Question 10
The four-stroke six-cylinder in-line engine symmetrical about centre line can be balanced for______.
- 136 attempts
- 0 upvotes
- 0 comments
Oct 18AE & JE Exams
