UPSC Senior Scientific Assistant Electronics Sample Question Paper

If You are appearing in UPSC exam for Senior Scientific Assistant (Electronics) post in Directorate General of Aeronautical Quality Assurance (DGAQA), Department of Defence, Ministry of Defence which will be conducting on 29th Jan 2022 at various exam centers and searching the UPSC Senior Scientific Assistant (Electronics) Previous year papers. Then you are at right place. Here we are providing the UPsC Senior Scientific Assistant (Electronics) Model paper on Material Science

Name the most abundant metal in the earth crust
(a) Aluminium
(b) Copper
(c) Iron
(d) Calcium

Pearlite is the mixture of __________
(a) Ferrite and Cementite
(b) Austenite and Cementite
(c) Ferrite and Austenite
(d) None of these

What is the melting point of Iron ?
(a) 1130 degree Celcius
(b) 1401 degree Celcius
(c) 1492 degree Celcius
(d) 1539 degree Celcius

What is the peristaltic reaction temperature in Iron-Carbon diagram?
(a) 1147 degree Celcius
(b) 1800 degree Celcius
(c) 1400 degree Celcius
(d) 1492 degree Celcius

Magnesium and zinc have ________structure.
(a) BCC
(b) FCC
(c) HCP
(d) None of these

Being different, allotropic forms of same metal, alpha-iron and Gama-iron have same crystal structure ?
(a) True
(b) False
(c) None of these
(d) Cannot be determined

There are ________atoms per unit cell in the FCC structure.
(a) One
(b) Two
(c) Four
(d) Eight

In steel carbon is present in ______
(a) its elemental form
(b) combined form
(c) both elemental and comined form
(d) None of these

In general, cast iron contains carbon not less than _______percent.
(a) 0.5%
(b) 0.8%
(c) 1.0%
(d) 2.1%

The steel, which contain more than 0.8% carbon is called
(a) Hypo-eutectoid
(b) Hypo-eutectoid
(c) Eutectoid
(d) All above

The pupose of annealing is to __________ the steel.
(a) harden
(b) soften
(c) oxidise
(d) carburise

In the case of normalising the cooling rate of object is higher than ___________
(a) annealing
(b) oil quenching
(c) water quenching
(d) None of them

The main purpose of quenching is to transform the austenite of steel to
(a) Martensite
(b) Fine pearlite
(c) Bainite
(d) Coarse pearlite

For carburising of steel, we go for __________hardening.
(a) Core hardening
(b) Induction hardening
(c) Case hardening
(d) Flame hardening

The suitable case hardening process for alloy steel containing chromium, molybdeum is _________
(a) Cyaniding
(b) Nitriding
(c) Carburising
(d) None of these