#### Electrical engineering

• ( 1 ) In IC engine mechanism, which formula is used to calculate acceleration of the piston?

• 1) ω2 r (cos θ + cos θ / n)
• 2) ω2 r (cos θ + cos 2θ / n)
• 3) ω2 r (cos θ - cos θ / n)
• 4) ω2 r (cos θ - cos 2θ / n
• Discussion in forum
Answer : 2) ω2 r (cos θ + cos 2θ / n)
Solution :

discussion

Answer : 2) ω2 r (cos θ + cos 2θ / n)

• ( 2 ) Calculate the angle of driving shaft, if the two shafts of the Hooke's joint are inclined at an angle of 18.50°

• 1) 45.56°
• 2) 37.70°
• 3) 39.17°
• 4) 41.95°
• Discussion in forum
Solution :

discussion

• ( 3 ) Identify the type of absorption dynamometer ?

• 1) Epicyclic dynamometer
• 2) Prony brake dynamometer
• 3) Torsion dynamometer
• 4) Tatham dynamometer
• Discussion in forum
Answer : 2) Prony brake dynamometer
Solution :

discussion

Answer : 2) Prony brake dynamometer

• ( 5 ) Frequency of vibrations is usually expressed in

• 1) number of cycles per minute
• 2) number of cycles per hour
• 3) number of cycles per second
• 4) None of these
• Discussion in forum
Answer : 3) number of cycles per second
Solution :

discussion

Answer : 3) number of cycles per second

• ( 6 ) The relation between number of pairs (p) forming a kinematic chain and the number of links (l) is

• 1) l = 2p - 3
• 2) l = 2p - 5
• 3) l = 2p - 4
• 4) l = 2p - 2
• Discussion in forum
Answer : 3) l = 2p - 4
Solution :

discussion

Answer : 3) l = 2p - 4

• ( 7 ) The minimum force required to slide a body of weight W on a rough horizontal plane is

• 1) W cos θ
• 2) W tan θ
• 3) W sin θ
• 4) W cosec θ
• Discussion in forum
Answer : 3) W sin θ
Solution :

discussion

Answer : 3) W sin θ

• ( 8 ) If the damping factor for a vibrating system is unity, then the system will be

• 1) under damped
• 2) critically damped
• 3) over damped
• 4) without vibrations
• Discussion in forum
Solution :

discussion

• ( 9 ) In Meyer's expansion valve, the expansion valve is driven by an eccentric having an angle of advance from

• 1) 80° - 90°
• 2) 50° - 60°
• 3) 60° - 70°
• 4) 70° - 80°
• Discussion in forum
Answer : 1) 80° - 90°
Solution :

discussion

Answer : 1) 80° - 90°

• ( 10 ) The cam and follower is an example of

• 1) sliding pair
• 2) rolling pair
• 3) higher pair
• 4) lower pair
• Discussion in forum