Description : When a helical spring is cut into two halves, the stiffness of each half spring will be, (A) Same as original spring (B) Double of original spring (C) Half of original spring (D) One fourth of original spring
Last Answer : (B) Double of original spring
Description : The force required to produce unit deflection is known as (A) gradient of spring (B) stiffness of the spring (C) spring constant (D) all of the above
Last Answer : (D) all of the above
Description : A close –coiled helical spring is cut into two equal parts. The stiffness of the resulting springs will be (a) same (b) double (c) half (d) One-fourth
Last Answer : (b) double
Description : The stiffness of solid shaft is more than the stiffness of hollow shaft with same weight. a) True b) False
Last Answer : b) False
Description : The stiffness of spring is, (A) Deflection per unit of axial force (B) Force per unit cross-sectional area of spring (C) Ratio of mean coil diameter to wire diameter (D) Force required to produce unit deflection
Last Answer : (D) Force required to produce unit deflection
Description : Which of the following property is essential for spring materials? (A) Stiffness (B) Ductility (C) Resilience (D) Plasticity
Last Answer : (C) Resilience
Description : For two springs connected in parallel, net force is equal to the sum of force in each spring. a) True b) False
Last Answer : a) True
Description : For two spring connected in series, the force acting on each spring is same and equal to half of the external force. a) True b) False
Description : For two springs in parallel, effective stiffness (k) is Where k 1 & k 2 are stiffness of springs 1 & 2 respectively (A) k 1 k 2 / (k 1 + k 2 ) (B) k 1 + k 2 (C) k 1 k 2 (D) (k 1 + k 2 ) / k 1 k 2
Last Answer : (B) k 1 + k 2
Description : For two springs in series, effective stiffness (k) is Where k 1 & k 2 are stiffness of springs 1 & 2 respectively (A) k 1 k 2 / (k 1 + k 2 ) (B) k 1 + k 2 (C) k 1 k 2 (D) (k 1 + k 2 ) / k 1 k 2
Last Answer : (A) k 1 k 2 / (k 1 + k 2 )
Description : The resultant axial force on bolt depends upon (A) Initial tension (B) External applied load (C) Stiffness of bolt and parts held by bolt (D) All three factors
Last Answer : (D) All three factors
Description : Belleville spring can be used in clutch application. a) True b) False
Description : The strip of spiral spring is never subjected to pure bending moment. a) True b) False
Description : Surge is caused by resonance effect in the spring. a) True b) False
Description : Spring having square ends has 1 inactive coil. a) True b) False
Description : A spring with index=15 is prone to buckling. a) True b) False
Description : The spring index is the ratio of wire diameter to mean coil diameter. a) True b) False
Description : The helical spring ad wire of helical torsion spring, both are subjected to torsional shear stresses. a) True b) False
Description : Which of the following relations is true when springs are connected parallelly? where K = spring stiffness a.Ke= K1 +K2 b. (1/Ke)=(1/K1)+(1/K2) c.Ke= (1/K1)+(1/K2) d.None of the above
Last Answer : a.Ke= K1 +K2
Description : A helical spring of constant k is cut into four equal pieces and the four pieces are then combined in parallel. The equivalent spring constant will be (a) k/16 (b) k/4 (c) 4k (d) 16k
Last Answer : (d) 16k
Description : Cold riveting holds the connected parts better than hot riveting. a) True b) False
Description : Stressed parts are always kept in tension. a) True b) False
Description : A spring with 25 active coils cannot be accommodated within a given space. Hence 5 coils of the spring are cut. The stiffness of the new spring will be a. the same b. 1.25 times the original spring c. 0.8 times the original spring d. 20 times the original spring
Last Answer : b. 1.25 times the original spring
Description : Two springs of stiffness k1 and k2 are connected in series, the combined (A) k1k2/k1 + k2 (B) k1k2/k1 - k2 (C) k1 + k2 (D) k1 + k2/k1k2
Last Answer : (A) k1k2/k1 + k2
Description : Two springs of stiffness k1 and k2 are connected in parallel, the combined stiffness of the connection is given by, (A) k1k2/k1 + k2 (B) k1k2/k1 - k2 (C) k1 + k2 (D) k1 + k2/k1k2
Last Answer : (C) k1 + k2
Description : Which of the following is measure of stiffness? a) Modulus of elasticity b) Modulus of plasticity c) Resilience d) Toughness
Last Answer : a) Modulus of elasticity
Description : If the spring mass system with m and spring stiffness k is taken to very high altitude, the natural frequency of longitudinal vibrations * 1 point (A) increases (B) decreases (C) remain unchanged (D) may increase or decrease depending upon the value of the mass
Last Answer : (C) remain unchanged
