Biomedical Eng. Gate Yearwise 


Biomedical Engineering GATE 2024 Questions with Answer

Ques 1 Biomaterials

A cylindrical engineered tissue was developed with a diameter of 2 cm, height of 3 cm and Young's modulus of 20 MPa. If an axial tensile force of 10 N is applied, the percentage change in the height of the tissue is _______ %. Give your answer rounded off to 2 decimal places.

0.27 is the correct answer.


Ques 2 Biomaterials

Consider the following layers: subcutaneous fat, viable epidermis, stratum corneum, and dermis. Which one of the following represents the correct sequence of the layers from skin surface to within?

A

Dermis, subcutaneous fat, viable epidermis, stratum corneum

B

Dermis, viable epidermis, subcutaneous fat, stratum corneum

C

Stratum corneum, viable epidermis, dermis, subcutaneous fat

D

Viable epidermis, stratum corneum, dermis, subcutaneous fat


Ques 3 Biomaterials

Bioglass 45S5 has a composition of

A

45 wt% SiO2 and a 5:1 molar ratio of Calcium to Phosphorus.

B

45 wt% Hydroxyapatite and 5 wt% SiO2

C

45 wt% Hydroxyapatite and a 5:1 molar ratio of CaO to Ca3(PO4)2.

D

45 wt% SiO2 and 5 wt% Hydroxyapatite.


Ques 4 Biomaterials

Macrophages that are resident in the liver are

A

Histiocyte cells

B

Langerhans cells

C

Kupffer cells

D

Fibroblast cells


Ques 5 Biomaterials

Which one of the following drug release kinetic curves will be ideal for developing an implantable slow-release drug delivery device?

A

B

C

D


Ques 6 Biomaterials

An orthopaedic implant when monitored over 6 months showed the following normalized curves for polymer molecular weight (MW), mass of implant and mechanical strength. Among the choices, what is the most probable reason for the observed changes?

A

Bulk erosion

B

Surface erosion

C

Bulk initially followed by surface erosion

D

No erosion but mechanical breakage due to injury


Ques 7 Biomaterials

In an attempt to integrate engineered tissue with native tissue, three samples of engineered tissue, X, Y, Z, with identical material properties, were co-cultured adjacent to three different native tissues (bone, cartilage and liver). The adhesive strengths of X, Y, Z were observed after 8 weeks as follows.
Adhesive strength for X=150 kPa, Y=250 kPa, Z=350 kPa
Match the native tissue that were used to co-culture X, Y and Z from the following.
I: Liver Tissue
II: Articular Cartilage
III: Devitalized Bone

A

X with I, Y with II and Z with III

B

X with II, Y with III and Z with I

C

X with I, Y with III and Z with II

D

X with III, Y with II and Z with I


Ques 8 Biomechanics

An artificial fore-arm has a moment-of-inertia around the center of mass as 0.3 kg.m2. The mass of the artificial fore-arm is 3 kg. If the distance from the elbow joint to the center of mass of the fore-arm is 20 cm, the moment-of-inertia of the fore-arm about the elbow joint is _________ kg.m2. Give your answer rounded off to two decimal places.

0.42 is the correct answer.


Ques 9 Biomechanics

A person creates an apparatus as shown in the figure to exercise the extensor muscle of the hand. It is given that OP=0.15 m, OQ=0.35 m, θ=30°, the weight of the lower arm =20 N, the center of mass of the lower arm is at point P, the magnitude of the applied tensile force F=50 N. If the extensor muscle is acting with a moment arm of 0.25 m, the muscle force required to hold the hand at the position shown in the figure is _________ N. Give your answer rounded off to the nearest integer.

88 is the correct answer.


Ques 10 Biomedical Engineering

The approximate total cross sectional areas of various types of blood vessels are given below. It was estimated that the velocity of blood in the aorta is 30 cms⁻¹. The time it will take for the blood to travel through a capillary of length 0.5 mm is _________ seconds. Give your answer rounded off to two decimal places.

0.69 is the correct answer.


Ques 11 Biomedical Instrumentation

The circuit shown in the figure functions as which one of the following digital circuit blocks?

A

Negative level triggered D-latch

B

Positive level triggered D-latch

C

Negative edge triggered D-flip-flop

D

Positive edge triggered D-flip-flop


Ques 12 Biomedical Instrumentation

The Bode plot of a 2nd order low pass filter is shown in the figure below. What is the frequency at which the attenuation is 80 dB?

A

10 kHz

B

10 MHz

C

100 kHz

D

100 MHz


Ques 13 Biomedical Instrumentation

A monochromatic beam of y-ray photons is incident on a homogenous tissue. Which of the following relationships hold(s) TRUE for the half-value layer thickness?

A

The first half-value layer is thicker than the second half-value layer.

B

The second half-value layer is thicker than the first half-value layer.

C

All the half-value layers have equal thickness.

D

The ratio of thickness of the first and second half-value layers change based on the intensity of the incident beam.


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