List of top Mechanical Engineering Questions

Consider the h-s diagram for the Rankine Cycle as shown in Figure. According to the h-s diagram, which of the following steady flow devices is responsible for process 3-4? 
Rankine Cycle
If \( V \) is the velocity of fluid flow, \( V_1 \) and \( V_2 \) are velocity at inlet and outlet of the pipe, respectively, and \( k \) is the value of the coefficient depending on the fittings, then which of the following options has the correct match of case and loss of head?
A riveting machine is driven by a constant torque 3 kW motor. The moving parts including the flywheel are equivalent to 150 kg at 0.6 m radius. One riveting operation takes 1 second and absorbs 10000 N-m of energy. The speed of the flywheel is 300 r.p.m. before riveting. Find the speed immediately after riveting. How many rivets can be closed per minute?
A 6×19 wire rope with fiber core and tensile designation of 1570 is used to raise the load of 20 kN as shown in the below figure. The nominal diameter of the wire rope is 12 mm, and the sheave has 500 mm pitch diameter. Determine the expected life of the rope in years assuming 500 bends per week. 
wire rope with fiber core and tensile designation
A fluid jet discharges from 100 mm diameter nozzle and vena contracta formed has a diameter of 90 mm. If the coefficient of velocity is 0.95, then the coefficient of discharge of the nozzle is:
Which of the following provides a quick-fix means of conducting an initial investigation before attempting a major investigation of surface quality?
A heat pump operates on Carnot cycle pumps heat from a reservoir at 27°C to 327°C. The Coefficient of performance is
If SH, LH represents Sensible Heat and Latent Heat respectively, then identify the CORRECT relation for Sensible Heat Factor (SHF) from the given options.
The condition for a screw jack to be self-locking is that:
According to ——––––––––– equation “for most metals, yield strength depends on average grain diameter.”
Which of the statements is not true for Bainite, which is a micro constituent in Iron–Carbon Alloys?
Which of the following options does not belong to a special purpose lathe?
Having a eutectoid composition ——––––––––– is a microstructural product of an iron–carbon alloy consisting of alternating layers of ferrite and cementite.
What structure is formed in the heat affected zone of a medium carbon steel weld due to rapid cooling?
The term “bulk” in bulk deformation processes describes the work parts that have ——––––––––– ratio.
The characteristics of Planck's black body radiation distribution is given in the options. Which of the following is NOT a characteristic of Planck's black body radiation distribution?
The maximum pull in the tie rods of a turnbuckle used in the roof truss is 4.5kN. The tie rods are made of steel 40C8 ( 380 / ) 2 Syt = N mm and the factor of safety is 5. Determine the nominal diameter of the threads on the tie rod on the basis of maximum principal stress theory. Assume dc = 0.8d.

Match List I with List II:

LIST I 
Mechanical Drive		LIST II 
Function
A. CamsI. Lock a mechanism when it is holding a load.
B. GearsII. Movement of one part relative to another with minimum friction and maximum accuracy.
C. RatchetsIII. Imparts a reciprocating or oscillatory motion to another body in contact.
D. BearingsIV. Transmission of rotary motion between parallel and inclined shafts.

Choose the correct answer from the options given below:

Match List I with List II:

LIST I (Robot Configuration)LIST II (Joints)
A. CylindricalI. RRR
B. CartesianII. RPP
C. SphericalIII. PPP
D. ArticulatedIV. RRP

Choose the correct answer from the options given below:

One single robot for continuous arc welding is unable to resolve the following issue
What is the function of Joints in a Robot Manipulator
The human eye perception is limited to approximately
What is the order of basic transformation of frame {i-1} to frame {i}:
(A). Translation along \(z_{i-1}\) axis by distance \(d_i\)
(B). Rotation by an angle \(\alpha_i\) about \(x_i\)-axis 
(C). Translation along \(x_i\)-axis by distance \(a_i\) 
(D). Rotation by an angle \(\theta_i\) about \(z_{i-1}\)-axis
Choose the correct answer from the options given below:
The link parameters are
Given below are the two statements:
Statement (I): The scale factor in homogeneous transformation matrix can be any real value.
Statement (II): For robotics study, the scale factor in homogeneous transformation matrix is one.
Choose the most appropriate answer from the options given below: