Explore topic-wise MCQs in Mechanical Engineering.

This section includes 92 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Engineering knowledge and support exam preparation. Choose a topic below to get started.

1.

Finer grain size,higher will be the …

A. hardness
B. ductility
C. yield stress
D. none of the above
Answer» D. none of the above
Discussion
2.

In solid solution strengthening to ……the hardness of material.

A. decreases
B. increases
C. reduced
D. none of the above
Answer» C. reduced
Discussion
3.

in flame hardening process,the metal surface after heating to high temperature is quenched with ……

A. oil
B. brine water
C. water
D. all of the above
Answer» D. all of the above
Discussion
4.

case hardening processes are those where……..

A. complete component is through harden
B. complte component is melted
C. only surface of the component ,whose hardness is incresed
D. all of the above
Answer» D. all of the above
Discussion
5.

heat treatment is never required after carburisig treatment.this statement is …………

A. false
B. true
C. not applicable
D. none of the above
Answer» B. true
Discussion
6.

The number of solute atoms is more……will be the local distortion in the lattice.

A. greater
B. smaller
C. less
D. none of the above
Answer» B. smaller
Discussion
7.

The press of finely distributed …….particles increases the elastic limit.

A. soft
B. hard
C. atomic
D. none of the above
Answer» C. atomic
Discussion
8.

dispersion hardening materials can be produced with the help of ……process

A. forging
B. rolling
C. powder metallurgy
D. none of the above
Answer» D. none of the above
Discussion
9.

Dislocation are stopped by a ……

A. nuceation
B. grain growth
C. grain boundry
D. none of the above
Answer» D. none of the above
Discussion
10.

some materials can not be work hardened at normal ambient temp. such as …….. Material.

A. niobium
B. indium
C. beryllium
D. none of the above
Answer» C. beryllium
Discussion
11.

in case of flame hardening ,the heat source is in the form of …….

A. lpg gas flame
B. furnace oil flame
C. oxy-acetylen flame
D. none of the above
Answer» D. none of the above
Discussion
12.

hardenability is nothing but……..

A. ability of metals to get high hardness
B. ability of metals to reduce brittleness
C. ability of metals to get through harden
D. none of the above
Answer» D. none of the above
Discussion
13.

for induction hardening process,the heat source is a …..

A. induction coil carrying current
B. heating coil carrying current
C. metallic probes carrying current
D. none of the above
Answer» B. heating coil carrying current
Discussion
14.

Identify following fig.

A. iron-carbon pha diagram
B. al-cu phase diagram
C. t.t.t. daigram
D. none of the above
Answer» D. none of the above
Discussion
15.

one of the following is main disadvantage of flame hardeing process of nsurface hardeing?

A. possibility of over heating and grain growth
B. close control over case depth is not possible
C. mostly suitable or symmetri components only
D. all of the above
Answer» E.
Discussion
16.

Due to one of the reason given below,give rise to quench cracking?

A. improper quenching medium
B. improper selection of steel
C. improper design of component
D. all of the above
Answer» E.
Discussion
17.

the pearlitic microstructure which is obtain after patenting process is suitable to which manufacturing process

A. casting of cylindrical block
B. forging of cam shaft
C. drawing of wires
D. all of the above
Answer» D. all of the above
Discussion
18.

for induction hardening process,the heat source is a …..

A. induction coil carrying current
B. heating coil carrying current
C. metallic probes carrying current
D. none of the above
Answer» B. heating coil carrying current
Discussion
19.

out of the following methods ,one is method used flame hardening process?

A. stationary method
B. circular and progressive method
C. spiral and progressive method
D. all of the above
Answer» E.
Discussion
20.

The press of finely distributed …….particles increases the elastic limit.

A. soft
B. hard
C. atomic
D. none of the above
Answer» C. atomic
Discussion
21.

The number of solute atoms is more……will be the local distortion in the lattice.

A. greater
B. smaller
C. less
D. none of the above
Answer» B. smaller
Discussion
22.

In solid solution strengthening to ……the hardness of material.

A. decreases
B. increases
C. reduced
D. none of the above
Answer» C. reduced
Discussion
23.

some materials can not be work hardened at normal ambient temp. such as …….. Material.

