Explore topic-wise MCQs in Mechanical Engineering Questions.

This section includes 235 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Engineering Questions knowledge and support exam preparation. Choose a topic below to get started.

1.

Which of the following statements is true for gear drive?

A. Gear drives can transmit very large power
B. Gear drives have low transmission efficiency
C. Gear drives require more space
D. All of the above
Answer» B. Gear drives have low transmission efficiency
Discussion
2.

Which of the following statements is true for stepless regulation of speed and feed rate? 1. Stepless regulation has noisy operation 2. Stepless regulation is compact 3. Less costly than stepped regulation system 4. Speed can only be adjusted only after stopping the machine

A. Statement 1, 2 and 3
B. Only statement 2
C. Only statement 4
D. All the statements are true
Answer» C. Only statement 4
Discussion
3.

Which of the following statements is/are false for active gyroscopic couple?

A. Reactive gyroscopic couple and active gyroscopic couple are opposite in direction
B. In right hand rule, curled fingers denote direction of precession
C. In active gyroscopic couple spin vector and precession vector are parallel to each other
D. All the statements are false
Answer» D. All the statements are false
Discussion
4.

Which of the following statements is/are true for a simple gear train?

A. If number of idle gears is even, driving and driven wheels rotate in opposite direction
B. If number of idle gears is odd, driving and driven wheels rotate in opposite direction
C. If number of idle gears is even, driving and driven wheels rotate in same direction
D. None of the above
Answer» B. If number of idle gears is odd, driving and driven wheels rotate in opposite direction
Discussion
5.

Which of the following statements is/are true for cam profile?

A. Pitch point on the pitch curve has minimum pressure angle
B. In case of roller follower, trace point represents centre of the roller
C. Pitch circle is drawn through trace point from the center of cam
D. All of the above
Answer» C. Pitch circle is drawn through trace point from the center of cam
Discussion
6.

Which of the following statements is/are true for errors in function generation?

A. At precision points structural error is zero
B. Structural errors exist only if mechanical errors exist in synthesized mechanism
C. Structural errors cannot be reduced by increasing number of precession points
D. All of the above
Answer» B. Structural errors exist only if mechanical errors exist in synthesized mechanism
Discussion
7.

Which of the following would constitute a link__________________?

A. piston, piston rings and gudgeon pin
B. piston, and piston rod
C. piston rod and cross head
D. piston, crank pin and crank shaft
E. piston, piston-rod and cross head
Answer» F.
Discussion
8.

Which pairs are considered as higher pairs?

A. When transmitting motion, two links have line or point contact between them
B. When transmitting motion, two links have surface contact or line contact between them
C. Both A & B
D. None of these
Answer» B. When transmitting motion, two links have surface contact or line contact between them
Discussion
9.

Which parameters can be measured using a dynamometer?

A. Force
B. Torque
C. Power
D. All of the above
Answer» E.
Discussion
10.

Which relation is used to denote condition for equal speeds, when driving and driven shafts are connected by Hook's joint?

A. tan θ = ± √cos α
B. tan θ = ± √cot α
C. tan θ = ± √sin α
D. cot θ = ± √cos α
Answer» B. tan θ = ± √cot α
Discussion
11.

Which theory is used to determine safe design of bearings?

A. Uniform wear theory
B. Uniform pressure theory
C. both a. and b.
D. none of the above
Answer» C. both a. and b.
Discussion
12.

Which type of brakes have wooden blocks placed inside flexible steel band?

A. Block brake
B. Band brake
C. Band and Block brake
D. Pivoted block brake
Answer» D. Pivoted block brake
Discussion
13.

Which type of cam does not require any external force to have contact between cam and follower?

A. Preloaded spring cam
B. Conjugate cam
C. Both a. and b.
D. None of the above
Answer» C. Both a. and b.
Discussion
14.

Which type of gear box is used in automobiles?

A. Sliding mesh gear box
B. Differential gear box
C. Synchromesh gear box
D. All of the above
Answer» E.
Discussion
15.

Which type of gears have point contact between two mating gears?

A. Helical gears
B. Spiral gears
C. Both a. and b.
D. None of the above
Answer» C. Both a. and b.
Discussion
16.

Which type of gear train and gears are used in Humpage Gear Box?