Description : In a spring mass system of mass m and stiffness k, the end of the spring are securely fixed and mass is attached to intermediate point of spring. The natural frequency of longitudinal ... is attached decreases D) Decreases as the distance from the bottom end where mass is attached decreases
Last Answer : B) Is minimum when mass is attached to mid point of the spring
Description : If the spring mass system with m and spring stiffness k is taken to very high altitude , the natural frequency of longitudinal vibrations A) Increases B) Decreases C) Remain unchanged D) May be increase or decrease depending upon the value of the mass
Last Answer : C) Remain unchanged
Description : Equivalent stiffness of spring connected in paralled having stiffness k1 and k2 can be given as A) K = k1+ k2 B) K = k1- k2 C) 1/k = 1/k1 + 1/k2 D) 1/k = 1/k1 - 1/k2
Last Answer : A) K = k1+ k2
Description : Jam nut is a locking device in which (A) A smaller nut is tightened against main nut creating friction at the contacting surface (B) A split pin is passed through diametrically opposite slots in nut and ... parts of nut separated by slot (D) An elastic piece is tightened in the nut by a setscrew
Last Answer : (A) A smaller nut is tightened against main nut creating friction at the contacting surface
Description : Castle nut is a locking device in which (A) A smaller nut is tightened against main nut creating friction at the contacting surface (B) A split pin is passed through diametrically opposite slots in nut and ... of nut separated by slot (D) An elastic piece is tightened in the nut by a setscrew
Last Answer : (B) A split pin is passed through diametrically opposite slots in nut and a hole in bolt and the two ends of split pin are separated and bent back on nut
Description : For two springs connected in series, the net deflection is equal to the sum of deflection in two springs. a) True b) False
Description : A spring with a force constant k is cut into thirds. The force constant of each of the new springs is w) k x) 3k y) (1/3)k (read: one third k) z) 9k
Last Answer : ANSWER: X -- 3k
Description : A vehicle suspension system consists of a spring and a damper. Stiffness of spring is 3.5 KN/m and damping constant of damper is 400Ns/m. If mass is 50 kg, then damping factor is A 0.606 B 0.10 C 0.666 D 0.471
Last Answer : D 0.471
Description : A vehicle suspension system consists of a spring and a damper. The stiffness of the spring is 3.6 kN/m and the damping constant of the damper is 400 Ns/m. If the mass is 50 kg, then the damping factor (d ) and damped natural ... , are a) 0.471 and 1.19 Hz b) 0.471 and 7.48 Hz c) 0.666 and 1.35 Hz
Last Answer : a) 0.471 and 1.19 Hz
Description : A vehicle suspension system consists of a spring and a damper. The stiffness of the spring is 3.6 kN/m and the damping constant of the damper is 400 Ns/m. If the mass is 50 kg, then the damping factor (d ) and damped natural ... .19 Hz b) 0.471 and 7.48 Hz c) 0.666 and 1.35 Hz d) 0.666 and 8.50 Hz
Description : Pick out the wrong statement. (A) The equivalent stiffness of two springs (of equal stiffness 'S') in series is S/2 while in parallel is 2S (B) For a helical spring, deflection is ... is less than the buckling load (D) Modulus of resilience is proportional to (stress at elastic limit)2
Last Answer : (C) Crushing load or columns is less than the buckling load
Description : Two close-coiled helical springs are equal in all respects except the number of turns. If the number of turns are in the ratio of 2:3, then the stiffness of the spring will be in the ratio of (a) 2:3 (b) 4:9 (c) 3:2 (d) 9:4
Last Answer : (c) 3:2
Description : A spring of stiffness 100 N/mm used in a spring-loaded safety valve of diameter 20 mm on a boiler with the pressure inside the boiler equal to 1 MPa should be initially compressed by a. 5mm b. 3.14 mm c. 2mm d. 6.28 mm
Last Answer : b. 3.14 mm
Description : Feather key can be used to prevent axial motion between two elements. a) True b) False
Description : Cotter joint is going to be use to connect the two rods for torque transmission purpose. a) True b) False
Description : Cotter joint can be used to connect two rods for torque transmission purpose. true /false. a) True b) False
Description : The real application of knuckle joint is used to connect three rods - two with forks and a third with the eye. A. True B. False
Last Answer : A. True
Description : The knuckle joint is used two joint between the tie bars in roof trusses. A. True B. False
Description : Knuckle Joint is used to connect the two rods whose axes are coincide or intersect and lies in the same plane. A. True B. False
Description : A knuckle joint is unsuitable for two rotating shafts, which transmit torque a) True b) False
Description : Cotter joint can be used to connect two rods for torque transmission purpose. a) True b) False
Description : A fillet weld is an approximately triangular cross section joining two surfaces lying parallels to each other. a) True b) False