A. niobium
B. indium
C. beryllium
D. none of the above
Answer» C. beryllium
Discussion
24.

dispersion hardening materials can be produced with the help of ……process

A. forging
B. rolling
C. powder metallurgy
D. none of the above
Answer» D. none of the above
Discussion
25.

Finer grain size,higher will be the …

A. hardness
B. ductility
C. yield stress
D. none of the above
Answer» D. none of the above
Discussion
26.

Dislocation are stopped by a ……

A. nuceation
B. grain growth
C. grain boundry
D. none of the above
Answer» D. none of the above
Discussion
27.

Work hardening also called as

A. precipetation hardening
B. hardening
C. strain hardening
D. none of the above
Answer» D. none of the above
Discussion
28.

In case of carbonitriding,by diffusion of which elements the surface become harder of a metal

A. only carbon
B. carbon and nitrogen
C. only nitrogen
D. none of the above
Answer» C. only nitrogen
Discussion
29.

in flame hardening process,the metal surface after heating to high temperature is quenched with ……

A. oil
B. brine water
C. water
D. all of the above
Answer» D. all of the above
Discussion
30.

One of the following metal alloy is suitable for the precipitation hardenable alloy?

A. al-zn
B. al-ni
C. al-cr
D. al-cu
Answer» E.
Discussion
31.

one of the following is a step for the procedureof precipitation hardening or age hardening?

A. solution treatment
B. quenching
C. aging
D. all of the above
Answer» E.
Discussion
32.

in case of flame hardening ,the heat source is in the form of …….

A. lpg gas flame
B. furnace oil flame
C. oxy-acetylen flame
D. none of the above
Answer» D. none of the above
Discussion
33.

In nitriding process which of the following element is diffused in a surface layer of a steel

A. carbon
B. carbon and nitrogen
C. nitrogen
D. all of the above
Answer» D. all of the above
Discussion
34.

heat treatment is never required after carburisig treatment.this statement is …………

A. false
B. true
C. not applicable
D. none of the above
Answer» B. true
Discussion
35.

Out of the following process,one is not valid with respect to carburising process

A. solid
B. liquid
C. gas
D. all of the above
Answer» E.
Discussion
36.

In carburisng process which of the following element is diffused in a metal surface?

A. nitrogen
B. oxygen
C. carbon
D. carbide dioxide
Answer» D. carbide dioxide
Discussion
37.

case hardening processes are those where……..

A. complete component is through harden
B. complte component is melted
C. only surface of the component ,whose hardness is incresed
D. all of the above
Answer» D. all of the above
Discussion
38.

One of the following defect is aride dur to heat treatment process

A. quench crack
B. warping
C. soft spots
D. all of the above
Answer» E.
Discussion
39.

hardenability of a metal or alloy is largely depend upon one of the following factor?

A. the carbon content of a steel
B. the alloy content of steel
C. quenchng medium
D. all of the above
Answer» E.
Discussion
40.

hardenability is nothing but……..

A. ability of metals to get high hardness
B. ability of metals to reduce brittleness
C. ability of metals to get through harden
D. none of the above
Answer» D. none of the above
Discussion
41.

one of the following is main advantage of Austempering process

A. less distortion and cracking than martempering
B. no need of final tempering process
C. improvement in toughness
D. all of the above
Answer» E.
Discussion
42.

After Austempering process, the phase bainite which obtain is highly hard and brittle phase

A. false
B. true
Answer» B. true
Discussion
43.

In Austempering process, the final phase that is obtain after complete heat treatment cycle

A. austenite
B. bainite
C. martensite
D. pearlite
Answer» C. martensite
Discussion
44.

In case of Austempering, the quenching which is carried out, from high temp is known as

A. fast cooling
B. slow cooling
C. interrupted cooling
D. none of the above
Answer» D. none of the above
Discussion
45.

As the tempering temp increases, hasdness of steel decreases

A. true
B. false
Answer» C.
Discussion
46.

One of the following is type of tempering heat treatment

A. low temperature tempering
B. high temperature tempering
C. medium temperature tempering
D. all of the above
Answer» E.
Discussion
47.

CCR is a minimum cooling rate of steel, by which we get 100% ------phase

A. bainite
B. pearlite
C. austenite
D. martensite
Answer» E.
Discussion
48.

one of the following is main purpose of Normalizing

A. to improve machinability
B. to modify and refine grain
C. to homogenize the microstructure
D. all of the above
Answer» E.
Discussion
49.

Which heat treatment process is carried out after hardening process

A. annealing
B. normalising
C. tempering
D. none of the above
Answer» D. none of the above
Discussion
50.

one of the following cooling rate used for normalizing process

A. furnace cooling
B. water coolong
C. air cooling
D. none of the above
Answer» D. none of the above
Discussion