A. Epicyclic gear train with bevel gears
B. Epicyclic gear train with worm gears
C. Reverted gear train with bevel gears
D. Reverted gear train with worm gears
Answer» B. Epicyclic gear train with worm gears
Discussion
17.

Which type of variator is known as Svetozaro variator?

A. Cone variator with swiveling disc
B. Cone variator with spheres supported on shafts
C. Spheroid with spheres supported on shafts
D. Spheroid with swiveling disc
Answer» E.
Discussion
18.

Whitworth quick return mechanism is obtained by inversion of___________________?

A. slider crank mechanism
B. kinematic chain
C. five link mechanism
D. roller cam mechanism
E. none of the above
Answer» B. kinematic chain
Discussion
19.

Why are graphical errors caused during function generation?

A. Choice of scale
B. Wrong graphical procedure
C. Both a. and b.
D. None of the above
Answer» D. None of the above
Discussion
20.

Why is an overlay method used in synthesis of a function generation?

A. It is used to generate precision positions in four bar mechanism
B. It is used to generate precision positions in slider crank mechanism
C. both a and b
D. none of the above
Answer» D. none of the above
Discussion
21.

Why is a dog clutch used?

A. Used to connect and disconnect machine parts
B. Used to control torque
C. It helps in rotating the shafts at different speeds
D. All of the above
Answer» B. Used to control torque
Discussion
22.

Why is double Hooke's joint used?

A. To obtain uniform velocity ratio
B. To obtain variable velocity ratio
C. Both a. and b.
D. None of the above
Answer» B. To obtain variable velocity ratio
Discussion
23.

With single Hooke’s joint it is possible to connect two shafts, the axes of which have an angular misalignment up to ________________?

A. 10°
B. 20°
C. 30°
D. 40°
E. 60°
Answer» E. 60°
Discussion
24.

Which of the following statements is false for SHM follower motion?

A. SHM can be used only for moderate speed purpose
B. The acceleration is zero at the beginning and the end of each stroke
C. The jerk is maximum at the mid of each stroke
D. Velocity of follower is maximum at the mid of each stroke
Answer» C. The jerk is maximum at the mid of each stroke
Discussion
25.

Which of the following mechanisms produces mathematically an exact straight line motion____________________?

A. Grasshopper mechanism
B. Watt mechanism
C. Peaucellier’s mechanism
D. Tchabichiff mechanism
E. Ackermann mechanism
Answer» D. Tchabichiff mechanism
Discussion
26.

Which of the following mechanism is obtained from lower pair________________?

A. gyroscope
B. pantograph
C. valve and valve gears
D. generated straight line motions
E. all of the above
Answer» F.
Discussion
27.

Which of the following kinematic pairs is classified depending upon the mechanical arrangement between the links?

A. Primatic pair
B. Revolute pair
C. Force closed pair
D. Sliding pair
Answer» D. Sliding pair
Discussion
28.

Which of the following is false statement in respect of differences between machine and structure___________________?

A. Machines transmit mechanical work, whereas structures transmit forces
B. In machines, relative motion exists be-tween its members, whereas same does hot exist in case of structures
C. Machines modify movement and work, whereas structures modify forces
D. Efficiency of machines as well as structures is below 100%
E. Machines are run by electric motors, but structures are not
Answer» E. Machines are run by electric motors, but structures are not
Discussion
29.

Which of the following is a lower pair_______________?

A. ball and socket i
B. piston and cylinder
C. cam and follower
D. A. and B. above
E. belt drive
Answer» E. belt drive
Discussion
30.

Which of the following has sliding motion________________?

A. crank
B. connecting rod
C. crank pin
D. cross-head
E. cross head guide
Answer» E. cross head guide
Discussion
31.

Which of the following disciplines provides study of relative motion between the parts of a machine______________?

A. theory of machines
B. applied mechanics
C. mechanisms
D. kinetics
E. kinematics
Answer» F.
Discussion
32.

Which of the following disciplines provides study of the relative motion between the parts of a machine and the forces acting on the parts___________________?

A. theory of machines
B. applied mechanics
C. mechanisms
D. kinetics
E. kinematics
Answer» B. applied mechanics
Discussion
33.

Which of the following disciplines provides study of the relative motion between the parts of a machine and the forces acting on the parts__________________?

A. theory of machines
B. applied mechanics
C. mechanisms
D. kinetics
E. kinematics
Answer» B. applied mechanics
Discussion
34.

