Type M of mortar has __________ parts of Portland __________ part of lime and _________ parts of sand.
(a) 3,1,9
(b) 3,1,12
(c) 2,1,9
(d) 1,3,12
I had been asked this question in a job interview.
Enquiry is from Load Bearing Walls topic in chapter Load Bearing Walls of Construction & Building Materials