लि कार R

236/2015

Maximum : 100 marks
Time : 1 hour and 15 minutes

The most preferred process for casting gas turbine blades is
(4) die moulding (B) shell moulding
(€) investment moulding (D) sand casting

By which ane of the following methods gray cast iron is usually welded?

(4) TIG welding (B) MIG welding
(C) Gas welding (D) Arc welding
Submerged arc welding takes place :
(^) Under water (B) Inacloud of gas )
(€) Between work surfaces (D) Under a blanket of granular flux

Silicon is added to electrode coating as :
(4) aslipping agent (B) a slag former
(C) ade-oxidant (D) acolouring agent

The preheating of parts to be welded and slow cooling of the welded structure will reduce :
(A) Cracking and incomplete fusion
(B) Cracking and residual stress
(C) Residual stress and incomplete penetration
(D) Cracking and underfill

Automotive crankshafts are made by :
(A) Casting process ന) Welding process
(0 Machining from rolled stock (D) Drop forging process

An imaginary circle which by pure rolling action, gives the same motion as the actual gear
and is called :

(ಗ) addendum circle (B) pitch circle

(0 dedendum circle (D) base circle
An engine produces 10 kW brake power by working with a brake thermal efficiency of 30%. If
the calorific value of fuel used is 40,000 keJ/kg, then what is mass fuel consumption?

(A) 0.5 kghr (B) 3kghr

(¢) 0.3kghr യ) വിജി

1९.7.0.]