Which of the following disciplines provides study of inertia forces arising from the combined effect of the mass and the motion of the parts_______________?

A. theory of machines
B. applied mechanics
C. mechanisms
D. kinetics
E. kinematics
Answer» E. kinematics
Discussion
35.

Which of the following conditions specify maximum efficiency of spiral gears?

A. (θ + α) / 2
B. (θ – α) / 2
C. Both a. and b.
D. None of the above
Answer» D. None of the above
Discussion
36.

Which of the following conditions can be used to minimize undercutting in cam and follower mechanism?

A. By using larger roller diameter
B. By using internal cams
C. By decreasing the size of the cam
D. All of the above
Answer» C. By decreasing the size of the cam
Discussion
37.

Which of the following condition is true for uniform wear theory?

A. p = constant
B. p/r = constant
C. p.r = constant
D. none of the above
Answer» D. none of the above
Discussion
38.

Which motion of follower is best for high speed cams?

A. SHM follower motion
B. Uniform acceleration and retardation of follower motion
C. Cycloidal motion follower
D. All of the above
Answer» D. All of the above
Discussion
39.

Which is the false statement about the properties of instantaneous center____________________?

A. at the instantaneous center of rotation, one rigid link rotates instantaneously relative to another for the configuration of mechanism considered
B. the two rigid links have no linear velocities relative to each other at the instantaneous centre
C. the two rigid links which have no linear velocity relative to each other at this center have the same linear velocity to the third rigid link
D. the double centre can be denoted either by 02 or Ol2, but proper selection should be made
E. none of the above
Answer» E. none of the above
Discussion
40.

Which gearboxes provide an arithmetic series of feed steps suitable for cutting threads?

A. Epicyclic gear box
B. Differential gear box
C. Norton gear box
D. None of the above
Answer» D. None of the above
Discussion
41.

Which formula is used to calculate maximum efficiency of worm gear?

A. tan δ / tan ( δ + Φ)
B. (1 – sin Φ) / ( 1 + sin Φ)
C. tan ( δ + Φ) / tan δ
D. (1 + sin Φ) / ( 1 – sin Φ)
Answer» C. tan ( δ + Φ) / tan δ
Discussion
42.

Which energy is absorbed by the brakes of an elevator during braking process?

A. Potential energy
B. Kinetic energy
C. Both a. and b.
D. None of the above
Answer» B. Kinetic energy
Discussion
43.

Which clutch is known as wet clutch?

A. Single plate clutch
B. multi plate clutch
C. both a. and b.
D. none of the above
Answer» C. both a. and b.
Discussion
44.

Which belt is a combination of both toothed and belt transmissions used as an intermediate member in variators with axially displaceable cones?

A. Cogged belt
B. V belt
C. Both a. and b.
D. None of the above
Answer» B. V belt
Discussion
45.

Which among the following is/are classified under synthesis problem?

A. Path generation
B. Function generation
C. Body guidance
D. All of the above
Answer» E.
Discussion
46.

Which among the following is not a type of error found in function generation?

A. Structural error
B. Mechanical error
C. Graphical error
D. None of the above
Answer» E.
Discussion
47.

Which among the following involves designing of machine components concerning its shape and size?

A. Kinetics
B. Kinematics
C. Synthesis
D. All of the above
Answer» D. All of the above
Discussion
48.

When a ship travels in a sea, which of the effect is more dangerous___________________?

A. steering
B. pitching
C. rolling
D. all of the above
E. none of the above
Answer» C. rolling
Discussion
49.

What is the effect of reactive gyroscopic couple when an aeroplane takes a right turn and propeller rotates in anticlockwise direction?

A. The nose and tail of the aeroplane are in horizontal plane
B. The nose of the aeroplane is raised and tail is dipped
C. The nose of the aeroplane is dipped and tail is raised
D. None of the above
Answer» D. None of the above
Discussion
50.

What is the effect of reactive gyroscopic couple when aeroplane takes right turn and propeller rotates in clockwise direction?

A. The tail of the aeroplane is dipped and nose is raised
B. The tail of the aeroplane is raised and nose is dipped
C. Reactive gyroscopic couple has no effect when propeller rotates in clockwise direction
D. None of the above
Answer» C. Reactive gyroscopic couple has no effect when propeller rotates in clockwise direction
Discussion